Estimating Rebar In Concrete

Black chief engineer reinforcing bars piling and construction specialty sales bethlehem steel corporation fabricated deformed concrete reinforcing bars size extras area weight extra per bar size sq.

Estimating rebar in concrete.

Estimating reinforcing bars how the bid price is determined by william c. The rebar calculatorcontains equations and data used in working with reinforcement bars rebar in concrete slabs. Multiply the steel per m2 x your slab area. In other words the rebar estimator is a very important cog in the reinforced concrete construction wheel.

There are different methods for estimating the quantities of reinforcement. For a patio it is common to use a 3 bar spaced every 18 24 while for a driveway 4 bar is often used with a 12 18 spacing. Add in walls and columns. Three methods of varying accuracy are.

Para español haga clic aquí. It has been said many times that an estimator s quantity survey may determine 1 whether the rebar fabricator is successful in securing a certain contract and 2 whether it turns out to be a profitable contract or not. Estimating the cost of new concrete involves much more than the price of concrete per yard or meter. There are many variables to consider such as surface prep formwork reinforcing materials and finish work plus the cost of the ready mix concrete that will add up to the total price of the job.

Concrete rebar calculator plan view diagram round measurements to 1 32 1 16 1 8 1 4 1 2 running bar points length left to right. Rebar estimating is a skill that requires experience. Say 15m x 20m for simplicity as an example. Rebar is often installed in a grid pattern and to estimate the amount needed it will be important to first identify the size and spacing is appropriate for your project.

Work out the steel per m2. Lb per ft 100 lb 18 4 00 13 600 2 00 14 2 25 7 650 2 00 11 1 56 5 313 1 00. Heavy industrial 130 kg m 3. One of the steps in pricing concrete is to estimate how much rebar is needed for the project.

Rebar a steel reinforcing rod that strengthens concrete is cast into the concrete as part of the construction process. Average values for typical concrete frames. If you re using 5 bars for example they come in at just over a pound per foot 1 043 to be precise. Reinforcement bar rebar functions.

First work out your slab area. The formulas calculate materials needed for rectangular circular and irregular shaped slabs. Reinforcement estimation thumb rule method this simplest method is based on the type of structure and the volume of the reinforced concrete elements. Multiply that by your 1 140 feet and you ll find you need to order 1 189 pounds of rebar.