Load Bearing Flat Roof

For roofs that are flat and with ground snow loads lower than 20 pounds per square foot the roof snow load is equal to 70 of the product of the exposure thermal and importance factors and the ground snow load.

Load bearing flat roof.

2 look inside the attic if possible to identify the direction in which the rafters or joists travel. Due to the triangular shape of all but. Step 4 determine the flat roof snow load. Determine the dead load of the roof.

Although they don t bear the full weight load of the roof the gable end walls are also typically load bearing and an interior wall running parallel to the roof ridge in the center of the building often bears. Calculate the live load of the roof. How to calculate load bearing capacity of a flat roof step 1. On the other two sides the roof terminates in a flat triangular gable.

The load bearing capacity of a roof should be adequate to support not only the roof cladding materials such as tiles or shingles but also objects that sit on top of the roof like. For rooms which are heavily frequented it may be 50 lbs. This is determined by adding the weights of any individuals who may work on. If a wall is located on the ground floor go down to the basement to observe the ceiling beams.

Using this technique you ll get a better idea of the location of the load bearing walls in your house. Load bearing walls support the weight of a floor or roof structure above and are so named because they bear a load. This includes the combined weights of all of the individual roof materials. For a flat roof with snow loading this is 25 lbs.

In this roof design the exterior walls on which the roof s sloping rafters rest are load bearing walls. For ground snow loads greater than 20 pounds per square foot the roof load is equal to 70 of the product of the exposure thermal and importance factors the ground snow load and 20 pounds. By contrast a non load bearing wall sometimes called a partition wall is responsible only for holding up itself. The amount of weight the internal support structure can carry without the roof collapsing can be described as its load bearing capacity.

Roof structure and load bearing capacity. Load bearing walls typically run in the same direction. A roof is composed mainly of two parts the cladding or external material and the internal support structure which holds it up. Multiply the loading per square foot by the area in square feet of the surface which the beams will be supporting.

A gable roof is a roof that slopes downward from a central ridge to a building s exterior walls on two sides. Per square foot for northern areas of the u s.