Table of Contents
How do you calculate cantilever slab load?
Example of deflection calculation Cantilever slab with thickness h=200 mm, length L=2.00 m and concrete C40/50, is subjected to covering load gεπ=1.0 kN/m2, live load q=5.0 kN/m2 and concentrated load G=4.0 kN/m applied at the end. Calculate bending moments, shear forces and deflections in ultimate limit state.
How wide can a cantilever be?
According to the new span tables and IRC provisions, cantilevers can extend up to one-fourth the backspan of the joist. This means that joists, such as southern pine 2x10s at 16 inches on-center, spanning 12 feet are allowed to cantilever up to an additional 3 feet (see illustration, below).
What is effective length of cantilever?
The effective length or span of cantilever beam is taken as length of overhangs or length of clear span plus half of the effective depth of beam. effective length = length of clear span + half of effective depth of beam.
How will you design a cantilever slab?
Cantilever Slab Design Calculation & Procedure
- Span of slab 1.5m.
- Variable load 4kN/mm2.
- Slab thickness 175mm.
- Fck 25N/mm2 fyk 500N/mm2.
- Cover to the reinforcements 25mm.
- Office building.
What is the maximum length of a cantilever slab?
According to IS code 456:2000, the maximum size (length) of the cantilever depends on the effective depth of the cantilever. The span to depth ratio for a cantilever slab should not exceed 7. Also maximum size of cantilever provided should be 10m i.e ;length of the cantilever should not be more than 10 meters.
How do you deal with a large span cantilever?
This is one of the most efficient ways of dealing with large span cantilevers. For improved aesthetics, the web can be adequately covered with finishes to make the whole arrangement look like one single section. See the example below where the use of multiple members have been used to approach a relatively large span cantilever problem.
What type of concrete is used for rectangular reinforced concrete slab?
A rectangular reinforced concrete slab is simply- supported on two masonry walls 250 mm thick and 3.75 m apart. The slab has to carry a distributed permanent action of 1.0 kN/m2(excluding slab self- weight) and a variable action of 3.0 kN/m2. The materials to be used are grade C25 concrete and grade 500 reinforcement.
How to support a cantilever roof?
On the other hand, you can try prestressing, and if your architect permits, the use of trusses to support the cantilever will provide a very fast and simple solution.