Column forms for round columns Use the costs below to estimate round fiber tube forms (Sonotube is one manufacturer). Add the cost of column footings or foundations. These forms are peeled off when the concrete has cured. Costs shown include setting, aligning, bracing and stripping and assume that bracing and collars at top and bottom can be used 3 times. Column forms over 12'0" long will cost more per linear foot. Costs are per linear foot for standard weight column forms. Plastic lined forms have one vertical seam. For scheduling purposes, estimate that a crew of 5 can lay out, erect and brace the following quantities of 10' to 12' high round fiber tube forms in an 8-hour day: twenty 8" to 12" diameter columns; sixteen 14" to 20" columns and twelve 24" to 48" columns. For more detailed coverage of round column forms, see National Concrete & Masonry Estimator, http://CraftsmanSiteLicense.com
Bracing per LF (add to each cost below) [view picture] — LF .65 — .65
    8" spiral-type F5@.166 LF 1.46 7.86 9.32
10" spiral-type F5@.182 LF 2.06 8.62 10.68
12" spiral-type F5@.207 LF 2.48 9.81 12.29
14" spiral-type F5@.224 LF 6.04 10.60 16.64
16" spiral-type F5@.232 LF 10.10 11.00 21.10
20" spiral-type F5@.250 LF 10.80 11.80 22.60
24" spiral-type F5@.275 LF 10.90 13.00 23.90
30" spiral-type F5@.289 LF 36.30 13.70 50.00
36" spiral-type F5@.308 LF 40.60 14.60 55.20
    8" heavy-duty, water resistant F5@.166 LF 6.19 7.86 14.05
10" heavy-duty, water resistant F5@.177 LF 7.36 8.38 15.74
12" heavy-duty, water resistant F5@.207 LF 9.78 9.81 19.59
14" heavy-duty, water resistant F5@.224 LF 13.50 10.60 24.10
16" heavy-duty, water resistant F5@.232 LF 14.80 11.00 25.80
20" heavy-duty, water resistant F5@.250 LF 21.90 11.80 33.70
24" heavy-duty, water resistant F5@.275 LF 26.30 13.00 39.30
30" heavy-duty, water resistant F5@.289 LF 36.60 13.70 50.30
36" heavy-duty, water resistant F5@.308 LF 65.00 14.60 79.60
48" heavy-duty, water resistant F5@.334 LF 102.00 15.80 117.80
Column capitals for round columns
Use these figures to estimate costs for rented prefabricated steel conical-shaped capital forms. Costs assume a minimum rental period of 1 month and include an allowance for nails and form oil. Labor shown assumes the capital will be supported from the deck formwork above the capital and includes laying out and cutting the hole in the deck to receive the capital. Capital bottom diameter is sized to fit into the column tube form. The column form size (diameter) does not significantly affect the capital form rental cost. Dimensions shown below are the top diameter. Form weights are shown in parentheses. Only 3 uses of these forms are usually possible in a 30-day period. Setting forms and installing reinforcing steel takes one day, concrete placing takes another day, curing requires 7 to 10 days, removing and cleaning forms takes another day. For scheduling purposes estimate that a crew of 5 can lay out, cut openings in floor deck formwork and install an average of 8 or 9 round column capital forms in an 8-hour day.
3'6" (100 pounds) 1 use F5@4.01 Ea 227.00 190.00 417.00
3'6" (100 pounds) 3 uses F5@4.01 Ea 75.60 190.00 265.60
4'0" (125 pounds) 1 use F5@4.01 Ea 244.00 190.00 434.00
4'0" (125 pounds) 3 uses F5@4.01 Ea 81.60 190.00 271.60
4'6" (150 pounds) 1 use F5@4.30 Ea 253.00 204.00 457.00
4'6" (150 pounds) 3 uses F5@4.30 Ea 84.60 204.00 288.60
5'0" (175 pounds) 1 use F5@4.51 Ea 267.00 214.00 481.00
5'0" (175 pounds) 3 uses F5@4.51 Ea 95.00 214.00 309.00
5'6" (200 pounds) 1 use F5@4.51 Ea 306.00 214.00 520.00
5'6" (200 pounds) 3 uses F5@4.51 Ea 102.00 214.00 316.00
6'0" (225 pounds) 1 use F5@4.70 Ea 320.00 223.00 543.00
6'0" (225 pounds) 3 uses F5@4.70 Ea 101.00 223.00 324.00

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