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<br /> <br />THE CITY OF SUNNY ISLES BEACH <br />PROJECT NO. 21-1011 <br />BUILDING DEPARTMENT RELOCATION TO ANNEX <br /> <br />Project No. 21-1011 November 2024 031000 -12 <br />their position and shape under the loads and operations incident to placing and vibrating <br />the concrete. Suitable and effective means shall be provided on all forms for holding <br />adjacent edges and ends of panels and sections tightly together and in accurate alignment <br />so as to prevent the formation of ridges, fins, offsets, or similar surface defects in the <br />finished concrete. <br />B. Plywood, 5/8-inch and greater in thickness, may be fastened directly to studding if the <br />studs are spaced close enough to prevent visible deflection marks in the concrete. The <br />forms shall be tight so as to prevent the loss of water, cement, and fines during placing <br />and vibrating of the concrete. Specifically, the bottom of wall forms that rest on concrete <br />footings or slabs shall be provided with a gasket to prevent loss of fines and paste during <br />placement and vibration of concrete. Such gasket may be a 1- to 1-1/2-inch diameter <br />polyethylene rod held in position to the underside of the wall form. <br />C. The CONTRACTOR shall provide adequate clean-out holes at the bottom of each lift of <br />forms. The size, number, and location of such clean-outs shall be as acceptable to the <br />ENGINEER. Whenever concrete cannot be placed from the top of a wall form in a manner <br />that meets the requirements of the Contract Documents, form windows shall be provided <br />in the size and spacing needed to allow placement of concrete to the requirements of <br />SECTION 03300 Cast-in-Place Concrete. The size, number, and location of such form <br />windows shall be as acceptable to the ENGINEER. <br />3.5 FORM CONSTRUCTION: <br />A. Vertical Surfaces: All vertical surfaces of concrete members shall be formed, except where <br />placement of the concrete against the ground is indicated. Not less than 1-inch of concrete <br />shall be added to the indicated thickness of a concrete member, where concrete is <br />permitted to be placed against trimmed ground, in lieu of forms. Permission to do this on <br />other concrete members will be granted only for members of comparatively limited height <br />and where the character of the ground is such that it can be trimmed to the required lines <br />and will stand securely without caving or sloughing until the concrete has been placed. <br />B. Construction Joints: Concrete construction joints will not be permitted at locations other <br />than those indicated, except as may be acceptable to the ENGINEER. When a second lift <br />is placed on hardened concrete, special precautions shall be taken in the way of the <br />number, location, and tightening of ties at the top of the old lift and bottom of the new to <br />prevent any unsatisfactory effect whatsoever on the concrete. Pipe stubs and anchor bolts <br />shall be set in the forms where required. <br />C. Form Ties <br />1. Embedded Ties: Holes left by the removal of form tie cones shall be reamed with <br />suitable toothed reamers so as to leave the surface of the holes clean and rough <br />before being filled with mortar. Wire ties for holding forms will not be permitted. <br />No form-tying device or part thereof, other than metal, shall be left embedded in <br />the concrete. Ties shall not be removed in such manner as to leave a hole <br />extending through the interior of the concrete members. The use of snap-ties, <br />which cause spalling of the concrete upon form stripping or tie removal, will not <br />be permitted. If steel panel forms are used, rubber grommets shall be provided <br />where the ties pass through the form in order to prevent loss of cement paste. <br />Where metal rods extending through the concrete are used to support or to <br />strengthen forms, the rods shall remain embedded and shall terminate not less <br />than 1-inch back from the formed face or faces of the concrete.