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Structural Calculations for:
MAY 2 3 2015
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Blue Nile Jewelry BUILDINGDIV DIVISION
Washington Sq Mall
Portland OR
By:
Alpesh Chavda, P.E.
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Calculation modules:
1. Storefront soffit and tenant bulkhead support
Design code and loading
Design based on Oregon Structural Specialty Code - 2014
Dead loads: 10 PSF for tenant bulkhead framing.
Live loads: 10 PSF for soffit horizontal framing.
Wind loads: 5 PSF on storefront vertical faces (internal pressure
Seismic loads based on the following parameters:
USES-Provided Output
Ss = 0,983 g SMS = 1.088 g Sas = 0.725 g
SI = 0.422 g 5M1 = 0.666 g SDI = 0.444 g
ap 1.0 (for storefront soffit/ceiling)
Rp 2.5 (for storefront e ont soffit/ceiling)
Ip 1.0
Component seismic force:
0.4apSos WI, l
P
Pp h
1l,
Wp component weight
z/h 1/2 (attachment to 2nd floor framing structure
Fp = 0.23 Wp (storefront framing)
Fpmin = 0.21 Wp (does not govern)
Seismic weight = 10 PSF
Fp = 2.3 PSF => Wind governs
Storefront Framing
3
Horizontal soffit framing at 1.44' 0.C:
Member span = 4' (maximum)
Member UDL = (5+10)(1.33') = 20 PLF
Use 3625162-43 Allowable span = 10'-4" OK
Project 'Horizontal joist at soffit
Section 1R2.. 15162 ,,,1717--- J Single NASPEC
Fy Punched I Method I Wt.
Loads and Factors
Multiplier for Strength
Dead Load 15 psi
1.0
Live Load 10 _7.1 PO 11.0 _J Deflection
Wind Load 15 psi 11_0 J 11.0 27.1
Deflection Limit Li 1360 zi
Number of Spans Web Crippling and Shear Parameters
r: One Span
r Require Web Stiffeners at Supports 7
Two Equal
( Two or More Equal E Consider Punched Near Supports ?
—Torsion Inputs
RI Include Torsion Lever Arm for Torsion to: 1Web Center 211
Allowable Ceiling Spans
Spacing of Braces(in o.c.)
Joist Spacing ,
(in o.c.) NONE j MID Pt ..1 ITHIRD Pt
112 Lr
16 zi
124
Boxed beams at front and back of soffit
(2) studs boxed with (2) tracks. Consider studs for vertical loads and tracks for
horizontal
Beam span for vertical loads = 17'
•
4
Vertical reaction from soffit framing = 30 plf
Vertical load from tenant bulkhead = (10)(4) = 40 plf (front beam only)
Total vertical load = 70 PLF
Use (2) 10005162-68 studs in boxed beam
Allowable UDL for 26' span = 201 PLF (OK)
Beam span for horizontal loads = 4' (distance between diagonal braces)
Wind reaction at boxed beam = (5)(16'/2)(4'/2) = 80 PLF
(seismic governs)
Use (2) 362T125-68 tracks in boxed beam
Allowable UDL in 4' span = 738 PLF (OK)
Boxed post
Axial load in boxed post = (70)(17'/2) = 595 Lbs
Horizontal loads transferred directly to structure via braces and does not end in
posts.
Post height = 19'
Use (2)3625162-43 (neglect contribution of tracks in boxed post)
Allowable axial load = 2993 Lbs OK
End storefront framing module