Roof Truss Weight Capacity

How much weight your roof can hold before it caves in is a totally different question.

Roof truss weight capacity.

The entire roof load is supported by load bearing walls which in turn transfer weight to the foundations of your home. 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. 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. Make sure items are spaced so that the weight is evenly distributed over the chords.

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. If the total weight exceeds the load limit of the truss then the truss is compromised. 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. 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.

Don t look at their advertised weight capacity and think that your ceiling can automatically hold that. My truss weight table per single truss. Be careful and your roof system will perform admirably for generations. A typical load is 5 and 10 pounds per square foot.

Regardless of truss span or truss weight use common sense when lifting the trusses into place. 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. When in doubt go light on the weight you re storing up there. The dead load on the bottom chord of a truss varies with the weight of materials attached to it such as drywall on the ceiling.

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. 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. 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. The truss is a framework consisting of rafters posts and struts which supports your roof.