One Way Roof Slab Design

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.

One way roof slab design.

In other words the one way slab is supported by beams in such a way that the load is carried along one direction. Under the action of loads it is deflected in the short direction only in a cylindrical form. One way slabs transfer the imposed loads in one direction only. One way slab can be defined as the type of slab in which the ratio of the longer span to the shorter span is greater than two.

When the ratio of the longer to the shorter side l s of the slab is at least equal to 2 0 it is called one way slab shown in figure 8 1 a. When a slab is supported on all four sides and the ratio of long span to short span is equal or greater than two it will be considered as one way slab. L ln h 2 h 2 ln h h depth of slab and l c c distance between supports. One way slab design steps.

One way slab and two way slab. H min for the slab is different compared with the beams. L effective span lesser of the following. Design a one way slab for the inside of a building using the span loads and other data given in figure 1.

Calculate the effective span of slab from is 456 clause 22 2 which is least of. One way slab is designed as singly reinforced rectangular section. 1 1 a in which the structural action is essentially one way the loads being carried in direction perpendicular to the supporting beams or walls. They may be supported on two opposite sides only fig.

The load on the slab is carried by the short span in one direction. Longer span l shorter span b 2. 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. Examples of one way slab.

However main reinforcement bar and distribution bar in transverse direction. Assuming cover 3 4 in figure 1 the minimum thickness for one way slab simply supported l 20 using table 1 aci 9 5 2 1. Determine the minimum thickness of slab from serviceability criteria of deflection control.