Iron

The iron, both cast and wrought, and the rolled steel to be of the best quality and brands approved by the architect; and, except where bedded in concrete, to be painted two coats of granitic oxide before fixing.

Castings

All castings to be perfectly smooth, and free from flaws, sandholes, and other defects.

Provide all requisite patterns.

Wrought Iron

The wrought iron to bear an ultimate tensile stress of 22 tons per square inch of section, with a contraction of area at fracture of 18 per cent.

Steel

The steel to bear an ultimate tensile stress of not less than 27 or more than 32 tons per square inch of section, with a contraction of area at fracture of from 50 to 40 per cent. accordingly.

Testing

Suitable samples of the various sections of wrought iron and steel to be provided for testing.