Table of Contents
What is the maximum span of flat slab?
Examples of slab thickness and indication of maximum span for solid slabs with ordinary ( ) and prestressed ( ) reinforcement according to [2]. The allowed recommended span lengths for continuous slabs are equal to 13.6m for two-way slabs and to 12.5m for unidirectional slabs.
What is the code provision for flat slab?
7. 1 CHAPTER 1 INTRODUCTION Flat slab is a reinforced concrete slab supported directly by concrete columns without the use of beams.
How far can a two way slab span?
These slabs are economical in spans up to 14m in square panels. Thickness is governed by deflection, punching shear around columns and shear in ribs.
How do you calculate the span of a slab?
The calculations based on IS 456 is given below: Clear span l n =4200mm….Effective span of continuous beams and slabs.
| Support A | Support B | |
|---|---|---|
| Fig. to use | Fig.(a) | Fig.(b) |
| h | 350 | 350 |
| t | 300 | 300 |
| ai = lesser of {h/2; t/2} | 150 | 150 |
What is the advantage of flat slab?
Advantages of Flat Slab
| 1 | Flexibility in room layout. Partition walls can be placed anywhere. Offers a variety of room layout to the owner. False ceilings can be omitted. |
|---|---|
| 6 | Prefabricated welded mesh. Standard sizes Less installation time Better quality control. |
| 7 | Auto sprinkler is easier. |
Where flat slab is used?
Flat slabs are mostly used in large industrial structures, parking garages, ramps, warehouse, high rise buildings and hotels. 2. They are also used where uses of beams are not required.
What is middle strip in flat slab?
In a flat slab the column strip is the one placed at the center, whereas middle strip is placed among two column strips. In the flat slab, the column strips are the middle portion of the column and each side has a width equal to 1/4th of the shorter span.
Where is one way slab used?
Due to the huge difference in lengths, the load is not transferred to the shorter beams. Main reinforcement is provided in shorter span and distribution reinforcement in a longer span. Example: Generally all the Cantilever slabs are one Way slab. Chajjas and verandahs are a practical example of one way slab.
How is two way slab calculated?
How do we calculate a one way or two-way slab? If the L/b ratio is greater than or equal to 2 or then it is considered a one-way slab. If the L/b ratio is less than 2 then it is considered a two-way slab.
What is the effective span of a slab?
The distance between the centers of support, or the clear distance between supports plus the effective depth of the beam or slab, the lesser value being taken.
What is effective depth of a slab?
Effective Depth (d) – The effective depth (d) of a reinforced concrete floor slab is the distance from the compression face to the centre of the tensile steel when an element is subjected to a bending moment.
Why drop is provided in flat slab?
Uses of drop panels : Drop panels increase the shear strength of the flat slab floor (i.e it resists shear). Drop panels increase the flat slab’s negative moment capacity. Drop panels reduce deflection by stiffening the flat slabs.
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