Roof Truss Design

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ROOF TRUSS DESCRIPTION

A. Top Chord Overhang Length*
B. Cumulative Dimensions*
C. Panel Length*
D. Slope (The vertical rise, in inches, per 12-inch horizontal run)
E. Overall Height*
F. Peak Height*
G. Heel Height*
H. Bearing Location
I. Truss Span*
J. Design Loading (PSF)
K. Spacing O.C.*
L. Duration of Load Factors for Plate and Lumber Design
M. Top Chord, Bottom Chord, and Web Maximum Combined Stress Indices
N. Actual Deflections (inches)
O. Design and Allowable Deflection Ratios
P. Lumber Requirements
Q. Actual Bearing Size (inches-sixteenths)
R. Minimum Bearing Width Required (inches-sixteenths)
S. Required Individual Truss Member Bracing (Top Chord, Bottom Chord, and Webs, if applicable)
T. Maximum Axial Forces; Compression/Tension
U. Notes – Explanation of Load Information
V. Additional Loads/Load Cases

*Dimensions listed as feet-inches-sixteenths.

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A. Top Chord Overhang Length*
B. Cumulative Dimensions*
C. Panel Length*
D. Slope (The vertical rise, in inches, per 12-inch horizontal run)
E. Overall Height*
F. Peak Height*
G. Heel Height*
H. Knee-Wall Height*
I. Attic Room Width*
J. Attic Room Height*
K. Bearing Location
L. Truss Span*
M. Design Loading (PSF)
N. Spacing O.C.*
O. Duration of Load Factors for Plate & Lumber Design
P. Top Chord, Bottom Chord, and Web Maximum Combined Stress Indices
Q. Actual Deflections (inches)
R. Design and Allowable Deflection Ratios
S. Lumber Requirements
T. Actual Bearing Size (inches-sixteenths)
U. Minimum Bearing Width Required (inches-sixteenths)
V. Required Individual Truss Member Bracing (Top Chord, Bottom Chord, and Webs, if applicable)
W. Maximum Axial Forces; Compression/Tension
X. Notes – Explanation of Load Information
Y. Notes 8 and 9 – Important Attic Load Information
Z. Additional Loads/Load Cases (if applicable)

*Dimensions listed as feet-inches-sixteenths