HomeMy WebLinkAboutEngineer's Letter 06.20.2020PSB S.O NO.:
CUSTOMER:
ADDRESS:
END-USER:
JOBSITE:
COUNTY:
BUILDING END USE:
pRE�OSTEEL
BUILDINGS
5912 South Cody Street Suite # E209
Littleton, CO, 80123
(720)-476-3414
110167 -RA
Ralph Delaney
203 Haystack Rd.
Glenwood Springs, CO 81601
Ralph Delaney
131 Black Bear Rd.
Glenwood Springs, CO 81601
OTHER
To whom it may concern:
Premo Steel Buildings, certifies that the above structures were designed in accordance with the A./.S.C.
Specification for Structural Steel Buildings - Allowable Strength Design, ANSI/AISC 360-10 , the A.I.S.I. Standard,
North American Specification for Design of Cold -Formed Steel Structural Members, 2012 Edition , A.W.S. D1.1-10
Structural Welding Code - Sheet Steel and generally accepted engineering practices. Loads applied to design the
building/s are no less than the requirements prescribed in the order document and the design satisfies the
requirements of the 2015 International Building Code.
(Refer to Building Description and Design Loads on succeeding pages)
Accessories provided by others are to sustain the design wind load. Likewise, the customer is to ensure that the above
comply with the requirements of local regulatory authorities. Open web joists, if used and supplied by PSB shall be from
a Steel Joist Institute (SJI) approved manuacturer.
This Letter of Certification covers only the design of the steel building and its components. It specifically excludes
accessories, anchor bolts, foundation, masonry, or general contract work as well as erection certification.
Sincerely,
6/20/2020
Frederick J. Campana
Professional Engineer
Page 1 of 3
Continuation of PSB S.O. NO.: 110167 -RA
BUILDING DESCRIPTION
BUILDING
FRAME TYPE
WIDTH (ft)
LENGTH (ft)
EAVE HEIGHT BACK SIDEWALL (ft)
EAVE HEIGHT FRONT SIDEWALL (ft)
ROOF SLOPE BACK SIDEWALL (ft)
ROOF SLOPE FRONT SIDEWALL (ft)
BAY SPACING FROM LEFT TO RIGHT (ft)
30
• 50
14
14
3.0:12
3.0:12
2at25'
DESIGN LOADS
DESIGN CODE
ENCLOSURE
DEAD LOAD (psf)
COLLATERAL LOAD (psf)
WIND LOAD
Ultimate Wind Speed (mph)
Wind Importance Factor, Iw
Wind Exposure
Internal Pressure Coefficient, GCPi
LIVE LOAD
Primary Framing (psf)
Tributary Area Reduction
Secondary Framing (psf)
SNOW LOAD
Ground Snow Load, Pg (psf)
Roof Snow Load, Pf (psf)
Sloped Roof Snow Load, Ps (psf)
Snow Exposure Factor, Ce
Snow Importance Factor, Is
Thermal Factor, Ct
Slope Factor, Cs
SEISMIC LOAD
Seismic Importance Factor, le
Seismic Occupancy Category
Site Class
Mapped Spectral Response Acceleration
Spectral Response Coefficient
Seismic Design Category, SDC
Basic Force Resisting Systems Used
Total Design Base Shear, V (kips)
Response Modification Factors, R
Seismic Response Coefficients, Cs
Analysis Procedure Used
RAINFALL INTENSITY (inches/hr)
: IBC 15
: Partial
Building Structure Only
0.5
115
1
C
0.55 / -0.55
20
No
20
107
75
75
:1
: II
D
Page 2 of 3
Ss= 0.360 S1= 0.080
Sds= 0.363 Sd1= 0.128
C
Steel System Not Detailed
For Seismic Resistance
Rigid Frames & Braced Frames
4.78
Rigid Frames = 3
End Wall x Bracing = 0.121
Side Wall x Bracing = 3
Rigid Frames = 0.121
End Wall x Bracing = 0.121
Side Wall x Bracing = 0.121
Equivalent Lateral Force Procedure
11 = 4 12= 6
Continuation of PSB S.O. NO.: 110167 -RA
DEFLECTION LIMITS
Endwall Column 90 Purlin Wind 120 Rigid Frame Vertical 120
Endwall Rafter Live 180 Wall Panel 120 Wind Bent 60
Endwall Rafter Wind 120 Roof Panel Live 150 Rigid Frame Crane 100
Wall Girt 90 Roof Panel Wind 120 Rigid Frame Seismic 50
Purlin Live 150 Rigid Frame Horizontal 60 Wind Bent Seismic 50
CRANE LOADS
Type
Vertical Impace Factor
Rail Type
Crane 1A
Capacity (Tons)
Service Class
Bridge Weight (lbs)
Trolley Weight (lbs)
Max Wheel Load (lbs)
Wheel Base Outside (ft)
Wheel Base Inside (ft)
System A
System B System C
Crane 2A Crane 1B Crane 2B
Crane 1C Crane 2C
MEZZANINE LOADS
Mezzanine 1
Dead Load (psf)
Partition Dead Load (psf)
Collateral Load Above (psf)
Collateral Load Below (psf)
Live Load (psf)
Page 3 of 3
Mezzanine 2 Mezzanine 3