Flat Roof Live Load Uk

A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal.

Flat roof live load uk.

Step 4 determine the flat roof snow load. The live load on a roof is the weight of any temporary objects on the roof. Standard loads for structural calculations in residential properties. Ordinary flat pitched and curved roofs and awnings and canopies other than of fabric construction supported by a skeleton structure are permitted to be designed for a reduced uniformly distributed roof live load l r as specified in the following equations or other controlling combinations of loads as specified in section 1605 whichever produces the greater load effect.

Minimum uniformly distributed live loads adapted from sei asce 7 10. 0 9d 1 0e effect or 0 9 when resisting the load when permanent. Live loads on roofs table 1 3 gives lives loads on flat roofs sloping roofs and curved roofs. Standard loads of materials.

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. A flat roof usually consists of the following. Waterproof membrane to prevent water penetrating the structure and interior of the. 0 9d 1 0w a load factor of 1 6 when adding to load 7.

Where snow isn t a problem the live load can come from people working on the roof and any equipment they take on to the. For ground snow loads greater than 20 pounds per square foot the roof load is equal to. The standard guide in the u s the asce 7 05 lists weights and stresses for all building materials expressed in pounds per square foot. 1 2d 1 0e l 0 2s when h loads are present they shall have 6.

Schedule of permanent loads commonly found in residential properties. Flat roof construction for residential. Although flat roofs are cheaper to build than pitched roofs they have a shorter life span.