EXAMPLE 7.7.1. ESTIMATING ISOLATED FOOTING REINFORCEMENT

Estimate the reinforcement required for the 1.50m square footing shown. Reinforcement used is D12mm steel bars. Determine the tie wire needed.

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The configuration of the rebars is shown from the plan. There is no need for any hook or bend on the rebars. This means that the length of the bars only includes the size of the column less the clear cover.

              

From plans, number of bars can be determined. (Specification is usually the number of bars used both ways, or the spacing between bars)

                

Thus, rebars required:

                24pcs D12mm RSB at 1.35m

It is the estimator's discretion on which commercial length these bars are to be taken from. Note the remaining length if they can still be used in the construction for other purposes.


#16 GI Tie Wire:

             

  





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