Roof Collateral Load

We are wondering if it means what we in the uk call services load e g.

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. Drop ceilings hvac equipment. Anything hung from or attached to the structural framing is a collateral dead load. During the foundation design for a metal building while extracting the reactions provided by the metal building company i notice that they listed the mezzanine loads as collateral.

Roof live load reduction. The roof panels mastic tape purlins girts and bolts are all considered dead loads. 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.

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. Collateral loads are additional dead loads hung from the building such as sprinkler systems. 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. 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.

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. Collateral load information cg cu.

Table 1 1 c typical collateral loads. The weight of lights pipes a c ducts etc suspended from the structure. L r l o r 1 r 2. My understanding is that collateral load is the weight on the inside of the building acting as gravity.

Collateral loads are additional dead loads hung from the building such as sprinkler systems. The collateral load is measured in pounds per square foot english and is applied to the entire footprint of the building or shape. Where l r shall not be less than 12 psf and not more than 20 psf. 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.

Even the structural frame is considered a dead load. Roof live load may be reduced by the following equation.