In the mat foundations we have to provide double chair bar in the foundation to support the mesh properly.
Footing double mat reinforcement.
Before calculating the steel read carefully given footing drawing and note all the important points like.
A good detailing of reinforcement covers topics like cover to reinforcement based on environmental considerations for durability minimum reinforcement and bar diameters proper dimensioning.
Raft mat foundation is used in those places where we have less bearing capacity of the soil.
It is very important to learn bar bending schedule for finding out the quantities of steel reinforcement required for every component of the building.
Contents placement of rebar in footings1.
We know that we have to insert reinforcement in footings for tension requirements.
These double meshes are important to space properly.
There are different types of reinforcement in footings.
The spacing of the reinforcement c c.
Thus good placement of horizontal and vertical rebars in a footing is of utmost importance as placing concrete.
Reinforcement detailing of footing is as much important as site investigation for the structural design of footing.
A grade of reinforcement is going to use.
The steel quantity in column footing can be calculated very easily.
The placement size cover tying and tolerance in steel reinforcement are considered to achieve ultimate efficiency of the footing.
Type of mesh used in footings is designed by structural engineer according to load analysis.
At those places we use mat foundations to distributes the whole loads of the structure to the soil when the area of the footing was increase than the soil load bearing capacity will also increase because this foundation reduces the stress on the soil at the same place.
Otherwise the staggered splices for different layers of reinforcing bars may.
The diameter of footing reinforcement.
Bar bending schedule for footings bar bending schedule plays a vital role in the construction of high rise buildings.
Mats of reinforcement for stability as the two tie points will properly secure the dowel bars from displacing fig.
Requirements for the distribution of flexural reinforcement in two way footings are given in sections 13 3 2 2 and 13 3 3 3 of aci 318 14 building code requirements for structural concrete for square footings the reinforcement is to be distributed uniformly across the entire width of the footing in both directions.
Steel reinforcement forms an important part of concrete foundations.
For suppose consider the case of high rise buildings it requires tons of steel to complete 10 floor building.
Datta the percentage of reinforcement in footings is between 0 5 to 0 8.
