Double Mat Slab Reinforcement

Mat foundations are often at the basement level of buildings and can be below the water table.

Double mat slab reinforcement.

For walls the minimum area of reinforcement steel shall be as required by 14 3 2 and 14 3 3. Slabs are constructed to provide flat surfaces usually horizontal in building floors roofs bridges and other types of structures the slab may be supported by walls or by reinforced concrete beams usually cast monolithically with the slab or by structural steel beams or by columns or by the ground. Layout configuration the reinforcing bars can be placed in two layers one mat or four layers two mats at both the top and bottom. Though little known 10 years ago today mat slabs are a standard solution for building sites with difficult soil conditions.

The main reinforcing in a bridge slab supported by beams is both the top and the bottom transverse reinforcing steel. That amount of reinforcement may or may not satisfy the flexural requirement. What is a slab. The main reinforcing in a single barrel reinforced concrete box culvert slab is the bottom transverse reinforcing steel.

Reinforced concrete box culvert wall is the vertical reinforcing steel on both sides of the wall. Per code section 7 12 2 2 the bar spacing is limited to five times the slab thickness or 18 in. Typically reinforced with a double layer of rebar throughout its pad a mat slab is capable of bearing loads at virtually any point and distributing heavy loads across an expanse of weak subsoil. If it is a mat on piles the mat is also restrained by the piles.

Code section 15 10 4 also sets the maximum spacing of mat reinforcement at 18 in.