While several load cases are created, two are shown below:
Full Load Case
Unbalanced Load Case 1
In addition to applying the proper loads, consideration must be given to the bottom chord size
used in the Attic Truss. The size of the bottom chord is based to limit the deflection in the
room. The following guideline is based on an L/D ratio not to exceed 24, which means the
room width should not exceed twice the depth of the bottom chord.
Bottom Chord Size Maximum Clear Room Size (no interior bearing)
2x6 11'0"
2x8 14'6"
2x10 18'6"
2x12 22'6"
