Statewide Building Products
Reinforcing steel and reinforcing bar is also known as reo mesh, rebar, re-bar or reo bar. It is used to strengthen concrete because of its poor tensile strength. The presence of deformed bar is key to help concrete to adhere to a reinforcing bar’s surface. In most cases around Perth, an engineer is commissioned early on to specify what reinforcing mesh and what reinforcing bar is required for retaining walls, footings, slabs or suspended slabs.
In Perth, reinforcing mesh is available in square and rectangular reinforcing bar spacing’s.
Square reinforcing mesh has its naming convention coded by 2 numbers. The first number demonstrates the size of the reinforcing bar and the second number demonstrates the spacing of reinforcing bar to create the reinforcing mesh fabric.
Rectangular reinforcing mesh is different than square reinforcing mesh as the reinforcing steel fabric spacing’s form rectangles rather than squares (as the name suggests). In addition to this, the reinforcing bar cross wires are all the same size reinforcing bar (7.6mm) no matter the size of the reinforcing mesh sheet but the long wires are different size reinforcing bars depending on the mesh size. Rectangular reinforcing steel mesh uses a three number naming convention. The first number demonstrates the size of the reinforcing bar long ways, the second number demonstrates the size the spacing of the reinforcing bar one way and the third number demonstrates the size of the reinforcing bar cross ways.
An example of square reinforcing mesh: SL52: 5mm Reinforcing Bar, 200mm spacing’s between the reinforcing bar over the sheet of reinforcing mesh.
An example of rectangular reinforcing mesh: SL718: 7mm reinforcing bar long ways, 100mm spacing’s between the reinforcing bar over the sheet of reinforcing mesh and 8mm reinforcing bar cross ways. All rectangular mesh has 100mm x 200mm spacing’s between the rebar.
In Perth, reinforcing bar is usually called rebar. Rebar is typically used in smaller areas and thicker slabs where there are more tensional forces present (less support). Rebar’s naming convention is an N (previously Y) and then a number. The N states the strength of the rebar (500MPA) and the number states the rebar size in diameter (N12 rebar = 500MPA rebar, 12mm in diameter).