What is the purpose of slab?

A slab is a structural element, made of concrete, that is used to create flat horizontal surfaces such as floors, roof decks and ceilings. A slab is generally several inches thick and supported by beams,columns, walls, or the ground.

What is slab in civil engineering?

Slab is an important structural element which is constructed to create flat and useful surfaces such as floors, roofs, and ceilings. It is a horizontal structural component, with top and bottom surfaces parallel or near so. Commonly, slabs are supported by beams, columns (concrete or steel), walls, or the ground.

What is slab and its types?

The major types of concrete slabs used in construction are one-way joist slab, flat slab, flat plate, waffle slab, hollow core slab, precast slab, slabs on grade, hardy slab, and composite slab. 2. What are slab on grade or ground slab? The slab which is cast on the surface of the earth is called a Ground slab.

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What are floor slabs?

1: a paving slab. 2: the slab forming the floor of a usually reinforced-concrete structure.

What is the difference between a concrete slab and a cement slab?

What is the difference between cement and concrete? Although the terms cement and concrete often are used interchangeably, cement is actually an ingredient of concrete. Concrete is a mixture of aggregates and paste. The aggregates are sand and gravel or crushed stone; the paste is water and portland cement.

How long does a concrete slab last?

Poured concrete block footings and slab foundations should last a lifetime, 80 to 100 years or more provided they were quality built.

Which slab is best?

Two way slabs are the slabs that are supported on four sides and the ratio of longer span (l) to shorter span (b) is less than 2. In two way slabs, load will be carried in both the directions. So, main reinforcement is provided in both direction for two way slabs.

How thick is a suspended concrete slab?

A typical concrete slab can be between 100 to 500 mm in thickness and will be steel reinforced. SUSPENDED REINFORCED CONCRETE DESIGNS: There are different designs used for suspended reinforced concrete slabs. All the designs ensure a high strength to weight ratio.

How do you design a slab?

The effective depth d of two way slabs can also be assumed using cl. 24.1,IS 456 provided short span is <3.5m and loading class is <3.5KN/m. Or, the following thumb rules can be used:

  1. One way slab d=(L/22) to (L/28).
  2. Two way simply supported slab d=(L/20) to (L/30)
  3. Two way restrained slab d=(L/30) to (L/32)
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What is slab level?

The term ‘floor slab ‘ usually refers to a floor that has been formed using concrete (and generally steel reinforcement) and may form part of the structure of a building. It may form the floor of a basement, at ground level or at upper levels.

What is 2way slab?

Two – way slabs are slabs that are supported on four sides. In two – way slabs, the load will be carried in both directions, thus main reinforcement is provided in both directions for two – way slabs. The slabs are considered as spanning two – way when the longer to shorter span length is less than a ratio of two.

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.

What is the difference between slab and floor?

Slabs are also use to construct the floors which are known as the ‘ floor slabs ‘. The common language for the floor slabs are the ‘ floor ‘. In buildings, the lower surface of floor slab or the surface of floor slab just above your head is called ceiling.

What slabs mean?

(Entry 1 of 3) 1: a thick plate or slice (as of stone, wood, or bread): such as. a: the outside piece cut from a log in squaring it. b: concrete pavement (as of a road) specifically: a strip of concrete pavement laid as a single unjointed piece.

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What is concrete slab on grade?

A slab-on-grade is a type of shallow foundation in which a concrete slab rests directly on the ground below it. A slab-on-grade foundation usually consists of a thin layer of concrete across the entire area of the foundation with thickened footings at the edges or below load bearing walls in the middle of the building.

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