HomeMy WebLinkAboutEngineer Letter Regarding Truss.n¡
M¡Tek.
MiTek USA, lnc.
MiTek USA, lnc.
400 Sunrise Avenue, Suite 270
Roseville, CA 95661
Telephone 91 6-755-3571
Re:9110
PERDUE RES.
The truss drawing(s) referenced below have been prepared by MiTek USA, Inc. under my direct supervision
based on the parameters provided by Trusfab, Inc..
Pages or sheets covered by this seal: R72864294thru R72864294
My license renewal date for the state of Colorado is October 3I,2023
September 30,2022
Hernandez, Marcos
IMPORTANT NOTE: rne seal on these truss component designs is a certification
that the engineer named is licensed ¡n the jurisdiction(s) identifìed and that the
designs comply with ANSI/TPI 1. These designs are based upon parameters
shown (e.9., loads, supports, dimensions, shapes and design codes), which were
given to MiTek or TRENCO. Any project specific information included is for MiTek's or
TRENCO's customers file reference purpose only, and was not taken into account in the
preparation of these designs. MiTek or TRENCO has not independently verified the
applicability of the design parameters or the designs for any particular building. Before use,
lhe building designer should verifo applicaÞility of design parameters and properly
incorporate these designs into the overall building design per ANSI/TPI 1, Chapter 2.
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Job
91 10 Ëî"
Truss Type
DUAL PITCH SPECIAL
Qtv
1
Plv
1
PERDUE RES.
R72864294
Sæle = 1:46.0
.lôh Rêferen.ê loÕl¡ônãl)
Trusfab lnc.
5x6 -_ 2.æFî 2-0-0
3x4 ll
3x6
FLUSHY BEAM BY OTHERS
F
2-0-0
4Xb -
4x6'-E
M N
4.oon2 2x4
c
L
d
åo
K
4x6 =
J
3x6 =
H
5Xb -3x10 ll
REPAIR: NOICH TRUSS, AS SHOWN.
LUMBER AND CONNECTOR PLATES (SHOWN DASHED) TO BE
CUT CLEANLY AND ACCURATELY AND THE REMAINING PLATE(S)
MUST BE FULLY EMBEDDED AND UNDISTURBED.
W4 wsrtttz x 4 spF/DF/sP No-2 cur ro Flr rlcHr.
+
+
++
ATTACH 1/2' PLYWOOD OR OSB GUSSET (15/32' RATED SHEATHING 32116 EXP 1)
TO EACH FACE OF TRUSS WITH (0.131'X 2.5'MIN.) NAILS PER THE FOLLOWING NAIL SCHEDULE:
2 X 3'S - 2 ROWS, 2 X 4'S - 3 ROWS, 2 X 6'5 AND LARGER - 4 ROWS: SPACED @ 4" O.C.
NAILS TO BE DRIVEN FROM BOTH FACES. STAGGER SPACING FROM FRONT TO BACK FACE
FOR A NET 2" O.C. SPACING IN EACH COVERED TRUSS IVEIMBER. USE 2' MEMBER END DISTANCE.
N
&
o
DEFL.
Vert(LL)
Vert(CT)
Hor¿(CT)
Wind(LL)
tn
-0.09
-o-20
0.0s
0.04
(loc) l/defl Ud
t-K >999 360
t-K >999 180
H n/a nla
K >999 240
SPAC|NG- 2-O-O
Plate Grip DOL 1,00
Lumber DOL 1.00
Rep Stress lncr YES
Code lRC2015/TP12014
cst.
TC
BC
WB
Matrix-S
0.55
0.52
0.93
8-1 0-13
LoADING (psf)
TCLL 40.0
(Roof Snow=40.0)
TCDL 1O.O
BCLL O.O
LUMBER.
TOP CHORD 2x6 DF2100F l.8E
BOTCHORD 2x4SPF2l00F 1.8E
WEBS 2x4 WW Stud *Except*
E-K,F-H: 2x4 SPF 21 00F I .8E
WEDGE
Left: 2x4 WW Stud
PLATES
MT2O
GRIP
169t123
10
Weight: 122 lb FÏ = 2oo/o
Structuralwood sheathing directly applied or 5-8-9 oc purlins,
except end verticals.
Rigid ceiling directly applied o|t0-0-0 oc bracing.
BRACING.
TOP CHORD
BOT CHORD
REACTIONS.(size) 8=0-5-8,H=0-7-0
Max Hoz B=189(LC 13)
Max Uplift B=-272(Lc 1a), H=-131(LC 1a)
Max Grav B=1 731 (LC 31 ), H=1 352(LC 1 )
FORCES. (lb) - Max. Comp./Max. Ten. - All forces 250 (lb) or less except when shown.
TOP CHORD B-C=-26531247, C-E=-257 1 1331, E-F=-1 098/21 0, G-H=-394/1 07
BOT CHORD B-K=-36812332, lK=-2541 1393, H-l=-1 85/1 023
WEBS C-K=-736/191,E-K=-151l1396,El=-8061142,F)=421865,F-H=-'14481209
NOTES.
1) Wind: ASCE 7-10; Vult=115mph Vasd=91mph; TCDL=s.opst BCDL=5.0psÍ n=25ft;845ft; L=24ft'eave=4ft'Cat. ll; Exp C;
Enclosedi MWFRS (directional) and C-C Exterio(2) -3-0-14 to -0-0-14, lnterior(1) -0-0-14 to 17-5-4, Exterio(2) 17-54to20-54,
lnterior(1 ) 20-54 fo 23-1-13 zone; cantilever left and right exposed ; end vertical lefi and right exposedic-C for members and forces
& MWFRS for reactions shown; Lumbe¡ DOL=1 .33 platè grip DOL=1-33
2) TCLL: ASCE 7-10; PÊ40.0 psf (flat roof snow); Category ll; Exp C; Fully Exp'; Ct=1.00
3) Unbalanced snow loads have been cons¡dered for this design.
4) This truss has been designed for greater of min roof live load of '16.0 psf or 2.00 times flat roof load of 40.0 psf on overhangs
nôn-concunent with other live loads.
5) This truss has been designed for a 10.0 psf bottom chord live load nonconcunent w¡th any other live loads.
6) " This truss has been designed for a live load of 20.0psf on the bottom chord in all areas where a rectangle 3-6-0 tall by 2-0-0 wide
will fit between the bottom chord and any other members.
7) Pfovide mechanical connection (by others) of truss to bearing plate capãble of withstanding 272\b uplift at joint B and 131 lb uplift at
joint H.
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September 30,2022
.,! , Wnnrulrue - Veriû dosign parareteß and RÉAD NOIES ON THIS AND INCLUDEÐ MITEK REFERENCE PAGE Mll-7473 rov. 5/1912020 BEFORE USE.
Design valid for use only with M¡Tek@ ænnectoE- Th¡s design is based only upon parameters shown, and is for an ìnd¡v¡dual bu¡lding @mponent, not
a truðs syslem. Belore úse, the bu¡lding des¡gner must ver¡fy the appticability ofdesign parameters and properly in@rporate this design into the oveEll
buitding ¿esign. Bracing indi@ted is to prevãnt buckling of individual truss web and/or chord members only. Add¡tional temporary and pemanent bEdng
is always required for stãb¡l¡ty and to prev€nt collapse t¡lh poss¡ble peßonal injury and property damage. For general gu¡danæ regard¡ng the
fabricai¡on, storage, doliv€ry, orect¡on ãnd brac¡ng oftrusses and truss systèms, sæ ANSffPll Sua,fty Cdterld, DSB-89 and BCSi Build¡ng Component
Salaty Infomation available from Truss P¡ate lnst¡tute, 2670 Craìn H¡ghway. Su¡te 203 Waldorf, MD 20601
rall
lTttl:r.:ìi'r; r.
M¡Tek USA, lnc.
400 Sunr¡se Avenue, Su¡te 270
SymbolsPLATE LOCATION AND ORIENTATION11;Center plate on joint unless x, yoffsets are indicated.Dimensions are in ft-in-sixteenths.Apply plates to both sides of trussand fully embed teeth.0-16'For 4 x2 orientation, locateplates 0- 1t6" from outsideedge of truss.This symbol indicates therequired direction of slots inconnector plates.* Plate location details available in MiTek 20/20software or upon request.PLATE S¡ZE4x4The first dimension is the platewidth measured perpendicularto slots. Second dimension isthe length parallel to slots.LATERAL BRACING LOCATIONlndicated by symbol shown and/orby text in the bracing section of theoutput, Use T or I bracingif indicated.BEARINGlndicates location where bearings(supports) occur. lcons vary butreaction section indicates jointnumber where bearings occur.Min size shown is for crushing onlylndustry Standards:ANSI/TPI1: National Design Specification for MetalPlate Connected Wood Truss Construction.DSB-89: Design Standard for Bracing.BCSI: Building Component Safety lnformation,Guide to Good Practice for Handling,lnstalling & Bracing of Metal PlateConnected Wood Trusses.TIMiTek.'Í¡MiTek Engineering Reference Sheet: Mll-7473 rev. 51191202QIBOTÏOM CHORDS76JOINTS ARE GENERALLY NUMBERED/LETTERED CLOCKWISEAROUND THE TRUSS STARTING AT THE JOINT FARTHEST TOTHE LEFI.CHORDS AND WEBS ARE IDENTIFIED BY END JOINTNUMBERS/LETTERS,PRODUCT CODE APPROVALSICC-ES Reports:ESR-r31 1, ESR-1352, ESR1988ER-3907, ESR-2362, ESR-l 397, ESR-3282Trusses are designed for wind loads in the plane of thetruss unless othenrise shown.Lumber design values are in accordance with ANSUTPI 1section 6.3 These truss designs rely on lumber valuesestablished by others.@2012 MiTek@All Rights ReservedNumbering System16-4-82TOP CHORDSdimensions shown ¡n ft-in-sixteenths(Drawings not to scale)34oÉ.oIOo-oÞoÉ.oIC)o-oF5oÈÈ4. Provide copies of this truss design to the buildingdesigner, erectìon supervisor, property owner andall other interested parties.5. Cut members to bear tightly against each other.6. Place pletes on each face oftruss at eachjo¡nt and embed fully. Knots and wane ai jo¡ntlocations are regulated by ANSI/TPl f .7. Design assumes trusses will be suitably protected fromthe environment in accord with ANSIiTPI 1.8. Unless otheMise noted, moisture content of lumbershall not exceed 19% at t¡me offabrication.9. Unless expressly noted, this design is not applicable foruse with fire retardant, preservative treated, or green lumber10. Camber is a non-structural consideration and is theresponsibility of truss fabricalor. General practice is tocamber for dead load deflection.I 1. Plate type, size, orientation and location dimensionsindlcated are minimum plating requirements.12. Lumber used shall be of the spec¡es and size, andin all respects, êqual to or bêttêr than thatspecified.13. Top chords must be sheathed or purlins provided atspacing indicated on design.14. Bottom chords require lateral bracing at 10 ft. spacing,or less, if no cèiling is installed, unless otherwise noted.I 5. Connections not shown are the responsibil¡ty of others.'16. Do not cut or alter truss member or plate without priorapproval of an engineer.17. lnstall and load vertically unless indicated otherwise.18. Use ofgreen or treated lumber may pose unacceptableenvironmental, health or performance r¡sks. Consult withproject engineer before use.19. Review all portions of this design (front, back, wordsand pictures) before use. Reviewing pictures aloneis not sufficient.20. Des¡gn assumes manufacture ¡n accordance withANSI/TPI 1 Quality Criteria.21.The des¡gn does not take into account any dynamicor other loads other than those expressly stated.A General Safety NotesFailure to Follow Could Cause PropertyDamage or Personal lnjury1. Additional stability bracing for truss system, e.g.diagonal or X-bracing, is always requ¡red. See BCSI.2. Truss bracing must be designed by an engineer. Forwide truss spacing, individual lateral braces themselvesmay require bracing, or alternat¡ve Tor Ibracing should be cons¡dered.3. Never exceed thestack materials ondesign loading shown and neverinadequately braced trusses.