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Gateway Park Center PERKINS+WILL <br /> 810495.000 <br /> 12/06/18 <br /> <br /> <br />CEMENT PLASTERING <br /> 09 24 00 - 5 <br /> <br /> <br />1. Install lath-type, external-corner reinforcement at exterior locations. <br />2. Install lath-type, interior-corner reinforcement at interior locations. <br />C. Control Joints: Locate as approved by Architect for visual effect and as follows: <br />1. As required to delineate plasterwork into areas (panels) of the following <br />maximum sizes: <br />a. Vertical Surfaces: 144 sq. ft. <br />b. Horizontal and Other Nonvertical Surfaces: 100 sq. ft. <br />2. At distances between control joints of not greater than 18 feet o.c. <br />3. As required to delineate plasterwork into areas (panels) with length -to-width <br />ratios of not greater than 2-1/2:1. <br />4. Where control joints occur in surface of construction directly behind plaster. <br />5. Where plasterwork areas change dimensions, to delineate rectangular-shaped <br />areas (panels) and to relieve the stress that occurs at the corner formed by <br />the dimension change. <br />3.5 PLASTER APPLICATION <br />A. General: Comply with ASTM C 926. <br />1. Do not deviate more than plus or minus 1/4 inch in 10 feet from a true plane <br />in finished plaster surfaces when measured by a 10-foot straightedge placed <br />on surface. <br />2. Finish plaster flush with metal frames and other built-in metal items or <br />accessories that act as a plaster ground unless otherwise indicated. Where <br />casing bead does not terminate plaster at metal frame, cut base coat free <br />from metal frame before plaster sets and groove finish coat at junctures with <br />metal. <br />3. Provide plaster surfaces that are ready to receive field -applied finishes <br />indicated. <br />B. Walls; Base-Coat Mixes for Use over Metal Lath: For scratch and brown coats, for <br />three-coat plasterwork with 3/4-inch total thickness, as follows: <br />1. Portland cement mixes. <br />C. Soffits; Base-Coat Mixes for Use over Metal Lath: For scratch and brown coats, for <br />three-coat plasterwork and having 1/2-inch total thickness, as follows: <br />1. Portland cement mixes. <br />D. Plaster Finish Coats: Apply to provide float finish to match Architect's sample. <br />3.6 PLASTER REPAIRS <br />A. Repair or replace work to eliminate cracks, dents, blisters, buckles, crazing and <br />check cracking, dry outs, efflorescence, sweat outs, and similar defects and where <br />bond to substrate has failed.