Roof Truss Spacing Standard

Although the standard spacing of roof trusses may be the same as that of rafters with 24 inch spacing being a common option the design of a truss may allow for the use of a lower grade of lumber than would be required for rafters with comparable spacing and span.

Roof truss spacing standard. As most building these days are using those pre made trusses on the roof 24 inches become the main size for any roofing construction when it comes to its truss installation. 2x4f 2000psif 1100psie 1 8x10 2x6f 1750 psi f 950 psi f 1900 psi e 1 8x10. The typical standard for the spacing on the roof trusses is 24 inches. Almost all residential trusses use this spacing.

While this can be true it is not always accurate unless in some high stress situations. Metal roofs and pole buildings. Allowable spans for 2x4 top chord trusses using sheathing other than plywood e g. This is most likely the standard size that you will find on pre made roof trusses.

After the braces are in place you will mark the distance from the edge of the building to where you would like to attach your first truss. For instance if you are spacing your trusses 18 inches apart make a mark 18 inches from the edge. These standards are as follows. Spaced sheathing or 1x boards may be reduced slightly.

There is a misconception that spacing trusses every 16 on center is better because it will be strong than the average 2.