Roof Slab Live Load

Roof live loads largest roof loads typically caused by repair and maintenance pitch rise span lr 20 r1r2 12 lr 20 lr horizontal projection roof live load 16 r 1 r 2 live load reduction factors r 1 accounts for size of tributary area of roof column a t r 2 effect of the roof rise.

Roof slab live load.

The construction of the original building consisted of a reinforced concrete frame with cast in situ trough floors. Floor joists capacities carrying capacities of domestic timber floor joists grade c in metric units. Concrete slab thickness recommended thickness of concrete slabs. Floors live loads floors and minimum uniformly distributed live loads.

The live load on a roof is the weight of any temporary objects on the roof. Concrete walls estimate volume in concrete walls. 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. 2attic loads may be included in the floor live load but a 10 psf attic load is typically used only to size ceiling joists adequately for access purposes.

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. Live loads should be suitably calculated or assumed by the designer based on occupancy levels. Examples for live loads are weight of persons movable partitions dust loads weight of furniture etc. Live loads are different for different buildings and structures.

It keeps changing from time to time even on same structure. An extra floor was required to be constructed which involved converting the original roof slab to a floor slab thereby increasing the live load capacity to 3 kn m2.