Table of Contents
- 1 Is flat slab one way or two way?
- 2 What are advantages of flat slab when compare to other slabs?
- 3 Why do people prefer flat slabs?
- 4 What is two way slab design?
- 5 What is a two way flat slab?
- 6 What are the considerations to design a flat slab?
- 7 Why one way slab is used?
- 8 Why are two way flat slabs used for building construction?
- 9 What is the difference between flat plate and flat slab?
Is flat slab one way or two way?
Slabs are constructed to provide flat surfaces, usually horizontal, in building floors, roofs, bridges, and other types of structures….Difference between One Way Slab and Two way slab:
| One Way Slab | Two Way Slab |
|---|---|
| Slabs are supported by the beams on the two opposite sides | Slabs are supported by beams on all the four sides. |
What are advantages of flat slab when compare to other slabs?
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. |
Why do people prefer flat slabs?
Flat Slabs are considered suitable for most of the construction and for asymmetrical column layouts like floors with curved shapes and ramps etc. The advantages of applying flat slabs are many like depth solution, flat soffit and flexibility in design layout.
Are flat slabs two way spanning?
A flat plate is a two-way system usually supported directly on columns or load-bearing walls. The main feature of the flat plate floor is a uniform thickness with a flat soffit which requires only simple formwork and is easy to construct.
What is the difference between two way slab and one way slab?
The one way slab is supported by a beam on two opposite side only. The two way slab is supported by the beam on all four sides. In one way slab, the load is carried in one direction perpendicular to the supporting beam. In two-way slab, the load is carried in both directions.
What is two way slab design?
A two-way slab is a slab that is supported on all its four sides by beams. The supports carry the loads along both directions of the slab. Hence, it is called a two-way slab. If the longer span of the slab is ly and the shorter span is lx, then if it is a two-way slab, ly/lx is less than 2.
What is a two way flat slab?
The two-way flat plate slab is simply a slab of uniform thickness directly supported on columns, and it is generally suitable for relatively light loads. Often, beams are provided at the periphery of the slab to stiffen the free edges and to support the brick walls. They are not recommended in earthquake zones.
What are the considerations to design a flat slab?
1) Thickness of flat slab: – The thickness of flat slab shall be generally controlled by considerations of span to effective depth ratio. and measured from centre line of the columns shall be equal to one half the width of drop for interior panels.
What is the advantages of two way slab over one way slab?
In two way slab, as the loads are carried in both directions (longer and shorter direction) main reinforcement bars are provided in both directions. The loads are carried by two sides are equal. Slab with reinforcement in both directions is more economical than one way reinforcement slabs.
What is a two way slab design?
Why one way slab is used?
The direction (shorter side of slab) in which load is transferred is known as span. A one-way slab is designed for the spanning direction alone as it bends in only one direction. The main tension reinforcing bars therefore run parallel (spaced uniformly) to the shorter span and are usually placed at the bottom of slab.
Why are two way flat slabs used for building construction?
For the larger loads and spans, the two way flat slabs are more suitable because it has higher shear and flexural strength due to the drop panels or column capitals. Thus for heavier loading and longer span, flat slabs are used and it requires less concrete and reinforcement.
What is the difference between flat plate and flat slab?
Flat slab concrete floor system is similar to the flat plate system. The only exception is that the flat slab uses drop panels (thickened portions around the columns) to increase the nominal shear strength of the concrete at the critical section around the columns. The Equivalent Frame Method (EFM) shown in ACI 318 is used in this example.
What is the difference between two way slab and spanning slab?
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.
What are the dimensions of a two way concrete slab?
Two-Way Concrete Floor Slab with Beams Design and Detailing Design the slab system shown in Figure 1 for an intermediate floor where the story height = 12 ft, column cross-sectional dimensions = 18 in. x 18 in., edge beam dimensions = 14 in. x 27 in., interior beam dimensions = 14 in. x 20 in., and unfactored live load = 100 psf.