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Home My WebLink AboutPlan Review CorrectivesGarfield County BUILDING DEPARTMENT 108 Eighth Street, Suite 401, Glenwood Springs, CO 81601 Tel: /970) 945-8212 Plan Review Correction Notice Project: Spring Born/Silt Farms — Greenhouse + Processing/Office Buildings Address: TBD County Road 331, Silt Building Permit No. BLCO-10-19-6020 Reviewed By: Dave Argo — Plans Examiner Date of Technical Review: 1/15/2020 INCOMPLETE OR MISSING INFORMATION: We have initiated Technical Review of submitted plans for this project and have found the following items to be incomplete or missing from your submittal. We cannot complete our plan review or issue permits until the following items have been adequately addressed and submitted to our office: ARCHITECTURAL PLANS I/1. Architect's Wet Seal/Stamp on "A Series" Drawing Sheets As described more fully in a prior email, Architectural series drawings are to be prepared under direction of a Colorado licensed Architect and all sheets submitted to the Building Dept. shall be wet -sealed as per Colorado state statutes. 1/2. Upstairs Office Floor Plan Layout — Including all interior partitions, fire -rated assemblies and required egress/fire exiting requirements. Original plans submission included this information, but it wasn't included on the more recently submitted Amended Plans. A. Building Sections — Provide cross sections illustrating three dimensional relationships between upper and lower levels and identify/reference fire resistive assembly details as more fully described below. /4. Wall Types — All fire resistive wall construction needs to be clearly identified on floor plans and cross sections. Detailed specifications and fire resistive requirements shall be provided by the Architect and identified and referenced as per nationally recognized listing agency (for example, U.L./USGA). /5. Construction Details & Fire -Resistive Assemblies — All fire resistive elements shall be referenced on floor plans and cross sections including wall, floor/ceiling, roof/ceiling, shaft wall assemblies and structural frame. Provide listing agency's fire resistive ID number on each assembly detail as well as detail components and specifications for fire -rated assemblies. /6. Accessibility — Demonstrate compliance with accessibility requirements for all elements of the building and provide standards/details and specifications for egress, plumbing fixtures, etc. 0. Fire Sprinkler System —An automatic fire sprinkler system is required as per Garfield County Ordinance No. 2018-02 (Table A), but the only reference we can find on drawings for this mostly undefined scope of work is on the Cover Sheet under the heading "Project Data". Additional descriptive specifications — including specific location(s) of the fire sprinkler system within the structure and in compliance with Section 903.3.1.1 shall be submitted to our office for review. STRUCTURAL PLANS 1. Foundation at Common Wall between Greenhouse and Technical Buildings — No foundation details are provided by Structural Engineer along the common wall located between the (2) separate steel buildings. Of greater concern is a note prominently located on cover sheet of Rigid Global Buildings' steel building plans which clearly states that Greenhouse (Phase 1/Phase 2) shall be structurally independent from the RGB building and flatly stating: "No Structural Tie -In is Allowed" — see Sheet C1 of RGB steel building plans. Our office has concerns that there has not been a fully coordinated effort between the (2) independent steel building suppliers on this particular issue, and furthermore, the foundation design provided by SGM Engineers does not clearly address the joining together of these (2) structures including foundation detailing at this common wall. Provide our office with response and follow-up to address these concerns....*NOTE: If adjoining wall between buildings incorporates Fire Wall separation, structural design shall also account for this (see Plan Review Summary on the following pages for additional information). V Plan Review Summary & Correctives Permit No. BLCO-10-19-6020 Project: Spring Born/Silt Farms Greenhouse Location: County Road 331, Silt Code Review By: Dave Argo — Plans Examiner, Garfield County Bldg. Dept. Date: January 15, 2020 Overall Building Summary & Description (Current + Future Uses) Current building permit application includes 2 separate manufactured steel structures — each building supplied by a different Steel Building Manufacturer — with a common/adjoining partition wall located between the 2 buildings as illustrated and summarized below: PHASE 1 SUMMARY: Construction Type: II -B Building A: Greenhouse (single story) 120,960 SF • Occupancy Group U Building B: Technical Building (2 -stories) • Occ Group F-2 Processing + Accessory Spaces • Occ Group S-2 Storage • Occ Group B: Office (2nd Floor) 38,630 SF 2,785 SF 2,885 SF 44,300 SF TOTAL BUILDING SIZE (Current Application) 165,260 SF W.. AAA'Aion 5j • s} awfi4zow4.C• l' ) #&O ril 01 eery. i'A 0.141 A AptilA i400'56 V2,614 ie0 {in' o Op r t-60.cl 0649 / -2,076 icy Future Addition — Drawings indicate an additional Greenhouse (approximately same size as Building A) will be added onto Building B at opposite side from Building A at some future date. If/when that occurs, updated building area calculations will be as follows: PHASE 2 SUMMARY: Construction Type: II -B Building A: Greenhouse #1 (single -story) 120,960 SF • Occupancy Group U Building B: Technical Building (2 -stories) • Occ Group F-2 Processing + Accessory Spaces • Occ Group S-2 Storage • Occ Group B: Office (2nd Floor) 38,630 SF 2,785 SF 2,885 SF 44,300 SF Building C: Greenhouse #2 (single -story) 120,960 SF • Occupancy Group U TOTAL BUILD -OUT SIZE (Current + Future) 286,220 SF Pion Review Summary & Correctives Spring Born/Silt Farms Page 2 Allowable Building Size: As depicted in plans, these (2) steel structures represent a total building area of over 165,000 SF, which exceeds allowable building size per Chapter 5. The future build -out including Building C — Greenhouse Addition represents a total of 286,220 SF. The following options represent alternative scenarios for possible Building Code compliance in accordance with allowable area requirements: • Scenario #1: Industrial Use Exemption — Architect indicates on drawings that building qualifies for exemption from area limitations per Sec. 503.1.1 which states: "Buildings & structures designed to house special industrial processes that require large areas and unusual building heights to accommodate crane -ways or special machinery and equipment ... shall be exempt from building area limitations specified in Sections 504 and 506." Bldg. Dept. Interpretation: Based on the narrow and specific applicable industrial uses as described in Building Code Commentary, this exemption does not apply to Agricultural products. • Scenario #2: Occupancy Group "U" Agricultural Buildings — Appendix C provides an exemption for one-story Group "U" Ag buildings surrounded/adjoined by public ways or open space that is 60 feet minimum in width. Bldg. Dept. Interpretation: Per Appendix C, Section C103.1 this exemption does not apply to Mixed -Use Occupancies which "shall be protected in accordance with Sec. 508". However, if a "Fire Wall" is built between Buildings A and B (as per Section 706 & Table 706.4) to create 2 separate buildings, then this exemption may apply to the Greenhouse (Building A) — see illustration below. ',mi. Irw-I D # 21.743 S-2 oceoplal ove. AA.lifwo i 2 iga,41 . G OA 44,0 rP %A 6aµ G. -f Uppw 1.44,1 oft io$ 260 v�j`Qackp�«tr 0,441. A I141)4tko 'V' Occopmey PRS► 2 -Moue . Not WAI 4 is %apWvn}Z, avAlek,v5 IT b I i L, A1104 *Y a4nlir4{4-rai gi y aw....eavvoL 0) wiikeaf. rlb 9P ,t4W • Scenario #3: Unlimited Area Buildings — As per Section 507, all "Unlimited Area Buildings" must meet all of the following requirements: • The building is equipped throughout with an automatic sprinkler system • The building is surrounded by increased open space, usually at least 60 feet • The buildings are limited to one or two stories above grade plane • The building only houses low -hazard or moderate -hazard occupancies Section 507.5 Two -Story Buildings. The area of a Group B, F, M or S building no more than two stories above grade plane shall not be limited where the building is equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1 and is surrounded and adjoined by public ways or yards not less than 60 feet. Bldg. Dept. Interpretation: These requirements clearly state that "an automatic sprinkler system shall be installed throughout the entirety of the building" — including the Greenhouse — unless, as noted above, the common wall between Buildings A and B is constructed as a "Fire Wall" to create two separate buildings: (1) Building A — not sprinklered, and (2) Building B — fully sprinklered. Plan Review Summary & Correctives Spring Born/Silt Farms Page 3 Allowable Building Size ... continued Action Required: As currently submitted, overall building size exceeds allowable area requirements as described above, and a future Greenhouse Addition (Building C) will eventually add another 121,000 SF. The Architect of Record needs to clearly indicate on drawings how the proposed buildings will be built in compliance with the Building Code and according to one of the following options: 1. Buildings A and 8 regulated as separate buildings with a "Fire Wall" at the common adjoining wall between buildings. Building B requires installation of an automatic fire sprinkler system, but Greenhouse (Building A) can utilize Scenario #2 (above) for unlimited building size without a fire - sprinkler system, but the local Fire District must provide a waiver of the fire sprinkler system requirements at the Greenhouse. 2. Buildings A and 8 regulated as portions of one singular building as per Scenario #3 (above). This option requires installation of an automatic fire sprinkler system throughout the entirety of the building, including the Greenhouse. If the Fire Wall option (item #1) is employed, drawings must clearly illustrate Fire Wall location and otherwise include appropriate detailing and specifications in compliance with fire resistive requirements as described in next section below. If the building includes an automatic fire sprinkler system throughout (as per item #2) then performance specifications shall be revised with appropriate description of proposed fire sprinkler system. Fire Resistive Requirements: Action Required: The following items must be clearly identified on floor plans, building cross sections and/or construction details to fully describe design intent and construction assemblies. For all fire -rated assemblies provide fire assembly listing numbers and details from a nationally recognized listing agency (U.L. or USGA). PO"Fire Wall" is required between Building A and Building B • A Fire Wall (Section 706 and Table 706.4) is required to demonstrate compliance with allowable building area requirements (Chapter 5) and to provide separation of non-sprinklered single -story U occupancy (Building A) with fully fire-sprinklered 2 -story Building B. • Horizontal Continuity required at Fire Wall (Section 706.5) • Vertical Continuity required at Fire Wall (Section 706.6) and Stepped Buildings (Section 707.6.1) • Openings in Fire Wall (Section 706.8) ‘/Fire -Rated Stair Enclosure is required at Interior Exit Stairway from Upstairs Office • Provide 1 -Hour Fire -Rated Stair Enclosure (Section 1023.2) — 100 -foot maximum Exit Access Travel distance is exceeded if interior exit stairway is not enclosed by 1 -hour rated assemblies. See Table 1006.3.2(2) — Footnote (b). • Interior exit stairway shall terminate at an exterior exit from the building. (Section 1023.3) • Horizontal Passageway may be required (Section 1024) • The required egress path may not pass through kitchens, storage rooms or spaces used for similar purposes (Section 1016.2.5) • Openings at interior exit stairway shall be protected (Section 716 and Table 716.5) (;'Fire separation required at "Incidental Uses" as per Table 509 • 1 -Hour fire -rated "Fire Barrier Walls" and horizontal floor/ceiling assembly shall be utilized between Mech. Room/Generator Room and adjoining areas including upstairs Offices. • Shaft enclosure between Mech. Room and Upstairs Offices (Building B) must be 1 -hour fire - rated assembly (Section 713). Plan Review Summary & Correctives Spring Born/Silt Farms Page 4 Means of Egress Requirements: Building A—Greenhouse: • Number of Exits — In accordance with "Appendix C— Group U Agricultural Buildings" one exit is required for each 15,000 SF of floor area. This calculates into a minimum number of 8 exits at the Greenhouse. • In addition, (2) exits as currently shown on plans incorrectly exit Greenhouse (Building A) through an intervening space (Building B). These doors do not qualify as exits, because Buildings A and B are not "accessory use" to one or the other. All egress doors must provide direct access to building exterior. Action Required: Revise plans as noted above to comply with egress requirements. Building B — Upstairs Office: • A Fire -Rated Stair Enclosure is required at Interior Exit Stairway — "Exit Access Travel Distance" as calculated from the upper level's most remote point to upper stair landing is at 100 feet maximum distance allowed as per Table 1006.3.2(2) — Footnote (b). Action Required: One-hour fire -rated stair enclosure is required to insure safe egress for occupants of upper level offices. Interior exit stairway must provide egress from upper level Offices directly to an exterior exit door at the main level (Exit Discharge) — as per Section 1023.3. If necessary, a horizontal Exit Passageway (Section 1024) may be required to connect exit stairway to the building exterior. Since a required egress path may not pass through kitchens, storage rooms or spaces used for similar purposes (Section 1016.2.5) the exit stairway needs to be reconfigured to resolve these specific problems which do not currently comply with building code requirements. Fire Sprinkler Requirements: Per Garfield County Building Resolution and Ordinance No. 2018-02 (Table A) an automatic fire sprinkler system is required throughout, because building size exceeds the maximum allowable area for Type II -B Construction (9,000 SF). This requirement is equally applicable to both Building A (Greenhouse) and Building B, unless a specific waiver is granted by the Fire District. /Action Required: The only reference on drawings we can find for "Fire Sprinkler System" scope of work is a generic note on the Cover Sheet under "Project Data". Provide additional descriptive performance specifications — including specific location(s) —for review and approval by the local Fire District. As noted above under "Allowable Building Size" fire sprinkler requirements are closely tied with other applicable Building Code requirements and need to be properly coordinated with all design aspects of this project. Occupant Load Calculations: Architect's calculations for Occupant Loads as shown on drawings do not accurately reflect Occupant Load Factors as contained in Table 1004.1.2. Occupant Load calculations performed in our plan review are summarized as follows: BUILDING A Occupancy Group Bldg. Area Load Factor No. of Occupants Ag Greenhouse U 120,960 SF 300 404 BUILDING B Main Level: Processing Facility F-2 32,930 SF 300 110 Refrigerated Storage S-2 2,785 SF 500 6 Accessory (Lockers/Restrooms) F-2 2,250 SF 100 23 Sub -Total Main Level: 139 Upper Level: Offices B 2,885 100 29 Sub -Total Upper Level: 29 TOTAL Number of Occupants for Building B: 168 TECHNICAL BUILDING OVERALL WIDTH: 10'-0" -' TECHNICAL BUILDING GREENHOUS OVERALL WIDTH: 3 e GREENHOUSE E SEE SHEETS GI GH -4. Ni1.21i Al "6&Itvizh Lax1 r"" 111,,tile1; r'V,c r -to proviaic stwAtitii 411e A•kt, W4h AIltmA%t& OW',foi 11 I I1 �k� I11 kkrsF N. i1 R �. 11 11 n n I1 11 1111 11 n 11 / I'I idly 5 i' Nli .SII 'V / 1 / 11 SEE TECHNICIAL BUILDING 4 MAi h 10.4v4,1 Flo% II PRESS THROUGH INTERVENING SPACE PER SECTION 1016 2, NOTE 2, 6XCEPT1O (9,1ef oil 508.1x) ...„..„)eco -----V—...,--------"---\-- " -1.--- 4wiy1c incl t- kot #1,U01 icq -f{i(A6�pl A93 049.Au9 L 140f Cc A£140,olry ID ONL 41" 'fes 611W.. hr) 1441401W ihL I 9 IVA PIF tht th'WV SECTION 903.2.4 GROUP F-2 AUTOMATIC FIRE SPRINKLER SYSTEM NOT REQUIRED BY 2015 IBC BUT REQUIRED BY GARFIELD COUNTY AMENDMENTS TO THE 2015 IFC SECTION 903.2, TABLE A. SECTION 906.1 - PORTABLE FIRE EXTINGUISHERS - REQUIRED IN ALL OCCUPANCIES WITHIN 75 FEET OF TRAVEL SECTION 907.2.4 GROUP F - FIRE ALARM - A MANUAL FIRE ALARM IS NOT REQUIRED BUT STRONGLY RECOMMENDED. TABLE 1004.1.2 - OCCUPANCY LOADS REFERENCE LIFE SAFETY PLANS SECOND FLOOR = 27 OCCUPANTS FIRST FLOOR = 99 OCCUPANTS TOTAL PROPOSED BUILDING LOAD = 126 OCCUPANTS 1 -HOUR RATED CEILING ABOVE MECH ROOM GENERATOR ROOM HR RATED; . NCLOSURE PER. FPA 37 4 1 2,1 „•, 1 \: - MAKM w,K. SECTION 1007.1 ACCESSIBLE MEANS OF EGRESS - ALL ACCESSIBLE SPACES ARE SERVED BY AT LEAST ONE TRAVEL ACCESSIBLE MEANS OF EGRESS. DISTANCE = -- 60 FT TABLE 1017.2 - EXIT TRAVEL DISTANCES F-2 OCCUPANCIES - 400 FT (SPRINKLED) B OCCUPANCIES - 300 FT (SPRINKLED) S-2 OCCUPANCIES - 150 FT (NFPA GOVERNS) U OCCUPANCY - 300 SF (NOT SPRINKLED) PARKING REQUIREMENTS 1 TO 25 PARKING SPACES = 1 ADA ACCESSIBLE $ ACE 26 TO 50 PARKING SPACES = 2 ADA ACCESSIBLE - PACES TABLE 2902.1 PLUMBING FIXTURES F-2 OCCUPANCY = 60 OCCUPANTS (1 TLT PER 100, 1 LAV PER 100) B OCCUPANCY = 50 OCCUPANTS (1 TLT PER 25, FIRST 50, 1 LAV PER 40 FOR FIRST S-2 OCCUPANY = 6 OCCUPANTS (1 TLT PER 100, 1 LAV PER 100) U OCCUPANCY = 8 OCCUPANTS (NONE REQUIRED) NUMBER OF TOILETS - 6 (4 REQUIRED) NUMBER OF URINALS - 2 NUMBER OF LAVATORIES - 6 (4 REQUIRED) NUMBER OF SERVICE SINKS - 1 NUMBER OF DRINKING FOUNTAINS - 1 Life Safety Legend ■ EXIT DISCHARGE ACCESSIBLE FEATURE /ar\ MINIMUM EGRESS WIDTH if 00 OCCUPANCY LOAD AT EXIT FIRE EXTINGUISHER CABINET @ 75' RADIUS ILLUMINATED EXIT SIGN WITH EMERGENCY LIGHTS ■ FIRE DEPARTMENT KNOX-BOX Ox MAIN ENTRANCE PROVIDE NO LESS THAN (1) ADA ACCESSIBLE PARKING SPACE MECHANICAL EQ aM; (2.130 SF) 1 OCC PER 30 r ; V8 OCCUPA ACCESSORY OCCUPANCY (2,250 SF) ) OCC PER 100 SF 23 OCCUPANTS GRESS THROUGH= INTERVENING SPACE PER,. SECTION 10162, NOTE 2, CEPTFO 1\� MAT( TRAVEL DISTANCE )IM1TH SPRINKLER = 400 FT MAX TRAVEL DISTANCE = 400 100 1 -HOUR RATE CONSTRUCT 10 BELOW -. AIRS PER 101 7.3 ESS THROUGH EVENING SPACE ' - TION101 i•" TPKV_Li "PtsilAiiii rniiih Irl (r •f 2) 4-) GRESS, REF GREENHOUSE LIFE SAFETY G 4rir WAR r “4.44•1-0- 1,- -roOV;dc. gro►ncii 131Alali i% 7e Ih ‘owfpli.fti6e. With AIioWAbk a h& )1../91M •:"NOT AN E rr\ \• IRY. ICY F 100 SF kNTS H„ CCE PER 1QiE 2. F-2 OCCUPANCY 111 "\\(32,928SF)."•`.'. GN OCCUPANCY OCCUPANTS 1006.2,2 3 REFRIGERA1 ROOMS +1,01 SHALL HAVE EXITS WITHII MAX TRAVEL DISTANCE = 1riv WitI I r/1 t w•ee- _ 4xrao1� 1r�cu►[C! ,4y415 ;11 4,1110I0016L Uoliak owI L V41t U OCCUPANCY GREENHOUSE (120,960 SF) NOT HABITABLE /(\ p,G' T.tbl[ 1Qa.4.12 FIRST FLOOR -LIF -E- ,.NiMVI UJ/11` \;tipp. ?� q 1J EGRESS REF GREENHOUSE LIFE SAFETY A-0.1 1/16" = 1'-0" h `ig..- wite4-.(,kit fa b 131A1101114,1 i/iA/11h I'V4.11 Life Safety Notes BUILDING CODE REVIEW SPRING BORN TECHNICAL BUILDING SPRING BORN, INC DRY HOLLOW RD, ADDRESS TBD SILT, CO 81652 GOVERNING CODES AS AMENDED BY GARFIELD COUNTY 2015 INTERNATIONAL BUILDING CODE (IBC) 2015 INTERNATIONAL ENERGY CONSERVATION CODE (IECC) 2015 INTERNATIONAL MECHANICAL CODE (IMC) 2015 INTERNATIONAL FIRE CODE (IFC) 2015 INTERNATIONAL PLUMBING CODE (IPC) 2017 NATIONAL ELECTRICAL CODE (NEC) 2015 INTERNATIONAL FUEL GAS CODE (IFG) 2010 ADA STANDARDS FOR ACCESSIBILE DESIGN 2015 IBC CODE REVIEW NOTES - TECHNICAL BUILDING OCCUPANCY CLASSIFICATIONS - F -2 FACTORY INDUSTRIAL, LOW HAZARD B BUSINESS S-2 LOW HAZARD STORAGE TYPE OF CONSTRUCTION CONSTRUCTION - TYPE IIB 503.1.1 - SPECIAL INDUSTRIAL OCCUPANCIES REFERENCE GREENHOUSE LIFE SAFETY NOTES TABLE 504.3 ALLOWABLE HEIGHT F AND B OCCUPANCY, SPRINKLED, TYPE IIB = 55 FT TABLE504.4 ALLOWAJ.E&TOEIEQ F-2 OCCUPANCY, SPRINKLED, TYPE IIB = 3 STORIES TABLE 508.2 ALLOWABLE AREA FACTOR F-2 OCCUPANCY; SPRINKLED, TYPE IIB = 69,000 SF 506.2.4 MIX -OCCUPANCY ALLOWABLE AREA P, PERIMETER = 970 FT F, FRONTAGE = 916 FT W, CALCULATED PUBLIC WAY = 60 FT If, AREA FACTOR INCREASE = 1.389 Aa, ALLOWABLE AREA = 100,939 SF MAX Aa, TOTAL ALLOWABLE AREA = 201,878 SF PROPOSED TOTAL AREA = 45,560 SF TABLE 508.4 - REQUIRED SEPARATION F-2 ASSEMBLY & B BUSINESS = 1 HOUR F-2 ASSEMBLY & S-2 STORAGE = NONE F-2 ASSEMBLY & U GREENHOUSE = NONE TABLE 601 - FIRE RESISTANCE RATING , TYPE IIB PRIMARY STRUCTURAL FRAME 0HOURS BEARING WALLS, INTERIOR BEARING WALLS, EXTERIOR NON-BEARING WALLS, EXTERIOR NON-BEARING WALLS, INTERIOR FLOOR CONSTRUCTION ROOF CONSTRUCTION 0 HOURS 0 HOURS 0 HOURS 0 HOURS 0 HOURS 0 HOURS TABLE 602 - FIRE RESISTANCE RATING FOR EXTERIOR WALLS 0 TO FT=1 HOUR 0 V w 0 1 -HR RATED WALL OCCUPANC 2,609 SF 1 OCC PER 100 SP 7 OCCUPANTS COMMON TRAVEL DISTANCE = 75 FT 75 FT COMIIDN4 PATH MAX SHOWN 45 MIN FIRE RESISTANCE RATED GLAZING OR FIRE SPRINKLER WATER CURTAIN PER SECT/ON 705.8.2, • PROTECTED OPENINGS' TABLE 1006.3.2(2) STORIES WITH ONE EXIT - B OCCUP_= r — MAX OCCUPANCY MAX COMMON PA • 1 -HR RATED -- 1 — - EXIT ACCESS TRAVEL DISTAN MAXTRAVEL DISTANCE = 300 FT :14:Mk Exit WAi 6%einiftee. i uw W •fh b+rw;-s Vxitviovi 104.4 AGGREGATE AREA LESS THAN 3,000 SF, NOT A -- REQUIRED ACCESSIBLE AREA V1G54f Pyle] 61'0 wl 14U - /l ---1/y4914+ 014+ 411 6vf li94904A1 ,-.4A ) woof UAAt Qi OttA Icc 4 fp SEI 1/16 Life Safety Notes BUILDING CODE REVIEW SPRING BORN TECHNICAL BUILDING SPRING BORN, INC DRY HOLLOW RD, ADDRESS TBD SILT, CO 81652 GOVERNING CODES AS AMENDED BY GARFIELD COUNTY 2015 INTERNATIONAL BUILDING CODE (IBC) 2015 INTERNATIONAL ENERGY CONSERVATION CODE (IECC) 2015 INTERNATIONAL MECHANICAL CODE (IMC) 2015 INTERNATIONAL FIRE CODE (IFC) 2015 INTERNATIONAL PLUMBING CODE (IPC) 2017 NATIONAL ELECTRICAL CODE (NEC) 2015 INTERNATIONAL FUEL GAS CODE (IFG) 2010 ADA STANDARDS FOR ACCESSIBILE DESIGN 2015 IBC CODE REVIEW NOTES OCCUPANCY CLASSIFICATIONS: F-2 FACTORY INDUSTRIAL, LOW HAZARD B BUSINESS S-2 LOW HAZARD STORAGE TYPE OF CONSTRUCTION CONSTRUCTION - TYPE IIB 503.1.1 -SPECIAL INDUSTRIAL OCCUPANCIES BUILDINGS AND STRUCTURES DESIGNED TO HOUSE SPECIAL INDUSTRIAL PROCESSES THAT REQUIRE LARGE AREAS SHALL BE EXEMPT FROM BUILDING AREA LIMITATIONS TABLE .504.3ALLOWABLE HEIGHT F AND B OCCUPANCY, NON -SPRINKLED, TYPE IIB = 55 FT TABLE 504.4 ALLOWABLE STORIES F-2 OCCUPANCY, SPRINKLED, TYPE IIB = 3 STORIES TABLE 506.2 ALLOWABLE AREA FACTOR F-2 OCCUPANCY, SPRINKLED, TYPE IIB = 23,000 SF 506.2.3 SINGLE -OCCUPANCY ALLOWABLE AREA Aa, ALLOWABLE AREA = 25,312 SF W, CALCULATED PUBLIC WAY = 30 FT If, AREA FACTOR INCREASE = 127 TABLE 508.4 - REQUIRED SEPARATION F-2 ASSEMBLY & B BUSINESS = 2 HOUR F-2 ASSEMBLY & S-2 STORAGE = NONE TABLE 601 - FIRE RESISTANCE RATING , TYPE IIB PRIMARY STRUCTURAL FRAME 0 HOURS BEARING WALLS, INTERIOR BEARING WALLS, EXTERIOR NON-BEARING WALLS, EXTERIOR NON-BEARING WALLS, INTERIOR FLOOR CONSTRUCTION ROOF CONSTRUCTION 0 HOURS 0 HOURS 0 HOURS 0 HOURS 0 HOURS 0 HOURS 1 -HR RATED WALL 1 -HR RA COMMON TRAVEL DISTANCE `•�75 FT CCIIMOAI PATH MAX 45 MIN FIRE RESISTANCE RATED GLAZING OR FIRE SPRINKLER WATER CURTAIN PER SECTION 705.8 2, PROTECTED OPENINGS 1 -HR RATED WALL • • EXIT ACCESS TRAVEL DISTANCE MAX TRAVEL DISTANCE = 300 FT 70 FT TABLE 1006.3 2(2) STORIES WtU-I (1 K• ONE EXIT- B OCCUPY C I MAX OCCUPANCY MAX COMMON PA 1104 4 AGGREGATE AREA IS - LESS THAN 3,000 SF, NOT A-- - REQUIRED ACCESSIBLE AREA c, 1-{W. circ -Rooke- vod-i-gtAiv Nth Rog, via A" S fat Pl$030talasske TABLE 602 - FIRE RESISTANCE RATING FOR EXTERIOR WALLS 0 TO 5 FT = 2 HOUR 5 FT TO 10 FT = 1 HOUR 10 FTTO30FT=0 HOURS THE ENTIRE PERIMETER OF THE BUILDING IS BEYOND 30 FT TO THE NEAREST ADJACENT BUILDING ENVELOPE NO FIRE RATING .7) "Pp 1i+ 141(q dy+.t 6f 6�cif m Vlvef "WA .inky() A- imu, p44.4110,j ev 1 virrw I/441 AGAIG : IIt"= ALO° FIRE AND SMOKE PROTECTION FEATURES required, but in no case shall the height be less than 30 inches (762 mm). ❖ Parapet wall construction shall be of combustible or noncombustible material depending on the exterior wall requirements of the type of construction and shall be of fire -resistance -rated construction as required for the exterior wall. The interior wall cover- ing facing the roof, including the flashing, shall be noncombustible to a height of 18 inches (457 mm) above the roof. The required height of the parapet shall be 30 inches (762 mm) above the roof surface unless the roof slopes upward away from the wall on a pitch of 2 in 12 or greater. In some cases, the last part of this section requires a higher parapet, depend- ing an the FSD. When the slope of the roof is over 2 in 12, the parapet shall extend to a height equal to the height of the roof at the point determined as follows: • In a nonsprinklered building, Table 705.8 requires protected openings for any FSD between 3 and 5 feet (914 rr n and 1524 mm). Therefore, the height of the roof at the 5 -foot (1524 mm) FSD is the height to which the para- pet wall extension must extend, but must always extend at least 30 inches (762 mm) above the roof at the exterior wall. For a nonsprinklered 6/prii/1 tesrh/9il+ Fewoi9 building, the height of the roof at the plane where protected openings are required accord- ing to Table 705.8 is the height at 5 feet (1524 mm) from the common lot line or assumed prop- erty line. See Commentary Figure 705.11.1(1). • For a sprinklered building, Table 705.8 never requires protected openings. Therefore, for a sprinklered building the parapet need only extend 30 inches (762 mm) above the roof, regardless of the slope of the roof or the FSD. See Commentary Figure 705.11.1(2). SECTION 706 FIRE WALLS 706.1 General. Each portion of a building separated by one or more fire walls that comply with the provisions of this sec- tion shall be considered a separate building. The extent and location of such fire walls shall provide a complete separa- tion. Where a fire wall separates occupancies that are required to be separated by a fire barrier wall, the most restrictive requirements of each separation shall apply. ❖ Fire walls serve to create separate buildings for pur- poses of allowable area and type of construction requirements (see the definition of "Area, building" in For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. " 5' FSD ROOF ELEVATION 1035 FT. ®PARAPET HEIGHT 3' - 6" 12 12 ,4` ELEVATION 100 Figure 705.11.1(1) PARAPET WALL EXTENSION WITH SLOPING 100% ROOF AND NONSPRINKLERED BUILDING 7-26 2015 INTERNATIONAL BUILDING CODE®COMMENTARY Section 202). All code provisions that apply to build- ings would bo applied individually to the "building" on each side of the fire wall. Because of the special allowances for allowable areas, a fire wall must pro- vide a higher level of fire safety, continuity and struc- tural integrity than other types of fire -resistance -rated walls. When the designer utilizes a fire wall, he or she must design the fire wall to meet this section. It is not intended that fire walls can be provided in the horizontal plane to create separate buildings. Fire walls cannot be utilized to increase the allowable building height. However, offsetting two vertical sec- tions of fire wall is permissible as long as the required fire -resistance rating and structural stability are main- tained. 706.1.1 Party walls. Any wall located on a lot line between adjacent buildings, which is used or adapted for joint service between the two buildings, shall be constructed as a fire wall in accordance with Section 706. Party walls shall be con- structed without openings and shall create separate buildings. Exception: Openings in a party wall separating an anchor building and a mall shall be in accordance with Section 402.4.2.2.1. ❖ A party wall is a fire wall on an interior lot line, adapted for joint use by both buildings. It is distin- guished from other fire walls in that it is on the prop- erty line and serves to separate buildings usually owned by two separate parties. When two separate structures are built up to the property line, the designer has the option of using two separate exterior FIRE AND SMOKE PROTECTION FEA I URE6 walls with zero FSD or a party wall. Since there is a real property line involved, the prohibition for open- ings between the two buildings is important and even utilities cannot penetrate the party wall. Unlike fire walls in other buildings, which can have openings in them, party walls cannot have any openings in them (see Section 706.8 for opening limits on other fire walls). The exception to allow openings is important since many anchor stores are actually owned by the major department store while the mall is owned by a sepa- rate entity. The fact that there is a real property line at the separation walls between an anchor and a mall means that technically there is a party wall, but open- ings are normally present and a necessary function of the mall and anchor. 706.2 Structural stability. Fire walls shall be designed and constructed to allow collapse of the structure on either side without collapse of the wall under fire conditions. Fire walls designed and constructed in accordance with NFPA 221 shall be deemed to comply with this section. •e• Since the collapse of one building from fire conditions should not cause the collapse of an adjacent building, a fire wall is required to be capable of withstanding the collapse of the construction on either side of the wall under fire conditions. An exception to the provi- sion is found in Exception 5 to Section 706.6. In this situation, the issue of structural stability would still apply if the fire was in the buildings located above the horizontal separation required in Section 509.2, Item For SI: 1 inch = 25.4 mm. Figure 705.11.1(2) PARAPET WALL EXTENSION WITH SLOPING ROOF SPRINKLERED BUILDING 2015 INTERNATIONAL BUILDING CODE®COMMENTARY 7-27 FIRE AND SMOKE PROTECTION FEATURES 1. However, it would clearly be impossible for the buildings above the separation or, for that matter, the fire wall to be able to withstand the collapse of the building beneath it. Since the building below is of Type IA construction and the separation has a 3 -hour fire -resistance rating, this should not be a problem. See 706.6, Exception 5, regarding fire walls in this sit- uation. There are various methods of designing and con- structing fire walls for structural stability during a fire. Among the systems used are cantilevered or free- standing walls, laterally supported and tied walls, and double wall construction. For masonry walls, the NCMA TEK Bulletin 5-8B contains helpful informa- tion. For an example with a masonry fire wall, see Commentary Figure 706.2(1). The Gypsum Associa- tion's Fire Resistance Design Manual contains con- struction details for area separation walls (party wall/ fire walls) which have been accepted as fire walls. For an example of a gypsum board fire wall, see Commentary Figure 706.2(2). The collapse of structural members at some dis- tance from the wall can generally be ignored, but the structural members that are supported by the wall or VERTICAL REINFORCEMENT, AS REQUIRED GROUT, AS REQUIRED BREAK-AMY-- CONNECTOR REAK AWMY-- CONNECTOR METAL DECK WITH CONCRETE ROOFING MEMBRANE STEEL BAR JOIST "x" BOTH SIDES (typ) SEE TABLE 1 Table 1— Thermal Movement Values for Steel Frames (Ref. 9.10) Length of bay peipendicular to fire wall ft (m) 20 (6.10) 25 (7.62) 30 (9.14) 35 (10.67) 40 (12.19) 45 (13.72) 50 (15.24) 55 (16.76) Minimum clearance "x" for steel frame expansion, in. (mm) 2`, (64) 3'4 (83) 3 3/4 (95) 4'/s (114) 5 (127) 5 3/4 (146) 6' (159) 7 (178) 7'/z (191) J STEEL COLUMN CONCRETE MASONRY FIRE W LL Figure 706.2(1) DETAILS OF MASONRY FIRE WALL FOR STABILITY (Compliments of NCMA) 7-28 2015 INTERNATIONAL BUILDING CODE®COMMENTARY that are attached directly to the wall for lateral support do require special attention. Double fire walls shall be assumed to have the required structural stability if they are constructed in accordance with NFPA 221. NFPA 221 covers more than double fire walls, but the IBC only references it for double fire walls. 706.3 Materials. Fire walls shall be of any approved non- combustible materials. Exception: Buildings of Type V construction. ❖ This section requires that fire walls be constructed of noncombustible materials unless both buildings are of Type V (combustible) construction. This is consis- tent with the provisions of Section 602, which require exterior walls of buildings of Type I, II, III and IV to be built of noncombustible construction, while buildings FIRE AND SMOKE PROTECTION FEATURES of Type V construction are permitted to be built of combustible exterior walls. 706.4 Fire -resistance rating. Fire walls shall have a fire - resistance rating of not less than that required by Table 706.4. ❖ The required fire -resistance rating must comply with the more restrictive occupancy of Table 706.4. For example, if two buildings of Type II construction with occupancies in Groups S-1 and B are built of any construction type and separated by a fire wall, the fire wall is required to have a fire -resistance rating of 3 hours (in accordance with Table 706.4 based on Group S-1). The provisions of Section 706.1 should also be reviewed when determining the required fire - resistance rating. If the occupancies involved require a separation, or are not permitted in a mixed occu- ROOF ALUMINUM CLIPS GYPSUM BOARD CEILINGi ALUMINUM CLIPS GYPSUM BOARD % CEILINGS AND WALLS`, ROOF TRUSSES AREA SEPARATION WALL (PARTY/FIRE WALL) FIRE BLOCKS FLOOR JOISTG OR TRUSSES SLAB OR FOUNDATION Figure 706.2(2) DETAILS OF GYPSUM BOARD AREA SEPARATION WALLS (FIREWALL) (Compliments of Gypsum Association) 2015 INTERNATIONAL BUILDING CODE®COMMENTARY 7-29 FIRE AND SMOKE PROTECTION FEATURES pancy building, then the most restrictive requirement between that and the fire wall provisions will apply. TABLE 706.4 FIRE WALL FIRE -RESISTANCE RATINGS GROUP FIRE -RESISTANCE RATING (hours) A, B, E, H-4, I, R-1, R-2, U 3a F-1, H-36, 1-1-5, M, S-1 3 H-1, H-2 4b F-2, S-2, R-3, R-4 2 a. In Type II or V construction, walls shall be permitted to have a 2 -hour fire -resistance rating. b. For Group H-1, H-2 or H-3 buildings, also see Sections 415.7 and 415.8. :• The fire -resistance ratings represent a relationship between the fuel load and an exposure to fire severity that is equivalent to the standard time -temperature curve. The relationship is based on a number of full- scale fire tests by the U.S. Department of Com- merce's National Bureau of Standards (NBS) con- ducted in the 1920s to determine how actual building fires compared with the temperatures represented by the standard time -temperature curve (see commen- tary, Section 703.2). An analysis of tests documented by S.H. Ingberg indicates that the weight per square foot (psf) of ordi- nary combustibles, such as wood and paper, with a heat of combustion of 7,000 to 8,000 British thermal units (Btu) per pound (16 282 to 18 608 kJ/kg), is related to hourly fire severity as described in Com- mentary Figure 706.4(1). By comparing Table 706.4 to Commentary Figure 706.4(2), it shows that the table is not based solely on the average fuel Toad of the occupancy. Not only are other factors, such as occupant density and evacuation capability, incorpo- rated into the required fire -resistance rating, but it must also be recognized that fuel loads in a building Average fuel load psf 5 71/2 10 15 20 30 40 50 60 kg/ma 24.4 36.6 48.8 73.2 97.6 146.5 195.3 244.1 292.9 3/4 1 11/2 2 3 41/2 6 7'/2 For SI 1 pound per square foot = 4.882 kg/m2. Figure 706.4(1) RELATIONSHIP BETWEEN FUEL LOAD AND FIRE ENDURANCE 7-30 are not evenly distributed. For example, the average fuel Toad for an occupancy in Group B may be 5 to 10 psf (24 to 49 kg/m2). The fuel load in file and storage rooms, however, may be 10 to 20 psf (49 to 98 kg/ m2). While other sections of the code may address these areas by mandating an automatic fire suppres- sion system with a partition capable of resisting the passage of smoke or a fire -resistance -rated enclo- sure of the incidental use area, the potential for higher fuel loads is also factored into determining the required fire -resistance rating. The minimum fire -resistance ratings required in Table 706.4 generally correlate with the fire -resis- tance ratings required by Table 508.3.3. However, Table 706.4 contains provisions that acknowledge the need for more conservative ratings for fire walls due to their unique role in creating separate buildings. Note a allows a reduction in the fire -resistance rat- ing of the fire walls in buildings of Type II or V con- struction. For instance, the fire -resistance rating of a fire wall separating a Type II building from a Type V building can be only 2 hours. If the buildings on both sides of the fire wall are Type II construction, the same reduction is allowed. If the buildings on both sides of the fire wall are Type V construction, the same reduction is allowed. If the building on either side of the fire wall is of another type of construction than Type II or V, the greater fire -resistance rating is required. Due to the unique nature of the hazards presented by occupancies of Groups H-1, H-2 and H-3, Table 706.4 includes Note b, which references Sections 415.7 and 415.8 for specific requirements relative to the construction of such buildings (see commentary, Sections 415.7 and 415.8). Occupancy Combustibles in occupancy (psf) Fire severity (hours) Assembly Business Educational Factory—Industrial Low hazard Moderate hazard Hazardous Institutional Mercantile Residential `Storage + Low hazard LModerate hazard 5 to 10 5 to 10 5 to 10 0 to 10 10 to 25 Variable 5 to 10 10 to 20 5 to 10 0 to 10 10 to 30 For SI: 1 pound per square foot = 4.882 kg/m2. 1/2 to 1 1/Z to 1 1/2 to 1 0 to 1 1 to 3 Variable 1/2 to 1 1 to 2 1/2 to 1 0 to 1 1 to 1 Figure 706.4(2) OCCUPANCIES—FUEL LOAD -FIRE SEVERITY 2015 INTERNATIONAL BUILDING CODE®COMMENTARY 706.5 Horizontal continuity. Fire walls shall be continuous from exterior wall to exterior wall and shall extend not less than 18 inches (457 mm) beyond the exterior surface of exte- rior walls. Exceptions: 1. Fire walls shall be permitted to terminate at the inte- rior surface of combustible exterior sheathing or sid- ing provided the exterior wall has a fire -resistance rating of not less than 1 hour for a horizontal dis- tance of not less than 4 feet (1220 mm) on both sides of thefire wall. Openings within such exterior walls shall be protected by opening protectives having a fire protection rating of not less than 3/4 hour. 2. Fire walls shall be permitted to terminate al the inte- rior surface of noncombustible exterior sheathing, exterior siding or other noncombustible exterior fin- ishes provided the sheathing, siding or other exterior noncombustible finish extends a horizontal distance of not less than 4 feet (1220 mm) on both sides of the fire wall. 3. Fire walls shall be permitted to terminate at the inte- rior surface of noncombustible exterior sheathing where the building on each side of the fire wall is protected by an automatic sprinkler system installed in accordance with Section 903.3.1.1 or 903.3.1.2. ❖ Historically, the codes have addressed the hazards of fire exposure at the fire wall from only a vertical per- spective; namely, at the roof (see Section 706.6). Section 706.5 addresses a similar fire hazard con- cern from the horizontal perspective; namely, at the intersection of the fire wall and the exterior wall. The 18 -inch (457 mm) extension is intended to abate the potential for fire to travel from one building to the other around the fire wall. The 18 -inch (457 mm) extension is required to extend the full height of the fire wall. The three exceptions acknowledge the effect certain types of construction will have on fire breaching the exterior wall and exposing the adjacent building. Specifically, fire -resistance -rated construc- tion (see Exception 1), noncombustible finish materi- als (see Exception 2) and noncombustible sheathing materials coupled with sprinkler protection (see Exception 3) provide the necessary barrier to limit fire spread across the exterior surface. The difference between Exceptions 2 and 3 is that Exception 2 would not permit a combustible exterior finish to be placed over the noncombustible exterior wall con- struction, while Exception 3 would allow a combusti- ble exterior finish, provided the building is sprinklered with either an NFPA 13 or 13R system. 706.5.1 Exterior walls. Where the fire wall intersects exterior walls, the fire -resistance rating and opening pro- tection of the exterior walls shall comply with one of the following: 1. The exterior walls on both sides of the fire wall shall have a 1 -hour fire -resistance rating with 3/4 -hour protection where opening protection is required by FIRE AND SMOKE PROTECTION FEATURES Section 705.8. The fire -resistance rating of the exte- rior wall shall extend not less than 4 feet (1220 mm) on each side of the intersection of the fire wall to exterior wall. Exterior wall intersections at fire walls that form an angle equal to or greater than 180 degrees (3.14 rad) do not need exterior wall protec- tion. 2. Buildings or spaces on both sides of the intersecting fire wall shall assume to have an imaginary lot line at the fire wall and extending beyond the exterior of the fire wall. The location of the assumed line in relation to the exterior walls and the fire wall shall be such that the exterior wall and opening protection meet the requirements set forth in Sections 705.5 and 705.8. Such protection is not required for exte- rior walls terminating at fire walls that form an angle equal to or greater than 180 degrees (3.14 rad). ❖ Tliis seelioil deals only with fire walls that terminate at an exterior wall that does not continue in the same horizontal plane but the exterior walls on each side of the fire wall form an angle of less than 180 degrees (3.14 rad). For example, the required fire wall may end at an inside corner of an L-shaped building. Should this occur, not only does Section 706.5 apply, but this section has extra requirements to mitigate the exterior wall fire exposure from one building to another. This section states two methods of complying. See Com- mentary Figures 706.5.1(1), 706.5.1(2) and 706.5.1(3). 706.5.2 Horizontal projecting elements. Fire walls shall extend to the outer edge of horizontal projecting elements such as balconies, roof overhangs, canopies, marquees and similar projections that are within 4 feet (1220 mm) of the fire wall. Exceptions: 1. Horizontal projecting elements without concealed spaces, provided the exterior wall behind and below the projecting element has not less than 1 -hour fire - resistance -rated construction for a distance not less ' than the depth of the projecting element on both sides of the fire wall. Openings within such exterior walls shall be protected by opening protectives hav- ing afire protection rating of not less than 3/4hour. 2. Noncombustible horizontal projecting elements with concealed spaces, provided a minimum 1 -hour fire - resistance -rated wall extends through the concealed space. The projecting element shall be separated from the building by not less than 1 -hour fire -resis- tance -rated construction for a distance on each side of the fire wall equal to the depth of the projecting element. The wall is not required to extend under the projecting element where the building exterior wall is not less than 1 -hour fire -resistance rated for a dis- tance on each side of thefire wall equal to the depth or the projecting element. Openings within such exterior walls shall be protected by opening protec- tives having a fire protection rating of not less than 3/4 hour. 2015 INTERNATIONAL BUILDING CODE® COMMENTARY 7-31 FIRE AND SMOKE PROTECTION FEATURES 3. For combustible horizontal projecting elements with concealed spaces, the fire wall need only extend through the concealed space to the outer edges of the projecting elements. The exterior wall behind and below the projecting element shall be of not less than 1 -hour fire -resistance -rated construction for a distance not less than the depth of the projecting ele- ments on both sides of the fire wall. Openings within such exterior walls shall be protected by opening protectives having a fire -protection rating of not less than 3/4 hour. ❖ Fire walls are typically used to reduce the building area for the purpose of code compliance. However, many structures divided by fire walls are still detailed as a contiguous structure with projecting elements located on the exterior wall that extend across the fire wall. These projecting elements represent a potential conduit for fire to be transferred from one side of the building to the other side of the building. Even if the projecting elements are terminated at a distance in close proximity to the fire wall, the potential for fire spread to the adjacent projecting element still exists. In this section, 4 feet (1219 mm) (measured from the fire wall) is considered the appropriate threshold. This section requires the fire wall to extend to the outer edge of the projecting element when such an element is located within 4 feet (1219 mm) of the fire wall. For example, in a contiguous residential struc- ture with interior lot lines and fire walls or party walls between each dwelling unit, and where balconies are located within 4 feet (1219 mm) of the party or fire wall, then the fire/party wall must be extended to the outer edge of the balcony or to a point in line with the outer edge of the balcony. Exception 1 acknowledges the reduction in hazard due to the lack of a concealed space crossing the fire EXTERIOR OPEN SPACE EXTERIOR WALL For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. % HR OPENING - PROTECTION BLDG A 1 -HR FIRE-RESISTANT RATED WALL Figure 706.5.1(1) EXAMPLE OF METHOD 1 LL, EXTERIOR WALL 1- J Q re 3 w0 ct wa LL BLDG B 7-32 2015 INTERNATIONAL BUILDING CODE®COMMENTARY wall. However, since the projecting element provides a connection between the buildings, there is still a potential for fire to transfer across the wall, thus the need for a rated exterior wall separation between the inside of the building and the projection. Exceptions 2 and 3 address projecting elements with concealed spaces of noncombustible and combustible construc- tion, respectively. 706.6 Vertical continuity. Fire walls shall extend from the foundation to a termination point not less than 30 inches (762 mm) above both adjacent roofs. Exceptions: 1. Stepped buildings in accordance with Section 706.6.1. EIRE AND SMOKE PROTECTION TEATIMES 2. Two-hour fire -resistance -rated walls shall be permit- ted to terminate at the underside of the roof sheath- ing, deck or slab, provided: 2.1. The lower roof assembly within 4 feet (1220 mm) of the wall has not less than a 1 -hour fire -resistance rating and the entire length and span of supporting elements for the rated roof assembly has afire -resistance rat- ing of not less than 1 hour. 2.2. Openings in the roof shall not be located within 4 feet (1220 mm) of the fire wall. 2.3. Each building shall be provided with not less than a Class B roof covering. • \. (15:04, ti 10' FSD 0 • 5' FSD •• \ N m 3' FSD Q 1/7///(///7/1/7/71/7/7////////7/Irr7//// 1 EXT. WALL- • 0 0) in , I of LL{ O -HR F -RR A— NO OPENINGS B —15% UNPROrECIEL) C — 25% UNPROTECTED 5. 1 -HR F -RR' 2' BLDG A 3' - A 5' 2 -HR F -RR Figure 706.5.1(2) EXAMPLE OF METHOD 2 m O 0 m in LL x N 2015 INTERNATIONAL BUILDING CODE® COMMENTARY 7-33 FIRE AND SMOKE PROTECTION FEATURES 3. Walls shall be permitted to terminate at the under- side of noncombustible roof sheathing, deck or slabs where both buildings are provided with not less than a Class B roof covering. Openings in the roof shall not be located within 4 feet (1220 mm) of the fire wall. 4. In buildings of Type III, 1V and V construction, walls shall be permitted to terminate at the underside of combustible roof sheathing or decks, provided: 4.1. There are no openings in the roof within 4 feet (1220 mm) of the fire wall, 4.2. The roof is covered with a minimum Class B roof covering, and 4.3. The roof sheathing or deck is constructed of fire -retardant -treated wood for a distance of 4 feet (1220 mm) on both sides of the wall or the roof is protected with 5/8 -inch (15.9 EXTERIOR NONRATED EXTERIOR WALL IIIII.11„„/„/„„l11/.„/ „„, IMAGINARY LOT UNLIMITED UNPROTECTED LL 0 BLDG A GROUP M TYPE II B SPRINKLERED OPENING Figure 708.3.1(3) EXAMPLE OF METHOD 2 I FT FIRE WALL CO CO GROUP M TYPE II B SPRI NKLERED 7-34 2015 INTERNATIONAL BUILDING CODE®COMMENTARY mm) Type X gypsum board directly beneath the underside of the roof sheathing or deck, supported by not less than 2 -inch (51 mm) nominal ledgers attached to the sides of the roof framing members for a distance of not less than 4 feet (1220 mm) on both sides of the fire wall. 5. In buildings designed in accordance with Section 510.2, fire walls located above the 3 -hour horizontal assembly required by Section 510.2, Item 1 shall be permitted to extend from the top of this horizontal assembly. 6. Buildings with sloped roofs in accordance with Sec- tion 706.6.2. ❖ One of the primary purposes of a fire wall is to pro- vide protection from an exposure fire. A fire wall must be continuous from the foundation to or through the roof. The fire wall is required to extend to 30 inches (762 mm) above the roof surface (see Commentary Figure 706.6 for a diagram of a typical fire wall). Where other provisions are met that will restrict the spread of fire, this 30 -inch (762 mm) extension is not required (see Exceptions 1 through 5). Exception 1 stipulates that fire walls separating two buildings that have different roof levels must comply with the provi- sions of Section 706.6.1. Exception 2 to this section's requirement for a par- apet applies to buildings where: a. The maximum required fire -resistance rating of the fire wall is 2 FIRE AND SMOKE PROTECTION FEATURES hours; b. The roof assembly located within 4 feet (1219 mm) of the fire wall has a minimum fire -resis- tance rating of 1 hour (including all supporting ele- ments and structural members); c. No roof openings are located within 4 feet (1219 mm) of the fire wall; and d. The buildings on either side of the fire wall have a minimum Class B roof covering. The provi- sions of Exception 2 are not applicable to buildings with combustible roof construction where a fire wall is required to have a fire -resistance rating of 3 hours or greater. Buildings where the fire wall is required to have a 3 -hour or greater fire -resistance rating must comply with the general provisions of Section 706.6, or with Exception 3 or 4 in order to qualify for the par- apet extension exception. Exception 3 states that, since the intent of the para- pet is to prevent fire spread over the roof, it is not required if the entire roof is of noncombustible con- struction; the fire wall is continuous to the underside of the roof deck, roof slab or roof sheathing; the roof - covering material has a minimum Class B classifica- tion in accordance with the provisions of Section 1505.3 (see commentary, Section 1505.3); and there are no roof openings located within 4 feet (1219 mm) on either side of the fire wall. The intent of the requirement for a Class B roof covering is due to the fact that roof coverings are not considered part of the roof, and therefore, are not subject to the noncombustibility requirements of this section. This section requires that the roof covering HEIGHT 2'-6" ABOVE ROOF SURFACE (SECTION /05.6) OR UNDERSIDE OF ROOF DECK ALUMINUM CLIP (IN FIRE CONDITION, CLIPS SOFTEN, WHICH ALLOWS WOOD FRAMING TO DETACI I WITHOUT JEOPARDIZING FIRE - RESISTANCE -RATED FIRE WALL CONSTRUCTION) TRACK CAP GYPSUM FLASHING ROOFING WOOD FRAMING STEEL STUD For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. ...*N— 2 - 1" THICK GYPSUM PANELS IN VERTICAL STEEL STUDS (2 LAYERS OF GYPSUM PANELS AND STEEL STUDS PROVIDE 2 -HOUR FIRE - RESISTANCE -RATED FIRE WALL ASSEMBLY) GYPSUM WALLBOARD 2" x 4" FRAMING Figure 706.6 GENERIC FIRE WALL EXAMPLE (Source: National Gypsum Company) 2015 INTERNATIONAL BUILDING CODE®COMMENTARY 7-35 FIRE AND SMOKE PROTECTION FEATURES be effective against moderate fire test exposure to reduce the potential for fire spread across the roof. The restriction on the location of roof openings is intended to minimize the potential of the spread of fire from one building to an adjacent building via roof openings, such as skylights, penetrations or roof win- dows. This fire spread could occur from something such as a fan that breaches the roof opening in the involved building and exposes roof openings in the adjacent building to direct fire or to burning brands, which could land on the roof, burn through the roof opening and ignite combustibles in the interior of the adjacent building. The 4 -foot (1219 mm) threshold provides a reasonable approximation of a fire plume, beyond which the exposure to fire of the adjacent building is reduced. Exception 4 to the requirement in Section 706.6 for a parapet is the condition in build- ings of Type 111, IV and V construction where the sheathing or deck is constructed of noncombustible materials or approved fire -retardant -treated wood for a distance of 4 feet (1219 mm) on both sides of the wall (see the commentary to Section 2303.2 for addi- tional information on fire -retardant -treated wood) or where the prescribed application of 5/8 inch (15.9 mm) Type X gypsum board is applied to the underside of the deck for a distance of 4 feet (1219 mm) on both sides of the wall. The roof coverings on both buildings must have a minimum Class B rating and no roof openings are to be located within 4 feet (1219 mm) of the fire wall (see commentary, Section 508.2). The intent is the same: to resist the passage of flame beyond the fire wall. 706.6.1 Stepped buildings. Where a fire wall serves as an exterior wall for a building and separates buildings having different roof levels, such wall shall terminate at a point not less than 30 inches (762 mm) above the lower roof level, pro- vided the exterior wall for a height of 15 feet (4572 mm) above the lower roof is not less than 1 -hour fire -resistance - rated construction from both sides with openings protected by fire assemblies having a fire protection rating of not less than 3/4 hour. Exception: Where the fire wall terminates at the underside of the roof sheathing, deck or slab of the lower roof, pro- vided: 1. The lower roof assembly within 10 feet (3048 mm) of the wall has not less than a 1 -hour fire -resistance rating and the entire length and span of supporting elements for the rated roof assembly has a fire -resis- tance rating of not less than 1 hour. 2. Openings in the lower roof shall not be located within 10 feet (3048 mm) of the fire wall. d• The basic provisions of Section 706.6 require that a parapet extend a minimum of 30 inches (762 mm) above the roof surfaces on both sides of the fire wall, which would then require fire walls separating build- ings with different roof heights to extend 30 inches (762 mm) above the highest roof surface. The provi- sions of Section 706.6.1 address situations where a fire wall separates adjacent buildings with a differ- ence in roof height. These provisions acknowledge that fire exposure to the exterior wall of an adjacent building from the roof of a lower building represents, to a certain extent, a reduced hazard. This section retains the fire wall extension above the lower roof surface and places a 15 -foot (4572 mm) limit on rated wall construction and opening pro- tectives, while the exception allows the fire wall extension to be eliminated as long as a fire barrier, in the form of 1 -hour -rated roof construction, is provided that extends a minimum of 10 feet (3048 mm) from the fire wall. The option provided by this section per- mits openings in an exterior wall that extend above the fire wall, where the fire wall extends 30 inches (762 mm) above the lower roof surface, and the exte- rior wall extending above the fire wall is constructed as a 1 -hour fire -resistance -rated wall rated for expo- sure from both sides for a distance of 15 feet (4572 mm) above the lower roof surface. Where the fire wall and exterior wall comply with these requirements, openings are permitted in the exterior wall extension, provided that all openings located within 15 feet (4572 mm) of the lower roof surface are protected with 3/4 -hour -rated opening protectives. Openings located more than 15 feet (4572 mm) above the lower roof surface are not required to have opening protec- tives [see Commentary Figure 706.6.1(1)]. The provi- sions of this section are similar to those contained in Section 704.10 for vertical exposure of exterior open- ings. They require that when the difference in height between the roof surfaces of the adjacent buildings is less than 15 feet (4572 mm), the exterior wall exten- sion is required to extend to the underside of the upper roof deck [see Commentary Figure 706.6.1(2)].The exception permits openings in the roof that extend above the fire wall, where: a. The fire wall terminates at the bottom of the roof deck of the lower roof; b. The lower roof assembly has a mini- mum 1 -hour fire -resistance rating for a minimum dis- tance of 10 feet (3048 mm) from the fire wall; and c. There are no openings located in the lower roof within 10 feet (3048 mm) of the fire wall. Openings located in the exterior wall above the lower roof surface are not required to have opening protectives [see Com- mentary Figure 706.6.1(3)]. It must be noted that all structural elements, including beams, columns and bearing walls that provide support for the fire -resis- tance -rated roof assembly, must also have a 1 -hour fire -resistance rating for their entire length or span in order to maintain the effectiveness of the rated roof assembly. The provisions of this section are similar to those contained in Section 1023.7 for the protection of the exterior walls of exit stairways. The provisions for stepped buildings only apply where a fire wall is required in between the buildings and do not apply to party walls on real property lines. 7-36 2015 INTERNATIONAL BUILDING CODE®COMMENTARY FIRE AND SMOKE PROTECTION FEATURES NO OPENING PROTECTIVES REQUIRED 3/4 -HOUR -RATED OPENING PROTECTIVES REQUIRED UPPER ROOF LOWER ROOF For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. Figure 706.6.1(1) FIRE WALLS—STEPPED BUILDINGS O -HOUR -RATED BX IEHIOH WALL 1 -HOUR -RATED EXTERIOR WALL FIRE WALL 3/4 -HOUR -RATED - OPENING PROTECTIVES REQUIRED UPPER ROOF LOWER ROOF For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. Figure 706.6.1(2) FIRE WALLS—STEPPED BUILDINGS 1 -HOUR-RATED EXTERIOR WALL FIRE WALL 2015 INTERNATIONAL BUILDING CODEe COMMENTARY 7-37 FIRE AND SMOKE PROTECTION FEATURES 706.6.2 Buildings with sloped roofs. Where a fire wall serves as an interior wall for a building, and the roof on one side or both sides of the fire wall slopes toward the fire wall at a slope greater than two units vertical in 12 units horizontal (2:12), the fire wall shall extend to a height equal to the height of the roof located 4 feet (1219 mm) from the f re wall plus 30 inches (762 mm). In no case shall the extension of the fire wall be less than 30 inches (762 mm). +This requirement is similar to that of stepped build- ings. This section only applies if the roof slopes upward away from the fire wall at a slope greater than two units vertical in 12 units horizontal (2:12). The sloping roof presents a greater hazard to the building from fire exposure on either side than a roof at the same elevation on each side. The hazard would increase as the slope of the roof increases. Commen- tary Figure 706.6.2 illustrates this requirement. This section requires the extension above the roof regard- less of the material of the roof construction on either side. For roofs sloping two units vertical in 12 units horizontal (2:12), fire wall extensions need only com- ply with Section 706.6. Section 706.6 may require a 30- inch (762 mm) height extension or may allow the fire wall to terminate at the roof deck under the condi- tions of one of the exceptions in Section 706.6. For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. -ELEVA11ON OF ROOF ®4'-0' FROM FIRE WALL Figure 706.6.2 FIRE WALL EXTENSION AT SLOPING ROOF > 2:12 UPPER ROOF NO OPENING PROTECTIVES REQUIRED LOWER ROOF For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. --0-HOUR-RATED EXTERIOR WALL FIRE WALL TERMINATING AT UNDERSIDE OF 1 -HOUR -RATED ROOF DECK 1 -HOUR -RATED ROOF CONSTRUCTION (INCLUDING ROOF STRUCTURE AND SUPPQRTI NG ELEMENTS) Figure 706.6.1(3) FIRE WALLS—EXTENSION EXCEPTION 7-38 2015 INTERNATIONAL BUILDING CODE®COMMENTARY 706.7 Combustible framing in fire walls. Adjacent combus- tible members entering into a concrete or masonry fire wall from opposite sides shall not have less than a 4 -inch (102 mm) distance between embedded ends. Where combustible members frame into hollow walls or walls of hollow units, hollow spaces shall be solidly filled for the full thickness of the wall and for a distance not less than 4 inches (102 mm) above, below and between the structural members, with non- combustible materials approved for fireblocking. ❖ In order to retain the fire -resistance capability of the wall where combustible members will frame into it, hollow walls or walls of hollow units must be solidly filled for the thickness of the wall and for a distance of not Tess than 4 inches (102 mm) above, below and between the structural members. Consistent with the construction of the walls, the firebiocking materials are to be noncombustible and approved for fireblock- ing in accordance with Section 717.2. If combustible members enter both sides of a fire wall, there must be at least 4 inches (102 mm) of masonry between the embedded ends. In order to maintain structural integrity where wood beams or joists are supported in and on masonry fire walls, the joists and beams should be shaped so that they can rotate out of the pocket without exerting undue force on the wall. 706.8 Openings. Each opening through a fire wall shall be protected in accordance with Section 716.5 and shall not exceed 156 square feet (15 m2). The aggregate width of open- ings at any floor level shall not exceed 25 percent of the length of the wall. Exceptions: 1. Openings are not permitted in party walls con- structed in accordance with Section 706.1.1. 2. Openings shall not be limited to 156 square feet (15 m2) where both buildings are equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1. + In order to maintain the integrity of the fire wall, the maximum area and percent of openings in the wall are restricted. When provided, the openings must be properly protected so that the fire -resistance rating of the wall is maintained. This section prescribes the maximum area and the percent of openings that may be permitted in a fire wall at any one floor level. The provisions must be used in concert with Section 706.1.1, which limits openings for party walls. Fire wall openings have restrictive limitations in their size and total area because of the critical func- tion that a fire wall serves. To maintain the required fire performance of the fire wall, each opening through a fire wall is restricted in area to 156 square feet (11 m2) and the aggregate width of all openings at any one floor level may not constitute more than 25 percent of the length of the wall. The 156 -square -foot (11 m2) limitation provides a reasonable size through r'InE AND SMOKE PROTECTION FEATURES which industrial machinery may pass and corre- sponds with the maximum area limitations of many tested fire doors. Recognizing the effectiveness of automatic sprin- klers, the 156 -square -foot (11 m2) opening limitation does not apply where the buildings on both sides of the fire wall are fully sprinklered (see Exception 2); however, the aggregate width of all openings in a fire wall at any one floor level is still limited to 25 percent of the length of the wall. 706.9 Penetrations. Penetrations of fire walls shall comply with Section 714. ❖ In order to maintain the integrity of the required fire - resistance rating, penetrations through the fire wall must be properly protected. Acceptable protection methods for various penetrations of fire walls are identified in Sections 714.2 and 714.3. 706.10 Joints. Joints made in or between fire walls shall comply with Section 715. ❖Joints, such as expansion or seismic, are another form of openings in fire walls and, therefore, must be considered with regard to maintaining the fire -resis- tance ratings of fire walls. This section requires all joints that are located in fire walls to be protected by a joint system with a fire -resistance rating and to com- ply with the requirements of Section 715. 706.11 Ducts and air transfer openings. Ducts and air transfer openings shall not penetrate fire walls. Exception: Penetrations by ducts and air transfer openings of fire walls that are not on a lot line shall be allowed pro- vided the penetrations comply with Section 717. The size and aggregate width of all openings shall not exceed the limitations of Section 706.8. ❖ The general provisions of this section mirror those of Section 706.1.1 for party walls. The exception per- mits duct and transfer openings for fire walls not located on a lot line, provided the maximum aggre- gate area provisions of Section 706.8 are met and that the openings are protected in accordance with Section 717. SECTION 707 FIRE BARRIERS 707.1 General. Fire barriers installed as required elsewhere in this code or the International Fire Code shall comply with this section. ❖The provisions of this section apply to assemblies that are required to have a fire -resistance rating and are required to be constructed as "fire barriers." As addressed in Section 707.3, fire barriers are used for separating exits, incidental use areas, shafts, hazard- ous materials control areas and fire areas. Fire barri- ers providt a higher degree of protection than fire partitions (see Section 708), but lack the inherent 2015 INTERNATIONAL BUILDING CODE®COMMENTARY 7-39 FIRE AND SMOKE PROTECTION FEATURES TABLE 716.5 OPENING FIRE PROTECTION ASSEMBLIES, RATINGS AND MARKINGS TYPE OF ASSEMBLY Fire walls and lire barriers having a required lire -resis- tance rating greater than 1 hour Enclosures for shafts, interior exit stairways and inte- rior exit ramps. Horizontal exits in lire walls` Fire harriers hav- ing a required fire - resistance rating of 1 hour: Enclosures for shafts, exit access stairways. exit ac- cess ramps, inte- rior exit stairways and interior exit ramps: and exit passageway walls Other fire harriers Fire partitions: Corridor walls Other [ire partitions 140 REQUIRED WALL ASSEMBLY RATING (hours) 4 MINIMUM FIRE DOOR AND FIRE SHUTTER ASSEMBLY RATING (hours) 3 2 4 3 0.5 0.5 3 DOOR VISION PANEL SIZEb FIRE -RATED GLAZING MARKING " DOOR VISION PANEL° Fire protection MINIMUM SIDELIGHT/ TRANSOM ASSEMBLY RATING (hours) FIRE -RATED GLAZING MARKING SIDELIGHT(TRANSOM PANEL Fire resistance Fire protection Fire resistance Sec Note h D -H -W-240 Not Permitted 4 Not Permitted 1V-240 3' See Note h 111, 100 sq. in. 1'1 3 3° 1/.3h 100 sq. in. 100 sq. in. 100 sq. in. 100 sq. in. 100 sq. in.`. Maximum size tested Maximum size tested Maximum size tested Maxiinunl size tested Maximum size tested D -1 -I -W-180 5100 sq. in. = D -H-00 >100 sq. in.= D -H -W-90 Not Permitted Not Permitted 100 sq. in. = D -I1-90 >100 sq. in.= Not Permitted D -1i -W-90 100 sq. in. = D -I-1-90 > 100 sq. in.= Not Permitted D -H -T -W-90 =.100 sq. in. = D -H-180 > 100 sq. in.= Not Permitted D -H -W-240 < 100 sq. 111. = D-11- 1 80 > 100 sq. in.= D -1-1-1V- 180 5100 sq. in. = D -H-60 >100 sq. in.= D -H -1'-W-60 D -H D-20 D-20 I) -I-1-45 D -I.1-20 (co llr,Nted) Not Permitted Not Permitted Fire protection 1� 3 2 2 4 3 Nut Permitted Not Permitted Not Permitted Not Permitted Not Permitted Not Permitted Not Permitted W-180 W-120 W-90 W-120 W-240 W -I80 Ll -H D -H -OH -45 1) -I1 -O1-1-20 D -I 1-45 D-11-20 W-60 2015 INTERNATIONAL BUILDING CODE" Spring Born/Silt Farms Greenhouse & Technical Buildings Review of Amended Architectural Plans Submitted by Kraii Design Architecture (KDA) Permit Number: BLCO-10-19-6020 Reviewed By: Dave Argo, Plans Examiner— Garfield County Building Department Review Date: March 30, 2020 PLAN REVIEW MEMO: Interim Plan Review Comments ✓A. Fire Wall between Buildings — The 2 -hour fire wall as shown on plans and details does not comply with the specific characteristics and requirements of a "Fire Wall" as described in I.B.C., Section 706 including the following items: 1. Structural Stability— Section 706.2 2. Horizontal Continuity — Section 706.2 3. Vertical Continuity — Section 706.6 4. Sloped Buildings — Section 706.6 5. Opening Protectives — Section 706.8 Please refer to the PDF attachment taken from the I.B.C. Code/Commentary which explains each of these sections in greater detail — including explanatory diagrams —than found in the building code. To best serve the primary functions of fire control and structural independence between separate buildings, perhaps the fire wall should literally be built in between these two buildings — especially since both structures are pre -fabricated steel buildings that are supplied by different manufacturers. Site built construction of the fire wall can be completed after the initial building is set in place, and after the fire wall has been built the second structure can then be erected. Openings between the structures are allowed within the fire wall itself, but they must be 90 -minute fire rated assemblies (*Note: the two overhead doors shown on plans and in door schedule do not comply with these requirements). This approach to building the fire wall in between steel buildings offers simplicity of construction detailing and constructability in fulfilling items #1-4 as noted above, although some minor changes to existing design are required. Action Required: As currently detailed and specified on Sheet A3.11 your cited exceptions to these provisions (horizontal continuity, vertical continuity and opening protectives) do not apply to this project and all requirements of the 2 -hour fire wall need to be addressed. Since current configuration and detailing of the 2 -hour fire wall does not comply with specific building code requirements, as described above, we will need to be provided with another alternative or additional information demonstrating compliance with this critical aspect of building design before we can approve for building permit issuance. %B. Construction Assemblies —There is not enough information contained in the cross-section drawing (Detail 1/Sheet A3.10) to properly illustrate just how floor/wall/ceiling assemblies are to maintain required fire ratings — see attached redlines. Action Required: Provide additional details and/or cut sheets from U.L. or U.S.G.A. substantiating how these fire assemblies will be constructed. Please consider submitting an additional transverse cross section view of the upstairs office mezzanine overlooking the F-2 occupancy below, including windows. VC. Fire Sprinkler Heads at Window Openings — Although you had sent me some information about using wet sprinkler head to wash down windows located within fire rated wall assemblies, I doli't see anything on drawings to indicate where this may occur. Action Required: Can you provide us with additional information? Or has this idea now been dropped? v6. Exterior Elevations — Will you be including the (5) sheets of exterior elevations of these buildings as previously submitted to our office (or otherwise updated versions) with your next submittal? Action Required: Our minimum requirements for any building permit include the depiction of all exterior elevations. Fire walls Chapter 5 of the IBC limits the size of buildings based on the occu- pancy classification and type of construction as discussed earlier. One option available to the designer to increase the size of a structure is to construct a "fire wall." This may allow the building to be constructed to a lower type of construction. When a fire wall is constructed in accor- dance with the IBC, each side of the structure on each side of the wall is considered a separate building (see Figure 8-7). Therefore, the size of the building can theoretically be doubled and the type of construction maintained. A fire wall can also serve as a separa- tion of occupancies or to separate different types of construction. A fire wall is the most important fire assembly in a building. [Ref. 706.1] Fire walls have specific construction requirements. The most difficult provision is the requirement for structural stability. The wall must be constructed so the buildings on each side of the wall can collapse under fire conditions in such a way that the wall is not affected. This can be done in many different ways and is left up to the designer to show how this performance-based requirement is being met. Fire walls must extend from the foundation to a point thirty inches above both adjacent roofs. They must also extend at least eighteen inches beyond the exte- rior wall of the buildings. The IBC provides specific exceptions for both the vertical and horizontal conti- nuity of the wall. [Ref. 706.2 and 706.5] . VI LVI 1]1.1U41.14./1 I. FIGURE 8-7 A fire wall creates two separated buildings Fire walls must be fire -resistance rated in accordance with Table 8-5. The rating is based on the occupancy classifications in the building. Fire walls must be constructed of noncombustible materials unless the build- ing is of Type V construction. The openings in a fire wall are limited to 156 square feet in buildings without a fire sprinkler system, and they are limited to 25 percent of the length of the fire wall. The openings must be protected with a fire -rated door or shutter assembly as shown in Table 8-5. Doors must close by themselves or be automatic closing. They must also latch when closed. Ducts and air transfer openings must be protected with a fire damper. Fire walls that are located on lot lines are called party walls and are not permitted to have any openings. TABLE 8-5 Fire wall ratings and opening ratings (Based on IBC Table 706.4 & 715 4) Group A, B, E, H-4, I, R-1, R-2, U F-1, H -3b, H-5, M, S-1 H-1, H-2 F-2, S-2, R-3, R-4 Fire resistance rating (hours) 3' 3 4" 2 Opening rating 3 3c 3 1/ a. In Type II and V construction, walls shall be permitted to have e 9 -hour fire -resistance rating with 1 '/s hour openings. b. For Group H-1, H-2, or H-3 buildings, also see Sections 415.4 and 415.5. c. Two doors, each with a Fire protection rating of 11/2 hours, ,rstalled an opposite sides of the same opening in a fire wall, shall be deemed equivalent in fire wntectinn rating *one 3 -hour fire door, 3 �1Glithu I J raxut» 1 FL 1 CX' lira nail/MO 1 [;GFlgtrvid+bvi A*444 611pd.fi.i 04 'AO isfetivt PA 015 CX, Construction Construction Assembly Details & New Building Section Cut 0 swt1 5 fief cwt. 3 ENLARGED OFFICE SECOND FLOOR •m,•'' U4" = I'-0" Dave Argo From: Dave Argo Sent: Tuesday, March 31, 2020 12:35 PM To: 'Eric Kraai' Cc: Andy Schwaller (aschwaller@garfield-county.com) Subject: Spring Born/Silt Farms - Plan Review Memo 3/31/20 Attachments: Plan Review Memo 2020-03-31.pdf; Fire Walls IBC Code Commentary.pdf Eric: Please review the attached Plan Review Memo + attachments for building code issues that still need to be addressed including most significantly the 2 -Hour Fire Wall located between the two steel buildings, as well as some additional items. The "Fire Wall" issue is a critical one that simply needs to comply with all of the specific requirements of the code. Any forthcoming revisions to the "Fire Wall" configuration and detailing will obviously shape the contents of the final set of architectural plans to be submitted to our office, and it may also affect other consultants' work. If you'd like to discuss in greater detail, please give me a call. Although I'm working remotely at my home office, you can still reach me via my normal phone extension and it will ring through to me here. Dave Argo Plans Examiner Garfield C'orrnti<, Community Development Department 108 8th Street, Suite 401 Glenwood Springs, CO 81601 Tel: 970-945-8212 Ext. 1610 Email: dargo@garfield-county.com Web: garfield-county.com 1