Roof Truss Spacing

A mono truss is a one sloped truss that forms a right angle triangle.

Roof truss spacing. This is the distance between trusses. Most economical when the difference in slope between the top and bottom chords is at least 3 12 or the bottom chord pitch is no more than half the top chord pitch. While this can be true it is not always accurate unless in some high stress situations.

What dictates the truss design is the roof design snow load typically 20 or 30 psf in most of the u s. I ve had roof truss manufacturers try to convince me it is impossible to place wood trusses at spacings of over every 4 feet. This is most likely the standard size that you will find on pre made roof trusses.

Flat the most economical flat truss for a roof is provided when the depth of the truss in inches is approximately equal to 7 of the span in inches. Most are spaced between 18 26 inches apart. Typical standard the typical standard for the spacing on the roof trusses is 24 inches.

Once the builder or architect specifies the loads for example 20 10 0 10 for top chord live top chord dead bottom chord live and bottom chord dead loads the truss spacing and the desired shape of the truss then truss engineering. 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. 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.

Metal roofs and pole buildings. The standard roof truss spacing is 2. It s often used for sheds garages or extension of an existing roof.

Almost all residential trusses use this spacing. A mono truss roof allows for more sunlight and visual space proper drainage and relatively cheaper. Putting the trusses into place.