Wood Trusses Flashcards
If trusses are stored horizontally for more than one week, blocking should be spaced:
On 8 - 10 foot centers
What is the maximum allowable deflection when handling wood trusses?
6 inches in 20 feet
When unloading trusses with a crane, the operator should not:
Attach to web members
The minimum size lumber used as Lateral Restraint and Diagonal Bracing for wood trusses is:
2 x 4
The location of trusses along their bearing support must be within what tolerance of the plan dimension
+ or - 1/4”
What is the out of plumb tolerance for a truss with a 6’ rise?
1 1/2”
Which is the proper placement of plywood when stacking on trusses?
Place over load bearing walls
Minimum temporary bracing should always include:
Lateral and diagonal bracing
What is the proper way to nail diagonal web bracing?
Use (2) 16d nails at each nailing point
What is the maximum allowable spacing for diagonal bracing along top chords?
20 feet
Can loads be placed on unbraced trusses?
NO
If jobsite modification of a truss is needed:
Consult a professional prior to cutting
What is the maximum allowable spacing for diagonal bracing along bottom chords?
15 feet
When lifting trusses, only connect to the:
Top chord with a closed loop attachment
What is the minimum number of lift points for single trusses up to 30’?
2
