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Report (2) 7 t/9 ski ' C T ENGINEERING N C 180 Nickerson St. ISuite 302 Seattle,WA 98109 (206)285-4512(V) (206)285-0618(F) asolomon@ctengineering.com BULLETIN Date: March 15, 2022 Number: CT-04 Project#: 20121 Project Name: River Terrace 1B/3C Rowhouses Attached: CT-04.1 to CT-04.3 Subject: Building 6- Lot 31 (Unit G20)—Damaged Roof Truss (J03) Drawings Affected: Sheet F3 (Roof Framing Plan) Description/Action: This bulletin provides response to RFI, design clarifications and/or variation requests for the `River Terrace 1 B/3C Rowhouses' project located in Tigard, Oregon. Per our discussion with Taylor Morrison, it's our understanding that for the bldg/lot/unit type noted above, one of the J03 roof trusses was cut in two locations. See attached pages (CT-04.1 to CT- 04.3) provided by Pacific Lumber for the required truss repair. 0-V PROF �� I N4-,swit, L �:YG\ , ►iGON q F. 129'b' 4 03/15/2022 CALL WITH ANY QUESTIONS Issued by: Arnold R. Solomon Date: March 15, 2022 Distribution: Contact Information: Dennis Gaudreault Taylor Morrison Frank Sandoval Taylor Morrison Sam Scott Taylor Morrison Amy Russell Taylor Morrison Elizabeth Erlandson Milbrandt Architects M:\20121 River Terrace 1 B-3C Rowhouses(Taylor Morrison)\Bulletins\20121_2022.03.15_CT04_Bldg 6(Lot 31)_Unit G20_Damaged Roof Truss(J03).doc Structural Engineers CT-04.1 11111 MiTek MiTek USA, Inc. 250 Klug Circle Corona, CA 92880 951-245-9525 Re: 23579 POLYGON-1B/3C RT BLDG 6 The truss drawing(s)referenced below have been prepared by MiTek USA,Inc.under my direct supervision based on the parameters provided by Pacific Lumber&Truss Co.. Pages or sheets covered by this seal: K11391328 thru K11391328 My license renewal date for the state of Oregon is December 31,2023. ��5 NGINEc9 9 89200PE OREGON 44,� MY 14,20 � ERRILk- ,06‘204eirmaltera..... • March 15,2022 Baxter,David IMPORTANT NOTE:The seal on these truss component designs is a certification that the engineer named is licensed in the jurisdiction(s)identified and that the designs comply with ANSI/TPI 1. These designs are based upon parameters shown(e.g.,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, the building designer should verify applicability of design parameters and properly incorporate these designs into the overall building design per ANSI/TPI 1,Chapter 2. 3M Job Truss Truss Type Qty Ply POLYGON-1 B/3C RT BLDG 6 K11391328 23579 J03 MONO TRUSS 12 1 Job Reference(optional) Pacific Lumber&Truss Co., Lake Oswego,OR-97035, 8.240 s Mar 9 2020 MiTek Industries,Inc. Mon Mar 14 09:29:25 2022 Page 1 1 0-0 I 4�0 I ID:3Zfim8ynuOMp?m4SBQX7RPyntcR-ZC3afVpBXrSvLvpKvuGZxvJIR5FwdnD8kcfa3Izb3Cu 1-0-0 4-6-0 i d Scale=1:25.3 CUT MEMBER 3 '' 1.5x4 I I , // REPAIR:MEMBERS CUT AS SHOWN. 10.00 12 / /// APPLY 2 X 4 X 3'MIN.DF NO.2 SCAB TO ONE FACE OF TRUSS CENTERED A%� ON DAMAGE/SPLICE OR AS SHOWN.ATTACH WITH(0.131"X 3")NAILS PER THE FOLLOWING NAIL SCHEDULE:2 x 3'S-1 ROW,2 x 4'S-2 ROWS, 2 x 6'S AND LARGER-3 ROWS:SPACED @ 2"O.C.USE 2"MEMBER END DISTANCE. AV'AO ►/ 1 / 8 ./ 1.5x4 I1 5 3x4= CUT MEMBER t 1-0-0 t 4-6-0 4-6-0 Plate Offsets(X,Y)-- (2:0-2-1,0-1-8) LOADING (psf) SPACING- 2-0-0 CSI. DEFL. in (loc) I/deft L/d PLATES GRIP TCLL 25.0 Plate Grip DOL 1.15 TC 0.26 Vert(LL) -0.01 6-9 >999 360 MT20 220/195 (Roof Snow=25.0) Lumber DOL 1.15 BC 0.13 Vert(CT) -0.03 6-9 >999 180 TCDL 7.0 Rep Stress Incr YES WB 0.00 Horz(CT) 0.00 2 n/a n/a BCLL 0.0 Code IBC20181TP12014 Matrix-MP Wind(LL) 0.02 6-9 >999 240 Weight:21 lb FT=20% BCDL 10.0 LUMBER- BRACING- TOP CHORD 2x4 DF No.1&Btr TOP CHORD Structural wood sheathing directly applied or 4-6-0 oc purlins, BOT CHORD 2x4 DF No.1&Btr except end verticals. WEBS 2x4 DF Stud/Std BOT CHORD Rigid ceiling directly applied or 10-0-0 oc bracing. REACTIONS. (size) 2=0-5-8,6=Mechanical Max Horz 2=141(LC 11) Max Uplift 2=-25(LC 12),6=-64(LC 12) Max Gray 2=248(LC 1),6=212(LC 20) FORCES. (lb)-Max.Comp./Max.Ten.-All forces 250(lb)or less except when shown. NOTES- 1)Wind:ASCE 7-16;Vult=120mph(3-second gust)Vasd=95mph;TCDL=4.2psf;BCDL=6.0psf;h=40ft;Cat.II;Exp B;Enclosed; MWFRS(envelope)gable end zone and C-C Exterior(2E)-1-0-0 to 2-0-0,Interior(1)2-0-0 to 4-6-0 zone;cantilever left and right exposed;end vertical left and right exposed;C-C for members and forces&MWFRS for reactions shown;Lumber DOL=1.60 plate grip DOL=1.60 2)TCLL:ASCE 7-16;Pf=25.0 psf(Lum DOL=1.15 Plate DOL=1.15);Is=1.0;Rough Cat B;Partially Exp.;Ce=1.0;Cs=1.00;Ct=1.10 3)This truss has been designed for greater of min roof live load of 14.0 psf or 1.00 times flat roof load of 25.0 psf on overhangs non-concurrent with other live loads. 4)This truss has been designed for a 10.0 psf bottom chord live load nonconcurrent with any other live loads. 5)*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 `D PROF will fit between the bottom chord and any other members. , '4 FsSQ 6)Refer to girder(s)for truss to truss connections. I N EF n n /fj / 7)Provide mechanical connection(by others)of truss to bearing plate capable of withstanding 25 lb uplift at joint 2 and 64 lb uplift at NG joint 6. T -S7 8)This truss is designed in accordance with the 2018 International Building Code section 2306.1 and referenced standard ANSIITPI 1. • 89200PE 7.���: y OREGON �� G<0 AlY142° +� MERR 10- RENEWAL DATE: 12-31-2023 March 15,2022 h iimimi ®WARNING-Verify design parameters and READ NOTES ON THIS AND INCLUDED MITEK REFERENCE PAGE MII-7473 rev.5/19/2020 BEFORE USE. Design valid for use only with MiTek®connectors.This design is based only upon parameters shown,and is for an individual building component,notlilt a truss system.Before use,the building designer must verify the applicability of design parameters and properly incorporate this design into the overall building design. Bracing indicated is to prevent buckling of individual truss web and/or chord members only.Additional temporary and permanent bracing M iTek is always required for stability and to prevent collapse with possible personal injury and properly damage. For general guidance regarding the fabrication,storage,delivery,erection and bracing of trusses and truss systems,see ANSIITPI1 Quality Criteria,DSB-89 and BCSI Building Component 250 Klug Circle Safety Information available from Truss Plate Institute,2670 Crain Highway,Suite 203 Waldorf,MD 20601 Corona,CA 92880 F- M Symbols Numbering System A General Safety Notes PLATE LOCATION AND ORIENTATION 6-4-8 dimensions shown in ft-in-sixteenths Failure to Follow Could Cause Property 1 3/4' Center plate on joint unless x,y offsets are indicated. I (Drawings not to scale) Damage or Personal Injury r_—= Dimensions are in ft-in-sixteenths. 1. Additional stability bracing for truss system,e.g. �� Apply plates to both sides of truss 1 2 3 diagonal or X-bracing,is always required. See BCSI. and fully embed teeth. TOP CHORDS 2. Truss bracing must be designed by an engineer.For 1/ rr wide truss spacing,individual lateral braces themselves U' 16 b may require bracing,or alternative Tor I bracing should be considered. p 3. Never exceed the design loading shown and never = stack materials on inadequately braced trusses. U U 4. Provide copies of this truss design to the building designer,erection supervisor,property owner and For 4 x 2 orientation, locate C7-8 C6-7 C5-6 I— all other interested parties. plates 0- 1,16"from outside BOTTOM CHORDS 5. Cut members to bear tightly against each other. edge of truss. 8 7 6 5 6. Place plates on each face of truss at each joint and embed fully.Knots and wane at joint — This symbol indicates the JOINTS ARE GENERALLY NUMBERED/LETTERED CLOCKWISE locations are regulated byANSI/TPI 1. required direction of slots in AROUND THE TRUSS STARTING AT THE JOINT FARTHEST TO 7 Design assumes trusses will be suitably protected from connector plates. THE LEFT. the environment in accord with ANSI/TPI 1. *Plate location details available in MiTek 20/20 CHORDS AND WEBS ARE IDENTIFIED BY END JOINT 8. Unless otherwise noted,moisture content of lumber software or upon request. NUMBERS/LETTERS. shall not exceed 19%at time of fabrication. 9. Unless expressly noted,this design is not applicable for PRODUCT CODE APPROVALS use with fire retardant,preservative treated,or green lumber. PLATE SIZE ICC-ES Reports: 10.Camber is a non-structural consideration and is the The first dimension is the plate responsibility of truss fabricator.General practice is to 4 x 4 width measured perpendicular ESR-1311, ESR-1352, ESR1988 camber for dead load deflection. to slots. Second dimension is ER-3907, ESR-2362, ESR-1397, ESR-3282 11.Plate type,size,orientation and location dimensions the length parallel to slots. indicated are minimum plating requirements. LATERAL BRACING LOCATION 12.Lumber used shall be of the species and size,and in all respects,equal to or better than that specified. P Indicated by symbol shown and/or Trusses are designed for wind loads in the plane of the 13.Top chords must be sheathed or purlins provided at by text in the bracing section of the truss unless otherwise shown. spacing indicated on design. output. Use T or I bracing 14.Bottom chords require lateral bracing at 10 ft.spacing, if indicated. Lumber design values are in accordance with ANSI/TPI 1 or less,if no ceiling is installed,unless otherwise noted. section 6.3 These truss designs rely on lumber values BEARING established by others. 15.Connections not shown are the responsibility of others. II 16.Do not cut or alter truss member or plate without prior Indicates location where bearings approval of an engineer. (supports)occur. Icons vary but ©2012 MiTek®All Rights Reserved *IMMO reaction section indicates joint 17.Install and load vertically unless indicated otherwise. 111111111111 El number where bearings occur. 18.Use of green or treated lumber may pose unacceptable Min size shown is for crushing only. NM EN,# environmental,health or performance risks.Consult with _/ project engineer before use. Industry Standards: 19.Review all portions of this design(front,back,words ANSI/TPI1: National Design Specification for Metal Miland pictures)before use.Reviewing pictures alone is not sufficient. - Plate Connected Wood Truss Construction. DSB-89: Design Standard for Bracing. mrTekg 20 Design assumes manufacture in accordance with BCSI: Building Component Safety Information, ANSI/1-P'1 Quality Criteria. Guide to Good Practice for Handling, 21.The design does not take into account any dynamic Installing&Bracing of Metal Plate or other loads other than those expressly stated. Connected Wood Trusses. MiTek Engineering Reference Sheet: MII-7473 rev.5/19/2020