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.

Footing double mat reinforcement.

Thus good placement of horizontal and vertical rebars in a footing is of utmost importance as placing concrete. Bar bending schedule for footings bar bending schedule plays a vital role in the construction of high rise buildings. The steel quantity in column footing can be calculated very easily. A good detailing of reinforcement covers topics like cover to reinforcement based on environmental considerations for durability minimum reinforcement and bar diameters proper dimensioning.

Reinforcement detailing of footing is as much important as site investigation for the structural design of footing. The diameter of footing reinforcement. Otherwise the staggered splices for different layers of reinforcing bars may. We know that we have to insert reinforcement in footings for tension requirements.

The placement size cover tying and tolerance in steel reinforcement are considered to achieve ultimate efficiency of the footing. In the mat foundations we have to provide double chair bar in the foundation to support the mesh properly. Datta the percentage of reinforcement in footings is between 0 5 to 0 8. Steel reinforcement forms an important part of concrete foundations.

Mats of reinforcement for stability as the two tie points will properly secure the dowel bars from displacing fig. Raft mat foundation is used in those places where we have less bearing capacity of the soil. 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. Before calculating the steel read carefully given footing drawing and note all the important points like.

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. Contents placement of rebar in footings1. Type of mesh used in footings is designed by structural engineer according to load analysis. Foundations spread footings flexural reinforcement.

There are different types of reinforcement in footings. These double meshes are important to space properly. A good detailing reflects the design requirement of the footing for structural stability. The spacing of the reinforcement c c.