Roof Collateral Load

L r l o r 1 r 2.

Roof collateral load.

Generally the actually dead load weight of roof truss bottom chords and the minimal lateral bracing needed to restrain them from movement is about one half of a pound per square foot psf. Collateral loads are added dead loads hung from the building system or any interior weight of permanent materials other than the actual metal building system. Roof live load may be reduced by the following equation. The collateral load is measured in pounds per square foot english and is applied to the entire footprint of the building or shape.

The collateral load is the loading on the building caused by additional construction materials such as a false ceiling sprinkler system lighting heating air conditioning duct etc. The live loads used for the structural design of floors roof and the supporting members shall be the greatest applied loads arising from the intended use or occupancy of the building or from the stacking of materials and. Where l r shall not be less than 12 psf and not more than 20 psf. Collateral loads are additional dead loads hung from the building such as sprinkler systems.

Generally the actually dead load weight of roof truss bottom chords and the minimal lateral bracing needed to restrain them from movement is about one half of a pound per square foot psf. Collateral gravity cases cg this edit box is used to apply additional collateral load for materials attached to the roof structure. The roof panels mastic tape purlins girts and bolts are all considered dead loads. Drop ceilings hvac equipment.

Drop ceilings hvac equipment. R 1 0 6. Dead loads consist of the weight of the building itself plus the weight of all fixed items like walls roof and carpeting. Table 1 1 c typical collateral loads.

Collateral load information cg cu. My understanding is that collateral load is the weight on the inside of the building acting as gravity. We are wondering if it means what we in the uk call services load e g. Anything hung from or attached to the structural framing is a collateral dead load.

We are puzzled by the phrase collateral load in calculations which is listed in addition to dead load live imposed load etc and typically has a value of 5 lb sq ft. Even the structural frame is considered a dead load. The following table is recommended loadings for each type of collateral load. Collateral loads are additional dead loads hung from the building such as sprinkler systems.

The weight of lights pipes a c ducts etc suspended from the structure. Roof live load reduction.