2022-06-24_PERMIT FILE - C1980007 (2)

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• PART 2 -PRODUCTS 2.01 Materials A. Wood Forms 1. Unexposed Concrete Surfaces -Wood forms for unexposed concrete surfaces shall be No. 2 common or better lumber. 2. Exposed Concrete Surfaces -Wood forms for exposed surfaces shall be plywood, or shall be shiplap or tongue and groove boards, of uniform thickness and width not exceeding 6 inches. 3. Smooth Surfaces -Wood forms for smooth concrete surfaces shall be made of plywood or shall have a form lining as specified in Part B below. 4. Plywood for forms shall be Commercial Douglas Fir, moisture- resistant, concrete-form plywood not less than 5-ply and at least 9/16" thick. B. Form Lining 1. Plywood -Plywood for form lining shall be Commercial Douglas Fir, - • concrete-form exterior, 3-ply, not less than 1/4" thick. 2. Fiberboard -Fiberboard for form lining shall conform to the require- - menu of Federal Specification LLL-F-311, Class B, not less than 3/16" thick. 3. Absorptive Type Lining -Absorptive type lining shall be a material or combination of materials highly absorptive to water, readily re- movable from the concrete surface at the end of the curing period. The material shall be easily cut for fitting, free from any element which may discolor the concrete or interfere with the normal chemical reaction• of the cement, and shall have an absorptive coefficient to eliminate voids and pitting while producing a dense and uniform concrete surface. C. Metal Forms 1. Metal forms shall be of a type approved by the Engineer that will produce surfaces equal to those specified for wood forms. 2. Holes shall be plugged and uneven surfaces eliminated in a manner approved by the Engineer. D. Form Coating • 1. Form coating shall be of a clear amber color and shall form a continuous, tough, hard film highly resistant to alkali and moisture. i ~ 2. The film shall not be deposited upon or absorbed within the concrete. 03100-2