Rcc Roof Slab Extension

Let the shorter span has provided the main rod and longer span has provided distribution rod.

Rcc roof slab extension.

Q the length and breadth of slab is 10 meter and 7 meter respectively. Due to the structural condition the slab will have negative bending moment causing tension at the support on top. The design of the upper storey extension was a lightweight strut frame structure and after calculations were undertaken it was shown that the slab could not sustain the additional live load. It s better not to extend.

In this video following points are explained about rcc slab 1 minimum reinforcement rebar in slab according to gross cross section area 2 what should be the. 2 the construction uses rcc pillars. Which is ruling the slab thickness or depth. 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 m 2.

Beside this the slab has following information for main bars length of on rod 7 meter diameter 12 mm. Roof on masonry wall and projecting outside the building. You get leakage problems during rain due to formation of cold joint. The construction of the original building consisted of a reinforced concrete frame with cast in situ trough floors.

Your slab strength reduces on breaking a portion to attach new part. This requires joining the old rcc roof to the new one the details are 1 the frontage is about 80 feet accross the wall at the edge is 9 inch thick. Hf the area of steel or the steel per square foot. Before expanding an existing rcc slab first you have to check the reinforcement ratio used in the slab because a slab is designed on basically two parameters the crushing strength of concrete i e.

So structural point of view its not good for rcc slab 2. The projecting portion of the slab is cantilever with free support on the masonry wall. Precautions to be taken during construction of r c c.