Double Mat Slab Reinforcement

What is a slab.

Double mat slab reinforcement.

Aci 350 10 5 4 for structural slabs mats and footings of uniform thickness the minimum area of tensile reinforcement in the direction of the span shall be the same as required by 7 12. Reinforced concrete box culvert wall is the vertical reinforcing steel on both sides of the wall. If it is a mat on piles the mat is also restrained by the piles. Though little known 10 years ago today mat slabs are a standard solution for building sites with difficult soil conditions.

Per code section 7 12 2 2 the bar spacing is limited to five times the slab thickness or 18 in. For walls the minimum area of reinforcement steel shall be as required by 14 3 2 and 14 3 3. Layout configuration the reinforcing bars can be placed in two layers one mat or four layers two mats at both the top and bottom. The main reinforcing in a bridge slab supported by beams is both the top and the bottom transverse reinforcing steel.

Both ways you can see the one way slab and two way slab two way slab supported by four side beam and one way slab supported by two side beam 8 mm rods been u. Mat foundations are often at the basement level of buildings and can be below the water table. 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. The main reinforcing in a single barrel reinforced concrete box culvert slab is the bottom transverse reinforcing steel.

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