Plans (399) CT ENGINEERING
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BULLETIN
Date: January 8,2018 Number: CT-39 Project#: 15238
Project Name: River Terrace SF Attached: CT-39.1 to CT-39.4
Subject: Lot 72 (Plan 3413D)—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 72 (Plan
3413D) as requested by the Owner. Note that this deck has been added due to the grades at this
particular lot.
REVISION �,,c° N ° Zi
60
46, OREG���A' 2 2, <c
01/08/2018
CALL WITH ANY QUESTIONS
Issued by: Arnold R. Solomon Date: Jan. 8, 2018
Distribution:
Contact Information:
Ken Wilde Polygon Northwest Company
Alexia Fukui Milbrandt Architects
R:\15238 River Terrace SF\Bulletins\15238_2018.01.08_CT39_Lot 72(Plan 3413D)-Added Deck.doc
Structural Engineers
•
RIVER TERRACE SF: LOT 72 (PLAN 3413D) CT-39.3
Title: Job#
Dsgnr: Date: 3:28PM, 8 JAN 18
Description:
Scope:
Timber Beam & Joist Page 1
L lot 72(plan 3413d)-bulletin.ecw:Calculatio
Description DECK FRAMING
Timber Member Information
B1 B2 B3 84 85 B6
Timber Section 6x12 4x10 2x8 6x8 2-2x8 2-2x8
Beam Width in 5.500 3.500 1.500 5.500 3.000 3.000
Beam Depth in 11.500 9.250 7.250 7.500 7.250 7.250
Le:Unbraced Length ft 0.00 0.00 0.00 0.00 0.00 0.00
Timber Grade Douglas Fir- Douglas Fir- Hem Fir,No.2 Douglas Fir- Hem Fir,No.2 Hem Fir,No.2
Larch,No.1 Larch,No.2 Larch,No.1
Fb-Basic Allow psi 1,350.0 900.0 850.0 1,350.0 850.0 850.0
Fv-Basic Allow psi 170.0 180.0 150.0 170.0 150.0 150.0
Elastic Modulus ksi 1,600.0 1,600.0 1,300.0 1,600.0 1,300.0 1,300.0
Load Duration Factor 1.150 1.150 1.000 1.000 1.000 1.000
Member Type Sawn Sawn Sawn Sawn Sawn Sawn
Repetitive Status No No Repetitive No No No
Center Span Data
Span ft 20.50 6.00 7.00 10.25 5.00 7.00
Dead Load #/ft 68.00 150.00 13.00 35.00 40.00
Live Load #/ft 112.00 400.00 80.00 210.00 240.00
Dead Load #/ft 218.00
Live Load #/ft 212.00
Start ft
End ft 6.000
Point#1 DL lbs 100.00
LL lbs 600.00
@ X ft 4.000
[Results Ratio= 0.6029 0.8537 0.4435 0.5547 0.3917 0.5365
Mmax @ Center in-k 113.47 52.92 6.84 38.61 10.50 14.38
@ X= ft 10.25 3.00 3.50 5.12 2.50 4.00
fb:Actual psi 936.0 1,060.3 520.2 748.8 399.5 547.2
Fb:Allowable psi 1,552.5 1,242.0 1,173.0 1,350.0 1,020.0 1,020.0
Bending OK Bending OK Bending OK Bending OK Bending OK Bending OK
Tv:Actual psi 39.9 101.3 37.4 40.2 36.7 27.6
Fv:Allowable psi 195.5 207.0 150.0 170.0 150.0 150.0
Shear OK Shear OK Shear OK Shear OK Shear OK Shear OK
Reactions
@ Left End DL lbs 697.00 1,104.00 45.50 179.37 100.00 42.86
LL lbs 1,148.00 1,836.00 280.00 1,076.25 600.00 257.14
Max.DL+LL lbs 1,845.00 2,940.00 325.50 1,255.62 700.00 300.00
@ Right End DL lbs 697.00 1,104.00 45.50 179.37 100.00 57.14
LL lbs 1,148.00 1,836.00 280.00 1,076.25 600.00 342.86
Max.DL+LL lbs 1,845.00 2,940.00 325.50 1,255.62 700.00 400.00
Deflections Ratio OK Deflection OK Deflection OK Deflection OK Deflection OK Deflection OK
Center DL Defl in -0.242 -0.029 -0.011 -0.028 -0.005 -0.010
L/Defl Ratio 1,015.4 2,478.2 7,407.0 4,377.8 13,211.1 8,656.5
Center LL Defl in -0.399 -0.048 -0.070 -0.169 -0.027 -0.058
L/Defl Ratio 616.5 1,490.2 1,203.6 729.6 2,201.8 1,442.7
Center Total Defl in -0.641 -0.077 -0.081 -0.197 -0.032 -0.068
Location ft 10.250 3.000 3.500 5.125 2.500 3.640
L/Defl Ratio 383.6 930.6 1,035.4 625.4 1,887.3 1,236.6
RIVER TERRACE SF: LOT 72(PLAN 3413D) CT-39.4
Title: Job#
Dsgnr: Date: 3:50PM, 8 JAN 18
Description:
Scope:
� Page 1
L Square Footing Design lot 72(plan 3413d)-bulletin.ecw Calculatio
Description DECK PAD FTG
General Information
Dead Load 0.900 k Footing Dimension 1.500 ft
Live Load 2.600 k Thickness 10.00 in
Short Term Load 0.000 k #of Bars 2
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 6.500 in As to USE per foot of Width 0.216 in2
200/Fy 0.0033 Total As Req'd 0.324 in2
As Req'd by Analysis 0.0002 in2 Min Allow%Reinf 0.0014
Min.Reinf%to Req'd 0.0014 %
Summary Footing OK
1.50ft square x 10.Oin thick with 2-#4 bars
Max.Static Soil Pressure 1,680.56 psf Vu:Actual One-Way 0.00 psi
Allow Static Soil Pressure 2,000.00 psf Vn*Phi:Allow One-Way 85.00 psi
Max.Short Term Soil Pressure 525.00 psf Vu:Actual Two-Way 10.82 psi
Allow Short Term Soil Pressure 2,000.00 psf Vn*Phi:Allow Two-Way 170.00 psi
Alternate Rebar Selections...
Mu :Actual 0.37 k-ft/ft 2 #4's 2 #5's 1 #6's
Mn*Phi:Capacity 7.42 k-ft/ft 1 #7's 1 #8's 1 #9's 1 #10's