1. Construction Cost Estimating Class #5 - Concrete Prof. Ralph V. Locurcio, PE

2.  Forms  Reinforcing  Concrete  Spread Footings  Columns  Foundation Walls  Beams  Slab  Conclusion

3.  May be bid by itemization  Based on square footage rather than linear  SFCA = square foot contact area  Quantity of form material & labor

4.  Rebar  Welded wire fabric  Purchase  Small amounts by lineal foot (20’)  Large amounts by pound/ton  Fabricated  Fabricated in the field, lengths of 20-60 ft  Large jobs fabricated and shipped

5.  Rebar sizes

6.  Various types based specs & strength  Type I = normal cement  Type II = moderate-sulfate resistance cement  Type III = high-early-strength cement  Type IV = low-heat-of-hydration  Type V = high-sulfate –resistance cement  Mixes  Add-mixtures are included for certain physical properties

7.  Costs  Best place to get prices is from concrete suppliers  Bid by cubic yard  Labor for placement and finishing (use RS Means)  Placement  From truck with chute  Concrete bucket  Concrete pump

8.  Spread Footings  Package includes: footings, forms, horizontal rebar in the footings and the dowles  Continuous footings  Similar to spread footing but a much longer than they are wide

10. Figure 5-1

12. Volume Calculation

13. Linear Calculation

14. Concrete column as volumetric good

15. Figure 5-1

26.  Lots of examples  Any questions?