Roof Slab Reinforcement Design

Design procedure of one way slab.

Roof slab reinforcement design.

If reinforced concrete were to be reused strong connections would have to be made between roof and walls. However the complexity of the generalized approach. The slab has to carry a distributed permanent action of 1 0 kn m2 excluding slab self weight and a variable action of 3. According to the 1995 aci code all two way reinforced concrete slab systems including edge supported slabs flat slabs and flat plates are to be analyzed and designed according to one unified method such as direct design method and equivalent frame method.

Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. However including the beams would effectively transfer a load of slabs to the columns which is good for durability of the structure. Flexural reinforcement must be greater than 0 0018 psi or the shrinkage reinforcement. Identify the type of slab.

Reinforced concrete slabs are heavier and generate higher seismic forces in an event. Steps to be followed in the design of slab assuming suitable bearings not less than 10cm find the span of the slab between the centers of bearings. Determine h min and round it to higher 10mm multiple. In this video we learn how to reinforcement design in slab in autocad in hindi dear all slab two type ke hote hain one way slab two way slab slab me reinforc.

Such slabs left unconnected to walls caused many deaths in the 2005 quake from school roof collapses. 6 mm 8 mm 10 mm 12mm and 16mm. Find the effective span which is lesser of i distance between centres of bearings and ii clear span and effective depth. Simply supported one way slab a rectangular reinforced concrete slab is simply supported on two masonry walls 250 mm thick and 3 75 m apart.

Minimum reinforcement is 0 12 for hysd bars and 0 15 for mild steel bars. Determine the dead load that is acting on the slab. The maximum diameter of bar used in slab should not exceed 1 8 of the total thickness of slab. Should not be less than 110 mm for rooms should not be less than 75 mm for sunshades.

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 vide secure anchorage. Assume the thickness of slab take 4 cm per metre run of the span. A stiff concrete mix specified at 3000 psi is pumped into place as workers advance up the slope to vi brate and finish the concrete to the desired thickness. The diameter of bar generally used in slabs are.

Thickness of the slab is decided based on span to depth ratio specified in is456 2000.