Roof Truss Weight Capacity

The important point to keep in mind when you use your truss calculator is that every truss calculation is completely unique and is based on the size of your roof and its specific dimensions.

Roof truss weight capacity. The straight lengths of wood known as members that roof trusses built with are connected with intersections that distribute the weight evenly down the length of each member. Trusses struts and props. This goes for manufactured roof trusses the kind assembled with metal gussets if you have traditional site built roof framing your storage capacity depends on the design of the framing. Most commonly the roof s internal support structure is composed of a fairly complicated system of structural elements designed to manage the load from the roof.

If the total weight exceeds the load limit of the truss then the truss is compromised. Dead load weight of roof trusses top chord bottom chord webs weight per lineal foot plf 2x4 2x4 2x4 4 3 2x4 2x8 2x4 5 6 2x6 2x4 2x4 4 8 2x6 2x6 2x4 5 5 2x6 2x6 2x6 6 2 2x6 2x8 2x4 5 9 2x6 2x10 2x4 6 6 2x6 2x10 2x6 7 2 2x8 2x8 2x4 6 6 2x8 2x8 2x6 7 2 2x8 2x10 2x8 8 4 dead load weight of floor trusses depth in inches top chord bottom chord. A typical load is 5 and 10 pounds per square foot. The truss is a framework consisting of rafters posts and struts which supports your roof.

Don t look at their advertised weight capacity and think that your ceiling can automatically hold that. My truss weight table per single truss. The standard guide in the u s the asce 7 05 lists weights and stresses for all building materials expressed in pounds per square foot. Be careful and your roof system will perform admirably for generations.

When in doubt go light on the weight you re storing up there. Calculating the load on a flat roof is a challenging task for the layperson that involves knowledge of building materials their weights and local building codes. All weight hanging from the truss has to be added to the existing dead load. Regardless of truss span or truss weight use common sense when lifting the trusses into place.

A roof truss is a triangular wood structure that is engineered to hold up much of the weight of the rest of the roof. 24 truss 120 150 30 160 200 36 220 300 40 270 350 50 375 500 60 450 600 70 600 800 80 800 1000. Roof truss span tables alpine engineered products 15 top chord 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 bottom chord 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2 12 24 24 33 27 27 37 31 31 43 33 33 46 2 5 12 29 29 39 33 33 45 37 38 52 39 40 55 3 12 34 34 46 37 39 53 40 44 60 43 46 64. How much weight your roof can hold before it caves in is a totally different question.