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CASCADE HIGH SCHOOL SYNTHETIC TURF FIELD <br /> EVERETT PUBLIC SCHOOLS 09/12/2013 <br /> A. Prepare subgrade according to Section 02860 of these specifications. Compact subgrade to 95% <br /> maximum dry density per ASTM D1557, modified Proctor, prior to placement of crushed rock <br /> base courses. <br /> 3.3 Forms: <br /> A. Place forms to conform to shapes, lines and dimensions shown on drawings. Hold lines plumb, <br /> straight and true. Make forms tight to prevent leakage. Forms previously used shall be <br /> thoroughly cleaned of all dirt,mortar, and foreign matter before being used. Piecing form boards <br /> with narrow battens or scabs,to compensate for insufficient board width shall not be permitted. <br /> B. Forms shall be held rigidly in place by steel stakes and shall be of sufficient strength to resist <br /> springing out of shape during the placing of concrete. Ties, clamps, spreaders and braces shall be <br /> used where required to ensure rigidity of the forms. <br /> C. Leave forms in place for sufficient length of time to insure rigidity and safety of construction. <br /> 3.4 Base Course: <br /> A. Install crushed surface rock base course on six-inch compacted depth, maintain finish grade of <br /> base course,and compact to 95%maximum dry density. Base Course will be a minimum of 4". <br /> B. Base course will be tested prior to installation of any concrete. Any areas not meeting <br /> specification will be re-worked and checked again before notice to proceed is given. <br /> 3.5 Reinforcement: <br /> A. Reinforcing: Accurately place all concrete reinforcing secure in position and support by concrete <br /> blocks, metal chairs, spacers, or hangers to prevent displacement in excess of the following <br /> tolerances as shown on Detail Drawing. <br /> 3.6 Concrete Finishing: <br /> A. Prior to removal of face forms, the top surfaces shall be finished true to grade by means of <br /> straightedge float. Distribute concrete as required to remove surface irregularities and re-float <br /> repaired areas to provide a continuous, smooth finish. Grade tolerance shall be within 1/8"in ten <br /> feet as determined by a ten-foot straightedge placed anywhere on the curb in any direction. <br /> B. Expansion Joints shall be placed approximately twenty(20)feet on center. <br /> C. Control Joints will be %"width by%2" depth saw cut. Place control joints approximately five (5) <br /> feet on center. <br /> D. Finishes: Medium Broom finish(walking surfaces). <br /> 3.7 Curing:-- <br /> A. <br /> uring:A. Begin initial curing as soon as free water has disappeared from exposed surfaces. Where <br /> possible,keep continuously moist for not less than 72 hours. Continue curing by use of moisture- <br /> retaining cover or membrane-forming curing compound. Cure formed surfaces by moist curing <br /> until forms are removed. Provide protections as required to prevent damage to exposed concrete <br /> surfaces. <br /> 3.8 Form Removal: <br /> A. Forms will be removed while concrete is still sufficiently green to receive sacked finish but <br /> sufficiently cured to insure against loss of concrete strength or damage. <br /> 3.9 Workmanship: <br /> A. Work shall be done in a thorough manner, producing first class work in all respects. Provide <br /> uniform dense concrete of required strengths with uniform homogeneous color. Where concrete <br /> curb is exposed, correct all imperfections of material and workmanship to provide specified <br /> finished appearance. <br /> CAST-IN-PLACE CONCRETE 32 16 00-3 <br />