Estimating Rebar In Concrete

Rebar a steel reinforcing rod that strengthens concrete is cast into the concrete as part of the construction process.

Estimating rebar in concrete.

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. One of the steps in pricing concrete is to estimate how much rebar is needed for the project. Para español haga clic aquí. 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.

There are different methods for estimating the quantities of reinforcement. Now look up the weight of your rebar. Reinforcement estimation thumb rule method this simplest method is based on the type of structure and the volume of the reinforced concrete elements. Reinforcement bar rebar functions.

Heavy industrial 130 kg m 3. Multiply the steel per m2 x your slab area. 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. The rebar calculatorcontains equations and data used in working with reinforcement bars rebar in concrete slabs.

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. Say 15m x 20m for simplicity as an example. Work out the steel per m2. Average values for typical concrete frames.

Three methods of varying accuracy are. 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. Estimating reinforcing bars how the bid price is determined by william c.

The formulas calculate materials needed for rectangular circular and irregular shaped slabs. Multiply that by your 1 140 feet and you ll find you need to order 1 189 pounds of rebar. 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. 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.

First work out your slab area. Rebar estimating is a skill that requires experience. In other words the rebar estimator is a very important cog in the reinforced concrete construction wheel. Put those together and your total order is 1 140 feet of rebar.