The Four Types of Trusses Processed by the Win Cad Program Are the Common Truss, the Common

Truss Help

The four types of trusses processed by the Win Cad program are the common truss, the common gable end truss, the scissors truss, and the pole barn truss.

An example of each of these four types of trusses is shown below. All four examples drawn here are 24 feet long with a 1 foot overhang on each end.

The Win Cad program is capable of drawing any size pitch on a building regardless of the practicality of transporting the truss to the job site. Standard sizes for each type of truss are given in the charts below.

If you are interested in receiving a "Pretty Good Estimating" material checklist, including the correct trusses, it is critical that your specific truss information is accurate.

Common Truss

Choose a common truss when you use wood sheathing and shingles.

Truss spacing = 2 foot on center

Pitch / Maximum Span in Feet
3/12 / 60
4/12 / 60
5/12 / 54
6/12 / 46
7/12 / 38
8/12 / 34
9/12 / 30
10/12 / 26
11/12 / 24
12/12 / 22

Gable End Truss

Some builders prefer to use a gable end truss on the ends of their building.

Pitch / Maximum Span in Feet
3/12 / 60
4/12 / 60
5/12 / 54
6/12 / 46
7/12 / 38
8/12 / 34
9/12 / 30
10/12 / 26
11/12 / 24
12/12 / 22

Scissors Truss

Use a scissors truss for added interior headroom.

A scissors truss is more expensive and harder to install than a common truss.

Truss spacing = 2 foot on center

Pitch / Maximum Span in Feet
3 & 1.5/12 / 40
4 & 2/12 / 52
5 & 2.5/12 / 54
6 & 3/12 / 44
7 & 3.5/12 / 38
8 & 4/12 / 34

Pole Barn Truss

A pole barn truss is designed for use in conjunction with purlins and a metal roof.

Truss spacing = 4 or 8 foot center line spacing

Pitch / Maximum Span in Feet
3/12 / 60
4/12 / 60