Concrete Foundations for Retaining Walls Includes hand excavation in normal soil, backfilling, board or plywood forming as noted, grade 60 reinforcing steel and 3,000 P.S.I. concrete poured from the chute. Concrete waste when poured against earth is assumed to be 1" of concrete at the bottom of the footing and 2" along the walls. Concrete waste when poured against forms is assumed to be 1" at the bottom of the pad. When forms are used, estimate that excavation will be required 18" beyond the forms.
36" wide x 12" deep foundation with 4 No. 5 bars, 2' deep
  Hand excavated, poured against earth
    Excavation CL@.412 LF — 16.70 16.70
    Reinforcing steel RB@.072 LF 3.48 4.61 8.09
    Concrete CL@.075 LF 14.70 3.03 17.73
  Hand excavated, poured against forms
    Excavation CL@.894 LF — 36.20 36.20
    Formwork M2@.251 LF 1.66 11.10 12.76
    Reinforcing steel RB@.072 LF 3.48 4.61 8.09
    Concrete CL@.068 LF 13.90 2.75 16.65
36" wide x 12" deep with 4 No. 5 bars, 3' deep
  Hand excavated, poured against earth
    Excavation CL@.635 LF — 25.70 25.70
    Reinforcing steel RB@.072 LF 2.48 4.61 7.09
    Concrete CL@.075 LF 14.70 3.03 17.73
  Hand excavated, poured against forms
    Excavation CL@1.36 LF — 55.00 55.00
    Formwork M2@.251 LF 1.66 11.10 12.76
    Reinforcing steel RB@.072 LF 3.48 4.61 8.09
    Concrete CL@.068 LF 13.90 2.75 16.65
36" wide x 12" deep with 6 No. 5 bars, 2' deep
  Hand excavated, poured against earth
    Excavation CL@.412 LF — 16.70 16.70
    Reinforcing steel RB@.108 LF 5.22 6.92 12.14
    Concrete CL@.075 LF 14.70 3.03 17.73
  Hand excavated, poured against forms
    Excavation CL@.894 LF — 36.20 36.20
    Formwork M2@.251 LF 1.66 11.10 12.76
    Reinforcing steel RB@.108 LF 5.22 6.92 12.14
    Concrete CL@.068 LF 13.90 2.75 16.65
36" wide x 12" deep with 6 No. 5 bars, 3' deep
  Hand excavated, poured against earth
    Excavation CL@.635 LF — 25.70 25.70
    Reinforcing steel RB@.108 LF 5.22 6.92 12.14
    Concrete CL@.075 LF 14.70 3.03 17.73
  Hand excavated, poured against forms
    Excavation CL@1.36 LF — 55.00 55.00
    Formwork M2@.251 LF 1.66 11.10 12.76
    Reinforcing steel RB@.108 LF 5.22 6.92 12.14
    Concrete CL@.068 LF 13.90 2.75 16.65
36" wide x 16" deep with 6 No. 5 bars, 2' deep, No. 4 transverse bars at 2' O.C.
  Hand excavated, poured against earth
    Excavation CL@.400 LF — 16.20 16.20
    Reinforcing steel RB@.108 LF 6.02 6.92 12.94
    Concrete CL@.096 LF 19.20 3.88 23.08

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