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M61 Intumescent coatings for fire protection of steelwork

PROTECTIVE COATING SYSTEMS

110 ON SITE COATING TO PRIMED STEELgenerally
• Use/ location: site specific.
• Fire resistance to BS 476-21: site specific.
• Preparation and priming: By steelwork contractor, as section G10.
- Primer: Zinc phosphate, as clause G10.
• Intumescent coat:
- Manufacturer: site specific.
Product reference: site specific.
- Finish: Non-visible areas: Basic, as clause 440 and Visible areas: Normal
decorative, as clause 450.
• Top sealer coat: Type recommended by intumescent coating manufacturer.
- Dry film thickness: As recommended by manufacturer.
- Colour: site specific.
• Bolt head/ nut protection: As main steelwork.

120 ON SITE COATING TO EXISTING STEELgenerally
• Use/ Location: site specific.
• Fire resistance to BS 476-21: site specific.
• Preparation: site specific.
• Primer:
- Manufacturer: site specific.
Product reference: site specific.
- Dry film thickness: As recommended by manufacturer.
• Intumescent coat:
- Manufacturer: site specific.
Product reference: site specific.
- Finish: Non-visible areas: Basic, as clause 440. and Visible areas: Normal
decorative, as clause 450.
• Top sealer coat: Type recommended by intumescent coating manufacturer.
- Dry film thickness: As recommended by manufacturer.
- Colour: site specific.
• Bolt head/ nut protection: As main steelwork.

GENERAL REQUIREMENTS

205 VALIDATION OF MATERIALS
• Project specific evaluation of intumescent coating materials:
- Standard: To BS 8202-2, clause 4.
- Test results: Submit on request.

210 WORKING PROCEDURES
• Standard: To BS 8202-2.
• Give notice: Before commencing surface preparation and coating application.
• Quality control: Record project specific procedures for surface preparation and
coating application.

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