|Wall forms (cont.) 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.|
|Reveal strips 1" deep by 2" wide, one-piece, wood.|
|Blockouts for openings. Form area is the opening perimeter times the depth. These figures assume that nails and form oil costing $.25 per square foot, 1.2 SF of plyform and .5 board feet of lumber are used per SF of form. Blockouts usually can be used only once.|
|Bulkheads or pour-stops. These costs assume that nails, form oil and accessories, 1.1 SF of plyform and 1 board foot of lumber are used per SF of form.|
|Add for keyed wall joint, two-piece, tapered, 1.2 BF per SF.|
|Curved wall forms|
|Smooth radius, add to straight wall cost||F5@.032||SFCA||.82||1.52||2.34|
|8' chord sections, add to straight wall cost||F5@.032||SFCA||.49||1.52||2.01|
|Haunches or ledges. Area is the width of the ledge times the length. These costs assume nails, form oil and accessories, 2 SF of plyform, and .5 board foot of lumber are used per SF of ledge.|
|Steel-framed plywood forms Rented steel-framed plywood forms can reduce forming costs on many jobs. Where rented forms are used 3 times a month, use the wall-forming costs shown for 3 uses at the appropriate height but deduct 25% from the material cost and 50% from the labor manhours and labor costs. Savings will be smaller where layouts change from one use to the next, when form penetrations must be made and repaired before returning a form, where form delivery costs are high, and where non-standard form sizes are needed. For more detailed coverage of steel-framed plywood forms, see National Concrete & Masonry Estimator, http://CraftsmanSiteLicense.com|
|Column forms for square or rectangular columns Quantities in parentheses show the cross-section area of a square column. When estimating a rectangular column, use the costs for the square column with closest cross-section area. For scheduling purposes estimate that a crew of 5 can lay out, fabricate and erect about 550 to 600 SFCA of square or rectangular column forms in an 8-hour day.|
|Up to 12" x 12" (144 square inches), using nails, snap ties, oil and column clamps with 1.15 SF of plyform and 2 BF of lumber per SFCA|
|Over 12" x 12" to 16" x 16" (256 square inches), using nails, snap ties, oil and column clamps, with 1.125 SF of plyform and 2.1 BF of lumber per SFCA|
|Over 16" x 16" to 20" x 20" (400 square inches), using nails, snap ties, oil and column clamps, with 1.1 SF of plyform and 2.2 BF of lumber per SFCA|
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