What is double slab?

The two-way slab is a slab which is generally supported on all sides of walls or beams, and whose length to breadth ratio is less than two and it twists or bends in both direction while transferring the loads to the walls or beams.

What is double T slab?

The Double Tee (DT) slab is two symmetrically placed beams interacting with a slab forming one section with a “double tee’ shape. It is made in precast, prestressed concrete and it is primarily used for floor or roof deck systems.

What are the two types of slabs?

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.

Which slab is better one-way or two way?

In case of one-way slab, if we increase the beams width to depth ratio, and increase the percentage of steel, perpendicular to the direction of bending, then one-way slab will be more economical and will be stronger than two way slab.

Where do we use two way slab?

In two way slabs, the load will be carried in both the directions. So, the main reinforcement is provided in both directions for two way slabs. Example: These types of slabs are used in constructing floors of a multi-storeyed building.

What are different types of slabs?

What are the 16 different types of slabs in construction?

  • One-Way Flat Slab.
  • Two-Way Flat Slab.
  • Kitchen Slab.
  • Sun Shade Slab.
  • Lintel.
  • Sunken Slab.
  • Cable Suspension Slab.
  • Pre-Tension Slab.

Where are double tee slabs used?

parking structures

The double tee is the predominant component in parking structures. It has also been used to form the roofs of sport- ing facilities (such as indoor swimming pools and gym- nasiums), auditoriums, schools, colleges, theaters, food markets, warehouses, and many other types of buildings.

What is double tee roof?

A Double Tee is a pre-stressed concrete product used for parking structures, roofs and floors, where long spans are required and/or heavy loads must be supported. They are manufactured in a protected shelter which provides controlled curing. Double tees can be installed quickly to cover large areas in a single day.

What is a roof slab?

The slab or roof slab object is a three-dimensional (3D) body bounded by a planar polygon (perimeter) of any shape, and has multiple edges. The object is defined by its perimeter, edge conditions, and style.

What is the purpose of slab?

Functions of Slab:
To provide a flat surface. To act as sound, heat and fire insulator. It provides a covering shelter or working flat surface in buildings. Its primary function is to transfer the load by bending in one or two directions.

What is the minimum thickness of slab?

The minimum thickness of the slab shall be 125 mm.

What is the minimum depth of two way slab?

For slabs without drop panel 125 mm. For slabs with drop panel 100 mm.

What is the advantages of two way slab?

Advantages: More efficient structural system than a flat plate, typically with lower stress concentration at column locations. Slabs are generally thinner in comparison to the flat plate solution. Absence of beams allows lower storey heights.

Why do we design two way slab?

The two-way slab is economical for panel sizes up to 6m x 6m. i. In a one-way slab quantity of steel required is less. In a two-way slab quantity of steel is more as compared to the one-way slab.

How far can double tees span?

80 feet
The typical sizes of double tees are up to 15 feet (4.6 m) for flange width, up to 5 feet (1.5 m) for web depth, and up to 80 feet (24 m) or more for span length.

What types of buildings would you normally see double tees installed in?

Today, double tees are an ideal solution for projects involving bridges, parking decks, flooring and roofing systems, industrial buildings and more.

What is the name of a roofing slab?

Depending upon the span, an RCC slab may be designed as either one way reinforced slab or two way reinforced slab. The slab which is supported on two opposite supports is called as one way slab.

How thick is a roof slab?

5 to 14 inches
Slabs generally range from 5 to 14 inches in thickness. Spans are up to 35 feet, but may be extended by p o s t – t e n s i o n i n g .

What is a slab roof?

What are types of slabs?

What is the normal thickness of roof slab?

The overall thickness of slab is usually kept 10 cm though the minimum thickness can be 7.5 cm. The minimum area of reinforcement per unit width of a slab shall not be less than 0.15%.

What is the standard thickness of roof?

According to Indian standard rcc concrete roof slab thickness in residential building construction is 4 inches (100mm). Use of 5″ to 6″ (125mm to 150mm) is recommended if the concrete will receive occasional heavy loads.

What is the thickness of two way slab?

The two-way ribbed slab and waffled slab system: General thickness of the slab is 2 to 4 in. 11.

What is the thickness of roof slab?

What is the maximum span of a slab?

Flat slab span is mostly ranging from 7-12m and still economical. For the minimum thickness you can refer to ACI 318M-11 table9.