Fiberglass Concrete Form Ties

Form-tie assemblies for architectural concrete should permit tightening of forms and leave no metal closer to the surface than I-1/2 inches (38 mm) for steel ties and 1 inch (25 mm) for stainless tell ties. The ties should not be fitted with lugs, cones, washers, or other devices that will leave depressions in the concrete less than the diameter of the device, unless specified. Ties should be tight fitting or tie holes in the form should be sealed to prevent leakage at the holes in the form. If texture surfaces are to be formed, ties should be carefully evaluated as to fit, pattern, grout leakage, and aesthetics.

Ties and Inserts

Form ties and accompanying tie holes are an almost inescapable part of wall surface. Architects frequently tie holes into the visual design quality of the surface. If this is planned and any effects or materials other than those provided in the upper heading are desired, they should be clearly specified as to both location and type.

Where tie holes are to patched or fitted, the architect should specify the treatment desired, unless it has been shown on the pre-construction mock up.