CS Porch Rafter CalcCS Beam 2021.5.0.8
kmBeamEngine 2018.9.0.1
Materials Database 1587
D'Amour
272 Old Wilson Rd
7-21-22
3:51pm
1 of 1
All product names are trademarks of their respective owners
Copyright (C) 2018 by Simpson Strong-Tie Company Inc. ALL RIGHTS RESERVED.
**Passing is defined as when the member, floor joist, beam or girder, shown on this drawing meets applicable design criteria for Loads, Loading Conditions, and Spans listed on this sheet. The
design must be reviewed by a qualified designer or design professional as required for approval. This design assumes product installation according to the manufacturer`s specifications.
Member Data
Description: porch rafters Member Type: Beam Application: Roof
Top Lateral Bracing: Continuous Slope: 4.00 / 12
Bottom Lateral Bracing: 0.00
Standard Load: Moisture Condition: Dry Building Code: IBC/IRC
Snow Load: 35 PLF Deflection Criteria: L/240 live, L/180 total
Dead Load: 15 PLF Deck Connection: Nailed Member Weight: 5.6 PLF
Filename: porch rafter
Other Loads
Type
(Description) Side Begin End
Trib.
Width
Other
Start End
Dead
Start End Category
Replacement Uniform (PSF) Top 0' 0.00" 9' 6.50" 4' 0.00" 35 10 Snow
1 2
3 0 0 6 6 8
9 6 8 3 2 3Bearings and Reactions
Input Min Gravity Gravity
Location Type Material Length Required Reaction Uplift
1 3' 0.000" Wall SPF #3/Stud 2x or 4x End-Grain (650psi) 5.500" 1.500" 1293# --
2 9' 6.500" Wall SPF #3/Stud 2x or 4x End-Grain (650psi) 3.500" 1.500" 461# --
Maximum Load Case Reactions
Used for applying point loads (or line loads) to carrying members
Snow Dead
1 962# 330#
2 343# 118#
Design spans
3' 1.938" (left cant) 6' 8.000"
Actual Length
10' 3.125"
Product: Hem-Fir (N) #2 4 x 8 1 ply PASSES DESIGN CHECKS
Design assumes continuous lateral bracing along the top chord.
Design assumes maximum unbraced length of 0.00' along the bottom chord.
Allowable Stress Design
Actual Allowable Capacity Location Loading
Positive Moment 564.'# 3820.'# 14% 6.79' Total Load D+S
Negative Moment 846.'# 3820.'# 22% 3' Total Load D+S
Negative Unbrcd 846.'# 3820.'# 22% 3' Total Load D+S
Shear 583.# 2821.# 20% 3.01' Total Load D+S
Max. Reaction 1293.# 8328.# 15% 3' Total Load D+S
LL Deflection -0.0174" 0.3332" L/999+ 5.53' Cants Only S
TL Deflection 0.0199" 0.4443" L/999+ 6.48' Total Load D+S
LL Defl., Lt. 0.0583" 0.3162" 2L/999+ 0' Cants Only S
TL Defl., Lt. 0.0619" 0.4216" 2L/999+ 0' Cants Only D+S
Control: Negative Moment
DOLs: Live=100% Snow=115% Roof=125% Wind=160%
This member has been designed in accordance with NDS 2012