specs

2.08. MANUFACTURED UNITS
A. Round column forms: waterproof fiber forms constructed of spiral laminated plies of fiber.
1. Inside of forms shall be lined to prevent spiral markings on concrete.
Section 03100
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2.09. ACCESSORIES
A. Form ties: bolt rods or patented devices of sufficient strength to withstand pressure due to wet concrete (3000
lbs. minimum tensile strength); adjustable in length, and removable to a depth of at least 1 inch from the face
of the concrete.
1. Ties for exposed concrete surfaces shall be equipped with plastic cones 5/8 inch in diameter.
2. Do not use wire ties, or makeshift ties that leave unsightly marks or depressions on the face of the
concrete.
B. Form oil: non-staining, paraffin-base oil having specific gravity of between 0.8 and 0.9; shall not prevent
bonding of finish materials; shall not stain surface of concrete.
C. Form release agent: non-staining, chemically inert, biobased
1. Biobased Content: Minimum 85 percent soy-based oil or other biobased material.
2. Toxicity/IEQ: Zero or Low VOC.
3. Example product: Synthex by Industrial Synthetics Corp.
D. Form sealer
1. Toxicity/IEQ: Zero or Low VOC.
2. Example product: Formfilm by W.R. Grace Co.
PART 3 - EXECUTION
3.01. DESIGN AND CONSTRUCTION
A. Design forms to withstand pressure and weight of wet concrete without bulging or excessive deflection.
Comply with ACI 318.
B. Construct forms to required shapes, lines and dimensions; provide necessary studs, walers, ties, centering,
molds and supports.
1. Forms shall be sufficiently tight to prevent leakage of mortar.
2. Construct forms to be easily removable without damage to finished surfaces.
3. Forms shall not have unsightly marks or deformations on exposed faces.
4. Thoroughly clean forms of concrete laitance before re-use.
5. Provide clean-outs at the base of vertical forms for removal of foreign materials before placement of
concrete.
C. Support of forms: provide adequate shoring under forms to support loads imposed by wet concrete,
equipment and workmen.
1. Shores shall be sufficiently strong and closely spaced to prevent excessive deflections or distortion
during placement of concrete.
2. Comply with ACI 347.
D. Tying of forms: provide sufficient form ties to prevent bulging or collapse of forms under weight of wet
concrete.
1. Place ties in a uniform and orderly pattern.
2. Lubricate ties to prevent bonding with concrete.
E. Special features: place in forms any wood strips, blocking, molding, and liners necessary to produce required
shapes.
1. Attach feature strips to forms in a manner that will not leave unsightly marks on exposed concrete
surfaces.
2. Coat wood strips, blocking and molding with form sealer.
3. Provide chamfer strips in corners of formwork.
F. Coatings:
1. Coat contact surfaces of wood forms for un-exposed concrete surfaces with form oil.
2. Coat contact surfaces of wood forms for exposed surfaces with form release agent before each use.
G. Construction joints:
1. Locate construction joints only where required as shown on submittals.
a. Do not locate construction joints between lateral bracing elements of walls and columns.
b. Locate construction joints in slabs approximately at midspan between supports.
c. Construction joints shall be plumb and level. In order to avoid irregular lines at horizontal
NAPA CENTURY CENTER XD 12
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