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CONCRETE Ronfinued) <br />FORMWORK AND ACCESSORIES <br />Concrete construction shall conform toAC| 301 "Specifications for Structural Concrete" and the Building <br />Code, including testing procedures. See specifications and/or architectural documents for formwork <br />requirements. Installation shall adhere to ACI 301. Conduits and pipes of aluminum shall not be <br />embedded in concrete construction. <br />See architectural or civil drawings for exact locations and idimensions of openings in concrete.Sea <br />structural details for reinforcing around openings. <br />Concrete accessories and embedded items shall be coordinated with Architectural and all other Contract <br />Documents and suppliers' drawings before placing concrete, Wet -setting of anchor rods, reinforcing, <br />hardware, etc. is not allowed in concrete. Anchor rods, reinforcing, hardware,etc. shall befirmly tied in <br />place prior to concrete placement. Refer to Architectural documents for waterstops, damp proofing, and <br />soil retaining wall drainage requirements at concrete and atconcrete joints (construction joints, slab to <br />wall joints, curb bzslab joints, etd. <br />CURING AND FINISHES <br />Protect and cure freshly placed concrete pe/A[| 3051 in hot condidons,A[| 3061 in cold conditions, and <br />AC|J081 " Specification for Curing Concrete". All exposed edges and corners shall have 3/4" chamfer, <br />LINO. Concrete flatworkshall be sloped to provide positive drainage. Coordinate finish with architectural <br />contract documents. <br />At the time ofapplication of finish materials orspecial treatment to concrete, moisture content of <br />concrete shall conform torequirements infinish material specifications. Where vapor sensitive coverings <br />are to be placed on slabs on grade, conform strictly to slab covering manufacturer's recommendations <br />regarding vapor retarder and granular fill requirements below the dab. <br />CONCRETE CRACK MAINTENANCE <br />Cracking occurs in concrete structures due to inherent shrinkage, creep, and the restraining effects of <br />walls and other structural elements. Most cracking due to shrinkage and creep will likely occur over the <br />first two years of the life of the structure; further concrete movement due to variations in temperature may <br />persist. Cracks that result in water penetration will need to be repaired to protect reinforcing. Other <br />cracking may be repaired at the owner's discretion for aesthetical reasons or performance of applied <br />finishes. Prior to repairing cracks' o structural engineer should be consulted to provide direction on which <br />cracks to repair and on whether observed cracks may affect the strength of the structure. <br />REINFORCING STEEL <br />Reinforcing steel shall conform to ASTM A615 (including supplement Sl), Grade 60, Fy = 60,000 psi, except <br />any bars specifically sonoted onthe drawings shall beGrade 40,Fy=4lOOUpsi. <br />PROCEDURES <br />Reinforcing steel shall be detailed (including hooks and bends) in accordance with ACI 315 "Details and <br />Detailing nfConcrete Reinforcement^ Lap all reinforcement inaccordance with "The Reinforcing Splice <br />and Development Length Schedule" onthese documents. |ftable isnot provided'|apaUreinforcingby40 <br />bar diameters. Provide corner banU at and footing intersections, <br />' ' ' <br />Reinforcing steel shall be adequately supported to prevent displacement during concrete and grout <br />placement. Bars shall bebent cold. <br />Bars partially embedded in concrete shall not befield bent, unless specifically so detailed mapproved by <br />the SER. <br />Mechanical connection of continuous reinforcing bar shall be used where shown on documents and may <br />be substituted for lap splices if approved by the SER. Such connections shall develop at least 125% of the <br />specified yield strength of the bar. Acceptable connectors shall be the Erico Lenton Plus Standard Coupler <br />(ER-3967)' Dayton Superior Bar -Lock LSeries (ER'5064).orapproved equal. <br />Welding mtack welding ofreinforcing bars toother bars mtoplates, angles, etc, is prohibited, except <br />where specifically approved by the SER. Where welding is approved, it shall be done by AWS/WABO- <br />certified welders using E9018 or approved electrodes. Welding procedures shall conform to the <br />requirements of AWS D1.4. Any Grade 60 reinforcing bars indicated on drawings to be welded shall <br />conform toASTyW A706. Reinforcement complying with ASTM A615 (51) may be welded only if material <br />property reports indicating conformance with welding procedures specified in AWS D14are submitted. <br />Welding within 4^ of cold bends in reinforcing steel is not permitted. <br />P <br />�� <br />ROTH $*epPAnoARCHITECTS <br />1enovwAZEESTnEsrSUITE 1nV| oEMYER.CoLORADDan2no <br />UND <br />m� <br />� Hl� I . 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