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Flashcards in Wood Trusses Deck (27)
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1

If trusses are stored horizontally for more than one week, blocking should be spaced:

On 8 - 10 foot centers

2

What is the maximum allowable deflection when handling wood trusses?

6 inches in 20 feet

3

When unloading trusses with a crane, the operator should not:

Attach to web members

4

The minimum size lumber used as Lateral Restraint and Diagonal Bracing for wood trusses is:

2 x 4

5

The location of trusses along their bearing support must be within what tolerance of the plan dimension

+ or - 1/4"

6

What is the out of plumb tolerance for a truss with a 6' rise?

1 1/2"

7

Which is the proper placement of plywood when stacking on trusses?

Place over load bearing walls

8

Minimum temporary bracing should always include:

Lateral and diagonal bracing

9

What is the proper way to nail diagonal web bracing?

Use (2) 16d nails at each nailing point

10

What is the maximum allowable spacing for diagonal bracing along top chords?

20 feet

11

Can loads be placed on unbraced trusses?

NO

12

If jobsite modification of a truss is needed:

Consult a professional prior to cutting

13

What is the maximum allowable spacing for diagonal bracing along bottom chords?

15 feet

14

When lifting trusses, only connect to the:

Top chord with a closed loop attachment

15

What is the minimum number of lift points for single trusses up to 30’?

2

16

The minimum ground bracing connections should consist of:

Two 16d nails clinched

17

A 25 foot truss should not be installed if it has an overall bow that is greater than how many inche

1 ½”

18

What is the maximum spacing for TEMPORARY bottom chord lateral restraint?

15’

19

What is the maximum spacing for PERMANENT bottom chord lateral restraint?

10'

20

What is the minimum requirements for lateral restraints

2” x 4”, lapped over two trusses

21

All later restraint and diagonal bracing material should be made of what type of lumber?

2” x 4”

22

How many nails should be used to attach each brace and/or lateral restraint to each truss?

2

23

How should web diagonal braces be installed

At 45 degree angles and nailed with a minimum of two nails at each end and at each intersecting truss web.

24

Diagonal bracing is required at each end of truss row and every _____ truss spaces?

10 truss spaces

25

Temporary restraint and bracing connections shall be made with a minimum of how many nails

Two 16d nails

26

If trusses are stored for more than one week they shall be protected from the environment but must have what?

Adequate ventilation

27

What is the minimum size restraint / bracing material?

2x4 stress-grade lumber