General requirements

1034 Nuts, bolts, screws and fasteners

Bolts, nuts and screws shall generally, be coated or produced from non-oxidizing metal. Screws, bolts and nuts shall be those recommended by the fabricators of the metal work.

Fasteners & cramps shall be galvanized or metal coated for protection against corrosion.

1035 Welding electrodes

Comply with the requirements of the Structural Steel section of this Specification.

104 EXECUTION

1041 Fabrication

Metal work shall be fabricated to be rigid, neat in appearance and free from defects, warp or buckle. Metals shall either be preformed or formed accurate to required profiles and sizes.

Metal works shall generally be assembled and fitted in the place of fabrication. The specific approval of the Engineer is required for the assembly of metal work at site. The various components of the cut metal work shall be accurately marked for identification, if assembly on site is allowed.

Metal units to receive hardware shall be prepared at the place of fabrication by cutting out, reinforcing, drilling and tapping. The installation procedure for hardware shall be as directed by the manufacturer.

Samples of installed hardware shall be inspected and approved by the Engineer prior to the fixing of hardware on metal work.
Metal work requiring priming shall be primed at the place of fabrication. The surface of metal shall be coated in zinc chromate or red oxide primers complying with ES D C1 001 & 010 respectively. Priming coats shall be applied by brush or gun sprayed to give adequate thickness coat and to fully fill pores. Priming shall be well worked into the surface, angles, corners & joints.
1042 Erection

Examine the locations where metal work is to be fixed and ensure that satisfactory preparations are made and necessary conditions fulfilled for the fixing of metal work.

Metal work shall generally be fixed in accordance with the manufacturers or fabricators instructions. Metal work shall be placed accurately in position, aligned, plumbed and leveled and temporarily braced securely until permanent fasteners are set.
Temporary braces and fasteners shall be removed only after metals work is securely fixed. Adequate care shall be taken to ensure that temporary braces do not damage the surface.
Where fixing lugs are embedded in concrete or masonry, the class of concrete to be used shall be that of the concrete against which fixing is to be done. If fixing is against other masonry, C-25 concrete shall be used.