Roof Collateral Load

Collateral load information cg cu.

Roof collateral load.

The weight of lights pipes a c ducts etc suspended from the structure. 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. L r l o r 1 r 2. Static loads also known as dead loads are the permanent loads of the structure.

Collateral gravity cases cg this edit box is used to apply additional collateral load for materials attached to the roof structure. Table 1 1 c typical collateral loads. The roof panels mastic tape purlins girts and bolts are all considered dead loads. Drop ceilings hvac equipment.

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

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. We are wondering if it means what we in the uk call services load e g. R 1 0 6. Roof live load reduction.

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. 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. 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 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. Roof live load may be reduced by the following equation.