1. Scope - This specification covers the precast concrete components for the use in meter boxes, valve and fire hydrant chambers.
2. Materials - These shall comply with all the requirements laid down in SABS 677-1969 for cement, sand, aggregate, reinforcement and water.
3. General - These chambers may have the cast iron cover cast in or a concrete cover may be used.
4. Dimensions - The actual dimensions shall not differ by more than the following values: Wall thickness - 3mm.
5. Deviation from straightness - This shall not deviate by more than 5mm per metre of length.
6. End Squareness - The maximum deviation from end squareness of the ends shall not exceed 6mm.
7. Cover - The minimum thickness of the cover over all reinforcement shall be 10mm.
8. Resistance to Proof Load - These valve boxes and chambers shall support a point load of 35KN spread over an area of 200 x 200 mm without showing any signs of failure.
9. Marking - The following information shall be indelibly marked on the boxes and covers:

a. The manufacturer's trade name.
b. The date of manufacture