2068 Structural Calcs STRUCTURAL CALCULATIONS
FOR THE
SOUNDBUILT HOMES RESIDENTIAL PROJECT
Plan 2068
June 27, 2013
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Job No. : 04-125
Location: King County, Washington
SEGA Engineers/
Structural & Civil Consulting Engineers
22939 SE 292nd PL (360)886-1017
Black Diamond,WA 98010
Copyright 2013,SEGA Engineers
STATEMENT OF WORK
SEGA Engineers was asked to provide a lateral loads analysis, shear wall
design, review of major framing members and foundation, and drawing review for
a one-story wood framed single family residence. The roof framing is
manufactured trusses, the floor framing is 2x dimensional or wood I-joists, and
the foundation is typical concrete strip footings with a crawl space.
The attached calculations are to be used as a `basic' submittal for several
potential building sites. The cover sheet should have an original signature in blue
ink over the seal. Application and use for individual lots or sub-divisions
shall be specifically identified by separate letter for each location. The
contractor assumes all responsibility and liability for sites not expressly reviewed
and approved.
SEGA Engineers will use that degree of care and skill ordinarily exercised under
similar circumstances by members of the engineering profession in this local. No
other warranty, either expressed or implied is made in connection with our
rending of professional services. For any dispute, claim, or action arising out of
this design, SEGA Engineers shall have liability limited to the amount of the total
fee received by SEGA Engineers for this submittal.
Questions regarding the attached should be addressed to SEGA Engineers.
Greg Thesenvitz, PE
SEGA Engineers
SEGA Engineer Project Plan 2068
Structural& Civil Consulting Engineers
Job No. 04-125 By: GAT
22939 SE 292nd PL (360) 886-1017
Black Diamond, WA 98010 Checked Date: 06/27/13 Sht i
Design Criteria
International Building Code (IBC), 2012
LOADS
Roof
DL 15 psf
LL 25 psf
Floor
DL 10 psf
LL 40 psf
Wind
Risk Category II
Design Wind Speed 110 mph (V.u)
KZt 1.00
Exposure B
Seismic
Design Category D
SOS 1.00
Response Factor 6.5
Cs= 0.154
Importance Factor 1.00
Soil
Allowable Bearing 1,500 psf
Copyright 2013,SEGA Engineers
SEGA Engineers, Project sB2068
Structural&Civil Consulting Engineers
Job No. 04-125 By: GAT
22939 SE 292nd PL (360)886-1017
Black Diamond,WA 98010 Checked Date: 03/25/13 Sht 1
LOADS
ROOF
DL Roofing(Comp) 3.5 psf
'/2' OSB 1.8
2 x @ 24" 3.5
Insulation 1.1
5/a" GWB 2.8
Misc. 1.5
14.2 psf
LL Snow, Pt 25 psf (115% Load Duration)
Reduction, Cs 0.00 (Ct= 1.1, other surfaces)
5/12 pitch = 23 deg
Total Roof Load 39.2 psf
FLOOR
DL Flooring 0.5 psf
3/4" Plywood 2.3
2x10 @16" oc 2.8
5/8"GWB 2.8
Misc. 1.5
9.9 psf
LL Residential 40 psf
Total Floor Load 49.9 psf
DECKS
DL 2 x Decking 4.3 psf
2x10 @16"oc 2.8
Misc 1.5
8.6
LL Residential 40 psf
Total Deck Load 48.6 psf
WALLS
DL Siding 3.5
1/2" Plywood 1.5 psf
2x6 @16" oc 13
Insul 0.6
'/2" GWB 2.2
9.5 psf
Copyright 2013,SEGA Engineers
SEGA Engineers PROJECT S$ g
Structural & Civil Consulting Engineers
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SEGA E�Sct7�ala iers, Project Plan 2068
ivil Consulting Engineers
Job No 04-125 By: GAT
22939 SE 292nd PL (360) 886-1017
Checked Date: 06127113 Sht.
Black Diamond,WA 98010 L�
LATERAL LOADS - (Alternate ASD)
SEISMIC
Maximum Base Shear,V = F SoS W Eq. 12.14-11
R
where,
F= 1.1 Two-Story Building
SoS = 1.00 Ss= 1.5 Fa= 1.00 (Table 11.4-1, Ss> 1.25)
R= 6.5 Table 12.14-1
W= Seismic Weight
For W:
Woof= (40ft) ( 39ft ) (16 psf) + (2 ) (40ft+ 39ft) (4.Oft) (9.5 psf) = 31 kips
Wmor= (40ft) (23ft ) (14 psf) + (2 ) (40ft+ 23ft) (8.5ft) (9.5psf) = 23kips
W total = 5544 kips
Design Base Shear , V = ( .169 ) (54 kip) _ _ 9.1 kip
E = 9.1 kip_ = 6.5 kip
1.4 -- -
WIND
Design Wind Pressure, ps= X Kr p530 Eq. 28.6-1, Sect. 28.6.3
where,
= 1.00 0- 15 ft Exposure B Figure 28.6-1
= 1.00 20 ft
1.00 25 ft
Kn= 1.00 Section 26.8
P30 = 17.7 psf 110 mph Figure 28.6-1 (ASD)
Po-,5= ( 1.00 ) ( 1.00 ) (17.7 psf) = 17.70 psf (x 0.6= 10.62 psf)
P20 = ( 1.00 ) ( 1.00 ) (17.7 psf) = 17.70 psf (x 0.6= 10.62 psf)
P25 = ( 1.00 ) ( 1.00 ) (177 psf) = 17.70 psf (x 0.6= 10.62 psf)
Design Base Shear: (Wind)
Vub= ( 40ft) ( loft) (17.7 psf) + (40ft ) ( 5ft) (17.7psf)
+ ( 40ft) ( 4ft ) (17.7 psf) =13.5x0.6 =8.1 kips
Vys= ( 42ft) ( loft) (17.7 psf) + 24 ft) ( 5ft) (17.7psf)
+ ( 13ft) (4ft ) (17.7 psf) =10.5x0.6 = 6.3kips
Therefore, Wind Loads Govern for Lateral Design- Front/Back
Seismic Loads Govern for Lateral Design -Side/Side
Copyright 2013,SEGA Engineers
SEGA En ineers Project SB2068
Structural&Civil Consulting Engineers
Job No. 04-125 By: GAT
22939 SE 292nd PL (360)886-1017
Black Diamond,WA 98010 Checked Date: 05/07107 Sht. S
LATERAL LOADS -(cont'd)
Distribute Seismic Loads Over Height
Maximum Base Shear, V= 6.5 k
Fx= WX V (12.14-12)
W
Froaf= ( 31.0) (6.5 k) = 3.7 kip
( 54.0)
Fnoor= ( 23.1 ) (6.5 k) = 2.8 kip
( 54.0 )
F.= 6.5 kip
Copyright 2007,SEGA Engineers
SEGA Engineenj PROJECT S?3 mac,g
Structural & Civil Consulting Engineers
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S E GA E n g i n e e r s, PROJECT PLAN 20(o&B
structural & Civil Consulting Engineers 04-125 FIGURED BY GAT
22939 SE 292nd Place ■ Black Diamond, Washington 98010 JOB NO.
(380) 888-1017■FAX 888-1018 Q Q
CHECKED BY DATE 06121113 SHEET SOF S
SHEAR WALL KEY PLAN
ELEVATION 'B'
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UPPER FLOOR
A•1131 8Q FT
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MAIN FLOOR
A■U35 eQ FT
A.430 8Q FT
3-CAR OPTION
A■648?ti1 FT
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