For every metre of span f.
Concrete roof slab reinforcement.
6 mm 8 mm 10 mm 12mm and 16mm.
Work on the ground in large sections then use a crane to lift the sections into place.
Concrete roof can be significantly higher than.
While it was not a part of the 1977.
Of the gross cross.
Materials and machinery for slab.
Reinforced concrete sloped roof slab overhang detailcross section detail of a reinforced concrete sloped inclined roof slab overhang cantilever detail s.
The corresponding calculated strengths f y1 t and f y2 t are determined from fig.
Thickness of the slab is decided based on span to depth ratio specified in is456 2000.
This method has been used extensively since 1963 for slabs supported at the edges by walls steel beams or monolithic concrete beams having a total depth not less than about 3 times the slab thickness.
Roof slab design reinforcement cement concrete work steel binding for estimating the thickness of slab approximately allow 4 cm.
The minimum area of reinforcement per unit width of a slab shall not be less than 0 15.
Slabs supported on four sides of each slab panel by relatively deep stiff edge beams.
The diameter of bar generally used in slabs are.
In a reinforced concrete slab with one surface exposed to high temperature the isothermal lines of temperatures 300 c and 800 c h 3 and h 8 at time t are known the trapezoid calculated strength of concrete at elevated temperatures fig.
4 inch into the roof slab after concreting these channels retain.
The maximum diameter of bar used in slab should not exceed 1 8 of the total thickness of slab.
Minimum reinforcement is 0 12 for hysd bars and 0 15 for mild steel bars.
Following quality points should be kept in mind.
13 2 a is selected and the temperatures of the upper and the lower reinforcements a s1 and a s2 on the section are t s1 and t s2 respectively.
Reinforcement projecting from the concrete or masonry walls is bent to the slope of the roof and lapped with the roof s rebar to pro.
Maximum spacing of main bar is restricted to 3 times effective depth or 300 mm whichever is less.
The mix of concrete for the slab is usually by volume and is of.
Building roof slab shuttering and reinforcement work.
While construction work building roof slab shuttering and reinforcement work should be carefully done.
Formwork is temporary support given to concrete until it gains strength to withstand its self weight.