Part 2 MATERIALS
Construct of wood, metal or other matelials as approved by the Architect and of sufficient thickness to withstand the pressure of newly placed concrete without excessive and objectionable bow or deflection.
Forms for flat exposed finished surfaces: Construct of five ply 60-60 plastic faced Douglas fir plywood, Concrete Form Grade. Thickness of form plywood 5/8 inch minimum, and as recommended by the American Plywood Association's "Guide to Plywood for Concrete Form".
Cylindrical Columns and Supports: Form round-section members with paper or fiber tubes, constructed of laminated plies using water resistant adhesive with wax-impregnated exterior to weather and moisture protection. Provide units with sufficient wall thickness to resist loads imposed by wet concrete without deformation.
Curved Forms: Curved surfaces shall be built up with band-sawn two-inch stringers, sized and carefully fitted to desired form, with segmental backing. Inside face shall be sheet metal, oil-tempered hardboard, or wherever possible, Y4 inch waterproof plywood facing.
Non-staining mineral oil.
Use factory fab11cated snap-off metal ties that will prevent form deflection. With
snap-off part removed, tie end shall be minimum of I inch from concrete surface, and shall leave a maximum I-inch diameter hole in concrete surface.
Part 3 -- EXECUTION
Forms shall conform to the shape, lines and dimensions of the concrete as shown on the drawings. The centering shall be true and rigid, thoroughly braced both horizontally and diagonally, sufficiently strong to carry the dead weight of the construction, as liquid, as well as lateral loads, without deflection. Fabricate for easy removal without hammering or prying against concrete surface.
All plywood fmIDs shall be thoroughly cleated and tied together with approved corrosion-resistant devices and all edges of fmIDs shall be supported and securely fastened. Provide temporary openings when interior areas of formwork are 2