Roof Slab Reinforcement Design

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.

Roof slab reinforcement design.

The diameter of bar generally used in slabs are. 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. Design procedure of one way slab. Identify the type of slab.

Flexural reinforcement must be greater than 0 0018 psi or the shrinkage reinforcement. If reinforced concrete were to be reused strong connections would have to be made between roof and walls. Find the effective span which is lesser of i distance between centres of bearings and ii clear span and effective depth. Maximum spacing of main bar is restricted to 3 times effective depth or 300 mm whichever is less.

Determine h min and round it to higher 10mm multiple. Assume the thickness of slab take 4 cm per metre run of the span. The maximum diameter of bar used in slab should not exceed 1 8 of the total thickness of slab. However the complexity of the generalized approach.

Thickness of the slab is decided based on span to depth ratio specified in is456 2000. Determine the dead load that is acting on the slab. Such slabs left unconnected to walls caused many deaths in the 2005 quake from school roof collapses. However including the beams would effectively transfer a load of slabs to the columns which is good for durability of the structure.

The slab has to carry a distributed permanent action of 1 0 kn m2 excluding slab self weight and a variable action of 3. 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. 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. Rcc roof slab reinforcement details if you follow the minimum standards for structural design for modern day buildings you can opt for creating the rcc without a beam it is called a flat slab.

Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. Should not be less than 110 mm for rooms should not be less than 75 mm for sunshades. 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. Reinforced concrete slabs are heavier and generate higher seismic forces in an event.

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.