Roof Strut Spacing

Struts are generally more efficient the closer they are to the vertical.

Roof strut spacing.

To determine how many trusses to create you will first need to measure both the width and the length of the structure you are building. The trusses should be a little longer than the exact width to allow for overhang and you will need sufficient trusses to mount across the length. The same concept holds true for roof trusses. They are birdsmouthed or halved to fit underpurlins as shown below.

Struts must be either vertical perpendicular to the rafters or at an angle to the vertical which does not exceed 35 o. Follow this guide to ensure the spacing and stability of your diy roof trusses. Struts should be adequately supported over studs in timber walls. Typical roof truss spacing means that they are usually about 24 inches from centre which means at the centre of one truss there will be a two foot gap or twenty four inch gap until the centre of the next truss.

These standards are as follows.