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