Welding shall be carried out by qualified personnel and to the satisfaction of the Engineer.
The heat control techniques shall be such as to ensure that the flame cut surfaces of steel are free from cracks, local hardness and any defects which would be detrimental to the finished work.
Paint for the protection of structural steelwork shall be approved by the Engineer and used strictly in accordance with the manufacturer's instructions.
The Contractor shall submit for approval a three-coat painting system. The minimum total dry film thickness of the complete system should be 200 microns.
Before painting, the Contractor must ensure that all dust, grease and other contaminants are removed from the surface.
Where the paint is damaged back to bare steel, this should be either power wire-brushed or shot-blasted, then painted as specified above.
Steel surfaces which will have concrete cast against them shall be left unpainted. The surfaces shall be thoroughly wire brushed to remove loose rust, mill scale and surface contamination.