Laserfiche WebLink
<br />n <br /> <br />L.J <br /> <br />n <br /> <br />L.J <br /> <br />n <br /> <br />LJ <br /> <br />n <br /> <br />LJ <br /> <br />II <br /> <br />LJ <br /> <br />n <br /> <br />LJ <br /> <br />II <br /> <br />L.J <br /> <br />n <br /> <br />u <br /> <br />II <br /> <br />LJ <br /> <br />r-l <br /> <br />L.J <br /> <br />n <br /> <br />L.J <br /> <br />n <br /> <br />LJ <br /> <br />n <br /> <br />L..J <br /> <br />n <br /> <br />LJ <br /> <br />n <br /> <br />LJ <br /> <br />n <br /> <br />LJ <br /> <br />n <br /> <br />LJ <br /> <br />n <br /> <br />LJ <br /> <br />n <br /> <br />LJ <br /> <br />3.06 FORMS <br /> <br />A. <br /> <br />Forms shall be used for all concrete masonry, including footings. Forms shall be so <br />constructed and placed that the resulting concrete will be of the shape, lines, dimensions, <br />appearance, and to the elevations indicated on the Drawings. <br /> <br />B. <br /> <br />Forms shall be made of wood, metal, or other approved material. Wood forms shall be <br />constructed of sound lumber or plywood of suitable dimensions, free from knotholes and <br />loose knots; where used for exposed surfaces, boards shall be dressed and matched. <br />Plywood shall be 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 thickness and design <br />required for rigid construction. <br /> <br />c. <br /> <br />Edges of all form panels in contact with concrete shall be flush within 1/32-inch and forms <br />for plane surfaces shall be such that the concrete will be plane within 1/16-inch in 4 feet. <br />Forms shall be tight to prevent the passage of mortar and water and grout. <br /> <br />D. <br /> <br />Forms for walls shall have removable panels at the bottom for cleaning, inspection, and <br />scrubbing-in of bonding paste. Forms for walls of considerable height shall be arranged <br />with tremies and hoppers for placing concrete in a manner that will prevent segregation and <br />accumulation of hardened concrete on the forms or reinforcements above the fresh <br />concrete. <br /> <br />E. <br /> <br />Molding or bevels shall be placed to produce a 3/4-inch chamfer on all exposed projecting <br />corners, unless otherwise shown on the Drawings. Similar chamfer strips shall be provided <br />at horizontal and vertical extremities of all wall placements to produce "clean" separation <br />between successive placements as called for on the Plans. <br /> <br />F. <br /> <br />Forms shall be sufficiently rigid to withstand vibration, to prevent displacement or sagging <br />between supports, and constructed so the concrete will not be damaged by their removal. <br />The Contractor shall be entirely responsible for their adequacy. <br /> <br />G. <br /> <br />Forms, including new pre-oiled forms, shall be oiled before reinforcement is placed with an <br />approved non-staining oil or liquid form coating having a non-paraffin base. <br /> <br />H. <br /> <br />Before form material is re-used, all surfaces in contact with concrete shall be thoroughly <br />cleaned, all damaged places repaired, all projecting nails withdrawn, all protrusions <br />smoothed and in the case of wood forms pre-oiled. <br /> <br />I. <br /> <br />Form ties encased in concrete shall be designed so that after removal of the projecting part, <br />no metal shall be within I-inch of the face of the concrete. That part of the tie to be <br />removed shall be at least II2-inch diameter or be provided with a wood or metal cone at <br />lease II2-inch in diameter and I-inch long. Form ties in concrete exposed to view shall be <br />the cone-washer type equal to the Richmond "Tyscru". Throughbolts or common wire <br />shall not be used for form ties. <br /> <br />3.07 PLACING AND COMPACTING <br /> <br />A. <br /> <br />B. <br /> <br />06/05 <br /> <br />Unless otherwise permitted, the work begun on any day shall be completed in daylight of <br />the same day. <br /> <br />Concrete is not to be placed until reinforcing steel, pipes, conduits, sleeves, hangers, <br />anchors and other work required to be built into concrete have been inspected and approved <br />by the Engineer. Remove water and foreign matter from forms and excavation. All soil <br />bottom for slabs and footings shall be approved by the Engineer before placing concrete. <br /> <br />03300-8 <br /> <br />03-4138.8 <br />