Estimating Rebar In Concrete

One of the steps in pricing concrete is to estimate how much rebar is needed for the project.

Estimating rebar in concrete.

There are different methods for estimating the quantities of reinforcement. Multiply that by your 1 140 feet and you ll find you need to order 1 189 pounds of rebar. The rebar calculatorcontains equations and data used in working with reinforcement bars rebar in concrete slabs. Reinforcement bar rebar functions.

The formulas calculate materials needed for rectangular circular and irregular shaped slabs. Estimating reinforcing bars how the bid price is determined by william c. Say 15m x 20m for simplicity as an example. Rebar a steel reinforcing rod that strengthens concrete is cast into the concrete as part of the construction process.

If you re using 5 bars for example they come in at just over a pound per foot 1 043 to be precise. Estimating the cost of new concrete involves much more than the price of concrete per yard or meter. 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. Para español haga clic aquí.

Now look up the weight of your rebar. Rebar estimating is a skill that requires experience. At whitacre engineering we give our clients fast accurate quotes. 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.

Work out the steel per m2. 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. Reinforcement estimation thumb rule method this simplest method is based on the type of structure and the volume of the reinforced concrete elements. Multiply the steel per m2 x your slab area.

Put those together and your total order is 1 140 feet of rebar. Add in walls and columns. 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. 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.

Average values for typical concrete frames. In other words the rebar estimator is a very important cog in the reinforced concrete construction wheel. First work out your slab area. 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.