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.
Roof truss weight capacity.
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.
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.
A roof truss is a triangular wood structure that is engineered to hold up much of the weight of the rest of the roof.
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.
All weight hanging from the truss has to be added to the existing dead load.
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.
Be careful and your roof system will perform admirably for generations.
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.
A typical load is 5 and 10 pounds per square foot.
My truss weight table per single truss.
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.
The truss is a framework consisting of rafters posts and struts which supports your roof.
Regardless of truss span or truss weight use common sense when lifting the trusses into place.
Don t look at their advertised weight capacity and think that your ceiling can automatically hold that.
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.
The entire roof load is supported by load bearing walls which in turn transfer weight to the foundations of your home.
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.
