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40-27 BUILDING <br />CAST -IN -PLACE CONCRETE 1 <br />BRPH ARCHITECTS -ENGINEERS, INC. <br />3.2 EMBEDDED ITEM INSTALLATION <br />A. Place and secure anchorage devices and other embedded items required for adjoining <br />work that is attached to or supported by cast -in -place concrete. Use setting drawings, <br />templates, diagrams, instructions, and directions furnished with items to be embedded. <br />Install anchor rods, accurately located, to elevations required and complying with <br />tolerances in Section 7.5 of AISC 303. <br />3.3 REMOVING AND REUSING FORMS <br />A. General: Formwork for sides of beams, walls, columns, and similar parts of the Work <br />that does not support weight of concrete may be removed after cumulatively curing at <br />not less than 50 deg F for 24 hours after placing concrete. Concrete has to be hard <br />enough to not be damaged by form -removal operations, and curing and protection <br />operations need to be maintained. <br />1. Leave formwork for beam soffits, joists, slabs, and other structural elements that <br />support weight of concrete in place until concrete has achieved at least 70 <br />percent of its 28-day design compressive strength. <br />2. Remove forms only if shores have been arranged to permit removal of forms <br />without loosening or disturbing shores. <br />B. Clean and repair surfaces of forms to be reused in the Work. Split, frayed, <br />delaminated, or otherwise damaged form -facing materials are not acceptable for <br />exposed surfaces. Apply new form -release agent. <br />C. When forms are reused, clean surfaces, remove fins and laitance, and tighten to close <br />joints. Align and secure joints to avoid offsets. Do not use patched forms for exposed <br />concrete surfaces unless approved by Engineer. <br />3.4 SHORING AND RESHORING INSTALLATION <br />A. Comply with ACI 318 and ACI 301 for design, installation, and removal of shoring and <br />reshoring. <br />Do not remove shoring or reshoring until measurement of slab tolerances is <br />complete. <br />B. Plan sequence of removal of shores and reshore to avoid damage to concrete. Locate <br />and provide adequate reshoring to support construction without excessive stress or <br />deflection. <br />3.5 VAPOR -RETARDER INSTALLATION <br />A. Sheet Vapor Retarders: Place, protect, and repair sheet vapor retarder according to <br />ASTM E 1643 and manufacturer's written instructions. <br />C06922.001.00 03 30 00 - 10 <br />05-22-14 <br />