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40-27 BUILDING <br />CAST -IN -PLACE CONCRETE I <br />BRPH ARCHITECTS -ENGINEERS, INC. <br />G. Provide temporary openings for cleanouts and inspection ports where interior area of <br />formwork is inaccessible. Close openings with panels tightly fitted to forms and <br />securely braced to prevent loss of concrete mortar. Locate temporary openings in <br />forms at inconspicuous locations. <br />H. Chamfer exterior corners and edges of permanently exposed concrete. <br />Form openings, chases, offsets, sinkages, keyways, reglets, blocking, screeds, and <br />bulkheads required in the Work. Determine sizes and locations from trades providing <br />such items. <br />Clean forms and adjacent surfaces to receive concrete. Remove chips, wood, <br />sawdust, dirt, and other debris just before placing concrete. <br />K. Retighten forms and bracing before placing concrete, as required, to prevent mortar <br />leaks and maintain proper alignment. <br />L. Coat contact surfaces of forms with form -release agent, according to manufacturer's <br />written instructions, before placing reinforcement. <br />3.2 EMBEDDED ITEMS <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's "Code of Standard Practice for Steel <br />Buildings and Bridges." <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 />supports 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 material will not be acceptable for <br />exposed surfaces. Apply new form -release agent. <br />C06922.001.00 03 30 04 - 10 <br />05-22-14 , <br />