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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />~ ng <br />.....,.vv <br /> <br />04/08 <br /> <br />B. Formwork, mixtures and concrete placement workmanship shall be such <br />that concrete surfaces, when exposed, will require only minimal finishing <br />with no excess honeycombing, voids or irregular color lines. <br /> <br />FORMS <br /> <br />A. Forms shall be used for all concrete masonry, including footings. Forms <br />shall be so constructed and placed that the resulting concrete will be of <br />the shape, lines, dimensions, appearance, and to the elevations indicated <br />on the Drawings. <br /> <br />B. Forms shall be made of wood, metal, or other approved material. Wood <br />forms shall be constructed of sound lumber or plywood of suitable <br />dimensions, free from knotholes and loose knots; where used for exposed <br />surfaces, boards shall be dressed and matched. Plywood shall be <br />sanded smooth and fitted with tight joints between panels. Metal forms <br />shall be of an approved type for the class of work involved and of the <br />thickness and design required for rigid construction. <br /> <br />C. Edges of all form panels in contact with concrete shall be flush within <br />1/32-inch and forms for plane surfaces shall be such that the concrete will <br />be plane within 1/16-inch in 4 feet. Forms shall be tight to prevent the <br />passage of mortar and water and grout. <br /> <br />D. Forms for walls shall have removable panels at the bottom for cleaning, <br />inspection, and scrubbing-in of bonding paste. Forms for walls of <br />considerable height shall be arranged with tremies and hoppers for <br />placing concrete In a manner that will prevent segregation and <br />accumulation of hardened concrete on the forms or reinforcements above <br />the fresh concrete. <br /> <br />E. Molding or bevels shall be placed to produce a 3/4-inch chamfer on all <br />exposed projecting corners, unless otherwise shown on the Drawings. <br />Similar chamfer strips shall be provided at horizontal and vertical <br />extremities of all wall placements to produce "clean" separation between <br />successive placements as called for on the Plans. <br /> <br />F. Forms shall be sufficiently rigid to withstand vibration, to prevent <br />displacement or sagging between supports, and constructed so the <br />concrete will not be damaged by their removal. The Contractor shall be <br />entirely responsible for their adequacy. <br /> <br />G. Forms, including new pre-oiled forms, shall be oiled before reinforcement <br />is placed, with an approved nonstaining oil or liquid form coating having a <br />non-paraffin base. <br /> <br />03300-10 <br /> <br />06-5723 <br />