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176 PROFILED SHEET FOR COMPOSITE FLOOR SLABS
• Nature of permanent supports: As section E20.
• Manufacturer: Contractor's choice..
- Product reference: Contractor's choice.
• Material: Galvanized steel sheet to BS EN 10326.
- Thickness: site specific.
- Designation: site specific.
• Metal accessories: Provided by sheet manufacturer unless otherwise indicated:
- Edge trims and restraint straps;
- Side closure pieces;
- End closures; and
- End diaphragms.
- Finish: As for sheet.
• Seam stitching:
- Fixings/ centres: site specific.
- Coating applied by manufacturer: Galvanized.

FABRICATION

180 NOTIFICATION OF COMMENCEMENT
• Notice: Give notice before fabrication is due to start.
Period of notice (minimum): Five working days.

WELDING

255 SITE WELDING
• Usage: Permitted only where indicated on drawings.
• Working conditions: Suitable and safe. Do not weld when surfaces are wet or when
ambient temperature is below 0°C.

BOLT ASSEMBLIES

370 GALVANIZED COATING TO BOLT ASSEMBLIES
• Standard: To BS 7371-6.
• Galvanizing: Applied by fastener manufacturer. Passivated and lubricated if no
additional coatings are specified. Nuts tapped after galvanizing.
• Use/ location: All shop and site connections in shop painted steelwork.

390 SEALED HOLLOW SECTIONS
• Holes: Sealed to prevent access of moisture.
- Method of sealing: Submit proposals.

ERECTION

410 PRE-ERECTION CHECKS
• Scope: At least 7 days before proposed erection start date, check the following:
- Foundations and other structures to which steelwork will be attached: Accuracy
of setting out.
- Holding down bolts: Position, protruding length, slackness and condition.
• Inaccuracies and defects: Report without delay.
• Permission to commence erection: Obtain.

RotF generic (intermediate) NBS 2014 6118-AEW-XX-XX-NBS-A-01