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Plans (52) *CT ENGINEERINGINC OFFICE 180 Nickerson St. COPY Suite 302 Seattle,WA 98109 (206)285-4512(v) (206)285-0618(F) asolomon@ctengineering.com BULLETIN Date: August 8, 2017 Number: CT-32 Project#: 15238 Project Name: River Terrace SF Attached: CT-32.1 to CT-32.3 Subject: Lot 24 (Plan 19B)—Added deck Drawings Affected: Description/Action: This bulletin provides response to RFI, design clarifications and/or variation requests for the `River Terrace SF' project located in Tigard, Oregon. Per attached plan and structural calculations, see added deck framing layout for Lot 24 (Plan 19B) as requested by the Owner. Note that this deck has been added due to the grades at this particular lot. City of Tigard Approved Plans o PRo, By Date1i. 4 ���,��G I NF�14 coe45k ) /ti<S.Sakf SREG��N& .RE VIS 7. 2 2 , c� REVISION .4FS GR��F T. 08/08/2017 CALL WITH ANY QUESTIONS Issued by: Arnold R. Solomon Date: August 8, 2017 Distribution: Contact Information: Ken Wilde Polygon Northwest Company Alexia Fukui Milbrandt Architects R:\15238 River Terrace SF\Bulletins\15238—2017.08.08—CT32—Lot 24(Plan 19B)-Added Deck.doc Structural Engineers RIVER TERRACE SF: LOT 24 (PLAN 19B) CT-32.1 " • • aD (01 let 24 K?arrr fo—,o to/(3)11 I'M' E.W . r m- m 'q4. + -� - - o3) -r � - - - -- --- ---- 11 6X6 TNTC ED 1r �A. EDGE 241 6X6 LeDGErk 5-p. ' r 'JATIO : 15 1 S 1 I ilkill N014RJ 0 © k I 0 1 e ® 70 . _ ® , Al 1 1_ 01411J j.'J UP A 1 11\1 ",-.i 'gRi IAF IT v:� -nr:� I -0.-2. ,1:•. ::::.:•. 16'sq.xt0•DEEP tivE 1 Fra W/(Z74 q H014RJ y(( DOTE EW I FlNAST ED FL�oR I, ---J 1. . (TYP.U,N.O.) Komi: • Amu! (ex RtDR To Pete W ati RclAtt Past CAP: . • RIAtsi Lot. Asir So PPDXttNG Dem RooP To 4x MDR Lotti( Ipgv€'RT b ACE Pan CARP! CT-32.2 ' ,RIVER TERRACE SF: LOT 24 (PLAN 19B) Title: Job# Dsgnr: Date: 5:48PM, 8 AUG 17 Description: Scope: Timber Beam & Joist Page 1 lot 24(plan 19b)-bulletin.ecw:Calculations Description DECK FRAMING Timber Member Information DECK JOIST DECK BEAM Timber Section 2x8 6x8 Beam Width in 1.500 5.500 Beam Depth in 7.250 7.500 Le:Unbraced Length ft 0.00 0.00 Timber Grade Hem Fir,No.2 Douglas Fir- Larch,No.1 Fb-Basic Allow psi 850.0 1,350.0 Fv-Basic Allow psi 150.0 170.0 Elastic Modulus ksi 1,300.0 1,600.0 Load Duration Factor 1.000 1.000 Member Type Sawn Sawn Repetitive Status Repetitive No Center Span Data Span ft 8.50 9.25 Dead Load #/ft 13.00 53.00 Live Load #/ft 80.00 315.00 Results Ratio= 0.6539 0.6785 Mmax @ Center in-k 10.08 47.23 @ X= ft 4.25 4.62 fb:Actual psi 767.0 916.0 Fb:Allowable psi 1,173.0 1,350.0 Bending OK Bending OK fv:Actual psi 47.1 54.0 Fv:Allowable psi 150.0 170.0 Shear OK Shear OK Reactions @ Left End DL lbs 55.25 245.12 LL lbs 340.00 1,456.87 Max.DL+LL lbs 395.25 1,702.00 @ Right End DL lbs 55.25 245.12 LL lbs 340.00 1,456.87 Max.DL+LL lbs 395.25 1,702.00 Deflections Deflection OK Deflection OK Center DL Defl in -0.025 -0.028 UDefl Ratio 4,136.9 3,933.6 Center LL Defl in -0.152 -0.168 UDefl Ratio 672.2 661.8 Center Total Defl in -0.176 -0.196 Location ft 4.250 4.625 L/Defl Ratio 578.3 566.5 } CT-32.3 . RIVED TERRACE SF: LOT 24 (PLAN 19B Title: Job# Dsgnr: Date: 5:23PM, 8 AUG 17 Description: Scope: Square Footing Design Page 1 lot 24(plan 19b)-bulletin.ecw:Calculations Description DECK PAD FTG General Information Dead Load 1.000 k Footing Dimension 2.000 ft Live Load 2.700 k Thickness 12.00 in Short Term Load 0.000 k #of Bars 3 Seismic Zone 3 Bar Size 4 Overburden Weight 0.000 psf Rebar Cover 3.250 Concrete Weight 150.00 pcf fc 2,500.0 psi LL&ST Act Separately Fy 60,000.0 psi Load Duration Factor 1.000 Column Dimension 5.50 in Allowable Soil Bearing 2,000.00 psf Reinforcing Rebar Requirement Actual Rebar"d"depth used 8.500 in As to USE per foot of Width 0.259 in2 200/Fy 0.0033 Total As Req'd 0.518 in2 As Req'd by Analysis 0.0001 in2 Min Allow%Reinf 0.0014 Min.Reinf%to Req'd 0.0014 % Summary Footing OK 2.00ft square x 12.0in thick with 3-#4 bars Max.Static Soil Pressure 1,075.00 psf Vu:Actual One-Way 1.05 psi Allow Static Soil Pressure 2,000.00 psf Vn*Phi:Allow One-Way 85.00 psi Max.Short Term Soil Pressure 400.00 psf Vu:Actual Two-Way 9.47 psi Allow Short Term Soil Pressure 2,000.00 psf Vn*Phi:Allow Two-Way 170.00 psi Alternate Rebar Selections... Mu :Actual 0.51 k-ft/ft 3 #4's 2 #5's 2 #6's Mn*Phi:Capacity 11.00 k-ft/ft 1 #7's 1 #8's 1 #9's 1 #10's