Cast-in-place columns for tilt-up (cont.) Concrete columns are often designed as part of the entryway of a tilt-up building or to support lintel panels over a glass storefront. Both round and square freestanding columns are used. They must be formed and poured before the lintel panels are erected. Round columns are formed with plastic-treated fiber tubes (Sonotube is one manufacturer) that are peeled off when the concrete has cured. Square columns are usually formed with plywood and 2" x 4" wood braces or adjustable steel column clamps.
Strip off fiber forms and dismantle bracing, per LF of height [view picture]
  12" or 16" diameter CL@.075 LF — 3.03 — 3.03
  24" diameter CL@.095 LF — 3.84 — 3.84
Strip wood forms and dismantle bracing
  Per SF of contact area, no salvage CL@.011 SF — .44 — .44
Clean and stack column clamps CL@.098 Ea — 3.96 3.84 7.80
Sack and patch concrete column face P8@.011 SF .16 .50 — .66
Allowance for miscellaneous equipment rental (vibrators, compressors, hoses, etc.)
  Per CY of concrete in column — CY — — 2.50 2.50
Trash enclosures for tilt-up These usually consist of a 6" concrete slab measuring 5' x 10' and precast concrete tilt-up panels 6' high. A 6" ledger usually runs along the wall interior. Overall wall length is usually 20 feet. Cost for the trash enclosure foundation, floor slab and wall will be approximately the same as for the tilt-up foundation, floor slab and wall. The installed cost of a two-leaf steel gate measuring 6' high and 8' long overall will be about $460 including hardware.
Equipment Foundations Except as noted, no grading, compacting, engineering, design, permit or inspection fees are included. Costs assume normal soil conditions with no shoring or dewatering required and are based on concrete poured directly from the chute of a ready-mix truck. Costs will be higher if access is not available from all sides or if obstructions delay the work.
Craft@Hrs Unit Material Labor Equipment Total[]
Labor costs include the time needed to prepare formwork sketches at the job site, measure for the
  forms, fabricate, erect, align and brace the forms, place and tie the reinforcing steel and
  embedded steel items, pour and finish the concrete and strip, clean and stack the forms.
Reinforcing steel costs assume an average of #3 and #4 bars at 12" on center each way. Weights
  shown include an allowance for waste and laps.
Form costs assume 3 uses of the forms and show the cost per use when a form is used on the
  same job without being totally disassembled. Normal cleaning and repairs are included. No
  salvage value is assumed. Costs listed are per square foot of form in contact with the concrete,
  assume using #2 & Btr lumber
For scheduling purposes, estimate that a crew of 5 can set the forms and place and tie the reinforcing steel for and pour 8 to 10 CY of concrete equipment foundations in an 8-hour day.
Rule-of-thumb estimates The costs below are based on the volume of concrete in the foundation. If plans for the foundation have not been prepared, estimate the quantity of concrete required from the weight of the equipment using the rule-of-thumb estimating data below. Design considerations may alter the actual quantities required. Based on the type foundation required, use the cost per CY given in the detailed cost breakdown section which follows the table on the next page.
Estimating concrete quantity from the weight of equipment:
1. Rectangular pad type foundations —
  Boilers and similar equipment mounted at grade:
    Allow 1 CY per ton
  Centrifugal pumps and compressors, including weight of motor:
    Up to 2 HP, allow .5 CY per ton
    Over 2 to 10 HP, allow 1 CY per ton
    Over 10 to 30 HP, allow 2 CY per ton
    Over 30 HP, allow 3 CY per ton
  Reciprocating pumps and compressors, including weight of motor:
    Up to 2 HP, allow .75 CY per ton
    Over 2 to 10 HP, allow 1.5 CY per ton
    Over 10 to 30 HP, allow 2.5 CY per ton
    Over 30 HP, allow 4.5 CY per ton
2. Rectangular pad and stem wall type foundations — Horizontal tanks
  or shell and tube heat exchangers, allow 6 CY per ton
3. Square pad and pedestal type foundations — Vertical tanks not over 3' in diameter, allow 6 CY per ton
4. Octagonal pad and pedestal type foundations — Vertical tanks over 3' in diameter, allow 4 CY per
  ton of empty weight
    Over 2 to 10 HP, allow 1.5 CY per ton
    Over 10 to 30 HP, allow 2.5 CY per ton
    Over 30 HP, allow 4.5 CY per ton
2. Rectangular pad and stem wall type foundations — Horizontal tanks
  or shell and tube heat exchangers, allow 6 CY per ton
3. Square pad and pedestal type foundations — Vertical tanks not over 3' in diameter, allow 6 CY per ton
4. Octagonal pad and pedestal type foundations — Vertical tanks over 3' in diameter, allow 4 CY per
  ton of empty weight

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