General requirements

033233 Submittals

Submit manufacturer's certified test date showing the following characteristic for reinforcing bars and wires for approval by the Engineer prior to placing order for reinforcement.

• 
  Ultimate tensile stress
  
• 
  Yield point stress
  
• 
  Elongation
  
• 
  Cold bend test
  

In the instance that certified test data is not issued, tests shall be made to verify the above properties. The criteria for the acceptance of the above test results shall be those required by ES. C. 07.101.

03324 Delivery & Storage

Reinforcement shall be delivered in sufficient quantities prior to start of concrete work, to ensure that no constructed formwork lies idle and exposed to weather due to reinforcement not being placed in position.

Reinforcement shall be stored in an off the ground position to prevent rust by contact with soil, dampness and other objectionable materials.
0333 Execution
03331 Preparation

Formwork and conditions under which reinforcement is to be placed shall be examined and corrected prior to the placement of concrete.

03332 Tolerances

The cover to reinforcement as shown in the Cast in place Section of this Specification shall be maintained.

03333 Placement

The placement of reinforcement and supports shall comply with the requirements of the Standards and Codes of Practice.

Reinforcement shall be cleaned to remove loose rust and mill scale, earth, loose rush, oil, grease and other material which are likely to reduce bond with concrete.
Reinforcement shall be secured against displacement by formwork construction or concrete placement. Reinforcement shall be supported by metal chairs, runners or concrete spacers meeting the required concrete cover thickness.
Reinforcement bars and supports shall be tied in 1.6mm mild steel wire. The bars shall be accurately placed as shown on drawings and their positions maintained during all operations.
Splices shall be provided by lapping ends, placing bars in contact and tying tightly with wire.
Fabric reinforcement shall be laid as long as practicable and joints lapped at least one full mesh.

No concrete shall be cast until reinforcement has been checked and approved by the Engineer.

0334 METHODS OF MEASUREMENT

Reinforcement work shall be understood as including cutting, bending, placing in position, tie and spacers.

Reinforcement shall be measured by the net weight of the bars & set in position with out allowance for ties and spacers.
Allowance shall be made for overlaps only if indicated on drawings & schedules or at overlaps of bars where the length of the bar reaches the maximum standard production limit.
The unit weights of reinforcement bars shall be the official unit weight issued by the appropriate Ethiopian Authority.