Report (63) I?lcrao,7- aO
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ALAN MASCORD DESIGN ASSOCIATES, INC.
December 21, 2017
To: David Dehartport
Four D Construction
Re: Mascord plan 22162 - Four D Construction
Bedroom 2 floor joists.
Floor joists under Bedroom 2 were noted with 12" o.c. spacing on the
plans. Using a 30 live load in the sleeping area per ORSC the floor joists
may be spaced at 16" o.c. See provided bedroom floor joist calculation
for verification.
Please contact me with questions or comments.
Thank you,
atal/'James Rowell
Plan Support
2187 NW Reed Street,Suite 100
Portland,Oregon 97210
503/225-9161
www.mascord.com
Project:22162 FOUR D CONST
I.* lie
Location: BR#2 floor joists @16"0/C
James Rowell 110
page
Floor Joist Alan Mascord Design
2187
[2015 International Residential Code(2015 NOS)] nd, Reed St, Suite 100
1.5 IN x 11.25 IN x 18.5 FT @ 16 O.C. OR 97210 or
Portland,
#2-Douglas-Fir-Larch-Dry Use StruCaic Version 10.0.1.6 12/21/2017 9:27:03 AM
Section Adequate By: 12.6%
Controlling Factor: Moment
DEFLECTIONS Center
Live Load 0.29 IN U756 LOADING DIAGRAM
Dead Load 0.09 in
Total Load 0.38 IN U579
Live Load Deflection Criteria:U480 Total Load Deflection Criteria:0360
REACTIONS A g
Live Load 385 lb 441 lb
Dead Load 123 lb 123 lb
Total Load 508 lb 564 lb
Bearing Length 0.54 in 0.60 in
SUPPORT LOADS A ¢ rRt
Live Load 289 plf 331 plf
111111111111
Dead Load 92 plf 92 plf
Total Load 381 plf 423 plf
MATERIAL PROPERTIES
#2-Douglas-Fir-Larch
JOIST
Base Values Adiusted Length
18.5 ft
Center
Bending Stress: Fb= 900 psi Fb'= 1035 psi Span Length
Cd=1.00 CF=1.00 Cr=1.15 Unbraced Length-Top 0 ft
Shear Stress: Fv= 180 psi Fv'= 180 psi Unbraced Length-Bottom 0 ft
Cd=1.00 Floor sheathing applied to top of joists-top of joists fully braced.
Modulus of Elasticity: E= 1600 ksi E= 1600 ksi Floor Duration Factor 1.00
Comp.--to Grain: Fc-1= 625 psi Fc-1-'= 625 psi JOIST LOADING
Controlling Moment: 2424 ft-lb Uniform Floor Loading Center
9.62 Ft from left su DeadDL
Live Load LL= 30 psf
pport of span 2(Center Span) Load D = 10 psf
Created by combining all dead loads and live loads on span(s)2 Total Load
Controlling Shear: -503 lb TL= 40 psf
TL Adj.For Joist Spacing wT= 53.3 plf
At a distance d from right support of span 2(Center Span) Partially Distributed Loading
Created by combining all dead loads and live loads on span(s)2 Live Load LL= 10 psf
Dead Load DL= 0 psf
Comparisons with required sections: Req'd Provided Load Start A= 12 ft
Section Modulus: 28.11 in3 31.64 in3 Load End
Area(Shear): B= 18.5 ft
4.19 int 16.88 in2 Load Length C= 6.5 ft
Moment of Inertia(deflection): 155.35 in4 244.76 in4
Moment: 2424 ft-lb 2729 ft-lb
Shear: -503 lb 2025 lb
Decking Information
Plywood Thickness: T= 3/4 in
Plywood Is Glued:
Moment of Inertia Calculations For Glued Floor:
Joist Area: A-joist= 16.88 IN2
Plywood Area: A-ply= 2.08 IN2
Section Centroid: C= 6 IN ABOVE BASE
Moment of Inertia(deflection): i-comb= 245 IN4
NOTES