Roof Weight Allowed

Roof structure and load bearing capacity.

Roof weight allowed.

The dead load of a typical asphalt shingled wood framed roof is about 15 pounds per square foot. Ballast stone fractures and gets sharper over time which can puncture the membrane. Obviously the answer to this question depends on the condition of the rv roof at that time. The load increases with the use of heavier roofing material.

A clay tiled roof may have a dead load. 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. What weight can the rv roof handle. The owner s manual for your car will have a section on the maximum weight that can be carried on the roof.

If the bottom chord of a roof truss functions as a floor joist such as in an attic room it carries a live load that also varies by use but a typical live floor load for a residential space is about 40 pounds per square foot. Ballast stone traps a lot of dirt making patching difficult. The amount of weight the internal support structure can carry without the roof collapsing can be described as its load bearing capacity. A normal human average weight of around 250 lbs to 280 lbs should be the limit for the roof.

Adds a lot of weight to the roof system typically 10 15 pounds per square feet. But on an average the rv roof should be able to handle one persons weight easily. Extremely difficult to find a leak in this system since the membrane is well hidden.