This requirement for reinforcement is excerpted from the specification for concrete work.
Materials
Reinforcement bars shall conform to the requirements from the following specifications:
- ASTM A 615M: Specification for deformed and plain billet steel bars for concrete reinforcement.
- ASTM A 706M: Specification for low-alloy steel deformed and plain bars for concrete reinforcement.
- ASTM A 996M: Specification for rail- steel and axle-steel deformed and plain bars for concrete reinforcement.
Types of reinforcement bars will be identified on the contract drawings as a prefix to the bar diameter. The prefixes have the following meaning:
- Rail-steel reinforcement bars marked with letter R for this type of steel.
- Deformed bars are marked with the letters S and W for type of bars. They are having yield strength not exceeding 410 MPa (4100kg/sq.cm)
The source of supply for all materials shall be approved by the Engineer before these materials are delivered o the site.
Reinforcement shall be stored clear of working areas and supported above the surface of the ground, and shall be protected from damage and from deterioration due to exposure.
Reinforcement hooks and bends shall comply with the relevant requirement of American Code. The Contractor shall prepare bar bending schedules, copies of which will be made available to the Quantity Surveyor for his assistance during any re-measurement of reinforcement.
Reinforcement not readily identifiable as to the required quality will be liable to rejection.
Test Certificates
The Contractor shall supply the Engineer with a test certificate fro the steel manufacturer showing compliance with specification requirements.
One tension test ad one bed test shall be made for each incremental lot of 50 tonnes (bar size distinction not necessary) supplied for the works, or as frequently as required by the Engineer. In addition, one re-bend test shall be conducted for each incremental lot of 100 tonnes delivered to site.
