Slab-on-grade forms (cont.) These costs assume nails, stakes, form oil, and accessories are used for each board foot of lumber. Note that costs listed below are per linear foot (LF) of form. Figures in parentheses show the average square feet of contact area (SFCA) per linear foot of form. Use this figure to convert costs and man hours per linear foot to costs and manhours per square foot. For scheduling purposes, estimate that a crew of 5 will lay out, fabricate and erect the following quantities of slab-on-grade edge forms in an 8-hour day:
Edge forms over 12" high to 24" high, 4.5 BF per LF of form (average 1.5 SFCA per LF)
  1 use F5@.124 LF 3.00 5.87 8.87
  3 uses F5@.119 LF 1.62 5.64 7.26
  5 uses F5@.115 LF 1.35 5.45 6.80
Edge forms over 24" high to 36" high, 7.5 BF per LF of forms (average 2.5 SFCA per LF)
  1 use F5@.166 LF 4.83 7.86 12.69
  3 uses F5@.160 LF 2.54 7.58 10.12
  5 uses F5@.155 LF 2.08 7.34 9.42
Add for 2" x 2" tapered keyed joint, one-piece, .38 BF per LF
  1 use F5@.044 LF .23 2.08 2.31
  3 uses F5@.040 LF .12 1.89 2.01
  5 uses F5@.035 LF .09 1.66 1.75
Blockout and slab depression forms. Figure the linear feet required Use the linear foot costs for slab edge forms for the appropriate height and then add per linear foot
  Blockouts F5@.030 LF .67 1.42 2.09
Wall forms Formwork over 6' high includes an allowance for a work platform and handrail built on one side of the form for use by the concrete placing crew.
Heights to 4', includes 1.1 SF of plyform, 1.5 BF of lumber and allowance for nails, ties and oil per SFCA
  1 use F5@.119 SFCA 2.54 5.64 8.18
  3 uses F5@.080 SFCA 1.40 3.79 5.19
  5 uses F5@.069 SFCA 1.17 3.27 4.44
  Add for 1 side battered F5@.016 SFCA .25 .76 1.01
  Add for 2 sides battered F5@.024 SFCA .51 1.14 1.65
Heights over 4' to 6', includes 1.1 SF of plyform, 2.0 BF of lumber and allowance for nails, ties and oil.
  1 use F5@.140 SFCA 2.85 6.63 9.48
  3 uses F5@.100 SFCA 1.55 4.74 6.29
  5 uses F5@.080 SFCA 1.29 3.79 5.08
  Add for 1 side battered F5@.016 SFCA .28 .76 1.04
  Add for 2 sides battered F5@.024 SFCA .57 1.14 1.71
Heights over 6' to 12', includes 1.2 SF of plyform, 2.5 BF of lumber and allowance for nails, ties and oil.
  1 use F5@.160 SFCA 3.28 7.58 10.86
  3 uses F5@.110 SFCA 1.76 5.21 6.97
  5 uses F5@.100 SFCA 1.46 4.74 6.20
  Add for 1 side battered F5@.016 SFCA .33 .76 1.09
  Add for 2 sides battered F5@.024 SFCA .66 1.14 1.80
Heights over 12' to 16', includes 1.2 SF of plyform, 3.0 BF of lumber and allowance for nails, ties and oil.
  1 use F5@.180 SFCA 3.58 8.53 12.11
  3 uses F5@.130 SFCA 1.92 6.16 8.08
  5 uses F5@.110 SFCA 1.58 5.21 6.79
  Add for 1 side battered F5@.016 SFCA .36 .76 1.12
  Add for 2 sides battered F5@.024 SFCA .72 1.14 1.86
Heights over 16', includes 1.3 SF of plyform, 3.5 BF of lumber and allowance for nails, ties and oil.
  1 use F5@.199 SFCA 4.02 9.43 13.45
  3 uses F5@.140 SFCA 2.13 6.63 8.76
  5 uses F5@.119 SFCA 1.76 5.64 7.40
  Add for 1 side battered F5@.016 SFCA .40 .76 1.16
  Add for 2 sides battered F5@.024 SFCA .80 1.14 1.94
Architectural form liner for wall forms
  Low cost liners F5@.020 SFCA 1.65 .95 2.60
  Average cost liners F5@.100 SFCA 2.50 4.74 7.24

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