Roof Collateral Load

L r l o r 1 r 2.

Roof collateral load.

Collateral load information cg cu. 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. Static loads also known as dead loads are the permanent loads of the structure. Drop ceilings hvac equipment.

Table 1 1 c typical collateral loads. The collateral load is measured in pounds per square foot english and is applied to the entire footprint of the building or shape. My understanding is that collateral load is the weight on the inside of the building acting as gravity. 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 weight of lights pipes a c ducts etc suspended from the structure. Collateral gravity cases cg this edit box is used to apply additional collateral load for materials attached to the roof structure. 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. Anything hung from or attached to the structural framing is a collateral dead load.

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. 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. Drop ceilings hvac equipment. Collateral loads are additional dead loads hung from the building such as sprinkler systems.

Even the structural frame is considered a dead load. Where l r shall not be less than 12 psf and not more than 20 psf. R 1 0 6. Roof live load may be reduced by the following equation.

We are wondering if it means what we in the uk call services load e g. Collateral loads are additional dead loads hung from the building such as sprinkler systems. R 1 1 for a t less than or equal to 200 psf r 1 1 2 0 001 a t for between 200 psf and 600 psf. Roof live load reduction.

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. The following table is recommended loadings for each type of collateral load.