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.
Footing double mat reinforcement.
If lap splices in the foundation mat reinforcement are to be staggered they need to be carefully detailed on the design drawings.
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.
Datta the percentage of reinforcement in footings is between 0 5 to 0 8.
Otherwise the staggered splices for different layers of reinforcing bars may.
Before calculating the steel read carefully given footing drawing and note all the important points like.
For suppose consider the case of high rise buildings it requires tons of steel to complete 10 floor building.
Bar bending schedule for footings bar bending schedule plays a vital role in the construction of high rise buildings.
There are different types of reinforcement in footings.
These double meshes are important to space properly.
The placement size cover tying and tolerance in steel reinforcement are considered to achieve ultimate efficiency of the footing.
The spacing of the reinforcement c c.
A good detailing reflects the design requirement of the footing for structural stability.
Foundations spread footings flexural reinforcement.
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.
Raft mat foundation is used in those places where we have less bearing capacity of the soil.
We know that we have to insert reinforcement in footings for tension requirements.
Mats of reinforcement for stability as the two tie points will properly secure the dowel bars from displacing fig.
Type of mesh used in footings is designed by structural engineer according to load analysis.
The steel quantity in column footing can be calculated very easily.
It is very important to learn bar bending schedule for finding out the quantities of steel reinforcement required for every component of the building.
Steel reinforcement forms an important part of concrete foundations.
In the mat foundations we have to provide double chair bar in the foundation to support the mesh properly.
