General Construction Specifications
PART 1 - GENERAL
01 SECTION INCLUDES
A. Steel reinforcing for cast-in-place concrete, as indicated on plans, specified herein or otherwise required for proper completion of the work.
B. Support chairs, bolsters, spacers and ties for reinforcing.
C. Welded wire mesh.
02 REFERENCE STANDARDS
A. Abbreviations and acronyms for reference standards are defined in Section 01090.
B. ACI 301 - Specifications for Structural Concrete for Buildings.
C. ACI 315 - Details and Detailing for Concrete Reinforcement.
D. ACI 350 - Concrete Sanitary Engineering Structures.
E. ANSI/ASTM A82 - Cold Drawn Steel Wire for Concrete Reinforcement.
F. ANSI/ASTM A185 - Welded Steel Wire Fabric for Concrete Reinforcement.
G. ANSI/AWS D1.4 - Structural Welding Code Reinforcing Steel.
H. ASTM A615 - Deformed and Plain Billet Steel Bars for Concrete Reinforcement.
I. CRSI - Manual of Standard Practice.
J. CRSI 63 - Recommended Practice for Placing Reinforcing Bars.
K. CRSI 65 - Recommended Practice for Placing Bar Supports, Specifications and Nomenclature.
1.02 QUALITY ASSURANCE
A. Perform concrete reinforcement work in accordance with CRSI Manual of Standard Practice and Documents 63 and 65.
B. Conform to ACI 301 and 315.
1.03 SUBMITTALS
A. Submit the following in accordance with Section 01340.
B. Certification: Provide, upon request, a certificate from manufacturer that materials designated by reference to ASTM and ACI standards meet the requirements of these agencies latest edition.
C. Shop drawings for fabrication, bending and placement of reinforcing.
1. Comply with ACI 315 "Manual of Standard Practice for Detailing Reinforced Concrete Structures".
2. Show bar schedules, beam elevations, stirrup spacing, diagrams of bent bars and arrangement of concrete reinforcing. Indicate location and length of splices.
3. Show schematic elevations of reinforced cast-in-place concrete walls at 1/4" = 1'-0".
4. Reproduction of structural drawings for shop drawings will not be permitted. Submittal will be returned unreviewed.
PART 2 - PRODUCTS
03 MATERIALS
A. Reinforcing Steel: ASTM A615, Grade 60, deformed bars.
1. Finish: Uncoated.
B. Welded Wire Fabric: ANSI/ASTM A185 plain type, in flat sheets or coiled rolls.
1. Finish: Uncoated.
C. Steel Wire: ASTM A82, plain, cold-drawn steel.
D. Supports for Reinforcement: Use wire bar type supports complying with CRSI recommendations unless otherwise acceptable.
1. For slabs-on-grade, use supports with sand plates or horizontal runners where base material will not support chair legs.
2. For exposed-to-view concrete surfaces, where legs of supports are in contact with forms, provide supports with legs which are plastic protected, (CRSI, Class I) or stainless steel protected (CRSI, Class II).
3. Concrete brick may be used to support reinforcement to obtain proper clearance from earth.
B. Tie Wire: Minimum 16 gage annealed type.
PART 3 - EXECUTION
04 INSTALLATION
A. Comply with Concrete Reinforcing Steel Institute's recommended practice for "Placing Reinforcing Bars", for details and methods of reinforcement placement and supports, and as herein specified.
B. Clean reinforcement of loose rust and mill scale, earth, ice, and other materials which reduce or destroy bond with concrete.
C. Accurately position, support and secure reinforcement against displacement by formwork, construction, or concrete placement operations. Locate and support reinforcing by metal chairs, runners, bolsters, spacers, and hangers, as required.
D. Place reinforcement to obtain at least minimum coverages for concrete protection. Arrange, space and securely tie bars and bar supports to hold reinforcement in position during concrete placement operations. Set wire ties so ends are directed into concrete, not toward exposed concrete surfaces.
E. Bend reinforcing bars cold. Do not heat bars with a torch.
F. Weld rebar only if specifically permitted by Engineer. Accomplish welding per AWS "Recommended Practices for Welding Reinforcing Steel, Metal Inserts, and Connections in Reinforced Concrete Construction".
G. Install welded wire fabric in as long lengths as practicable. Lap adjoining pieces at least one full mesh and lace splices with wire. Offset end laps in adjacent widths to prevent continuous laps in either direction. Place wire mesh in the top third of the slab thickness.
END OF SECTION
