Constructing Concrete Lintel

The structure engineer design lintels for large building, but you can follow the basic guide lines when construct lintel for domestic scale construction.

The table bellow show the standard dimensions for lintels

Span	Depth	Reinforced bar diameter
900mm 1200mm 1500mm 1800mm	150mm 150mm 215mm 215mm	10mm 12mm 12mm 16mm

Table 1. Standard dimensions for lintels

v Casting concrete lintels

After designing, lintels should be cast, the lintel can be cast in situ or precast. The span will determine the height of the lintel which should correspond to the height of full bricks courses

- Precast: is the process of making lintels separately from the building and the advantage is that the lintel can be placed in position as so an as the brick work is ready.

- In Situ: is the process of pouring the concrete into the formwork across the opening to make the lintel and we follow those three procedures:

i) Put the timber formwork across the opening

ii) Place the reinforcement bars

iii) Pouring the concrete

N.B: after the concrete harden, you remove the formwork this method increases the labours element of the job and may flow down the brick laying or concrete walls materials.

Slabs

Definition: A flat plate used in construction or a piece of stone or concrete used to pave sidewalks or roads surface.

A concrete slab is a common structural element of modern building.

A slab is most used for differentiate the upper floor and also you can found the ground slab where, there is no enough stability of the soil.

Beams

Horizontal member across the structure and support the load just above opening

If an opening is very large then the wall may not give enough support to a floor or roof.

In these rose you would normally put in a steel or reinforced concrete floor slab.

You might also use a tie beam at the top of on external wall that encloses the four sides of a building thus improves the stability at the top of the wall where the roof is tied down to the bricks or blocks work.

Дата добавления: 2015-07-19