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415 STEEL BEAMS/ NEEDLES
• Steel designation: To BS EN 10025-2: - site specific.
• Details:
- Section: Submit proposals.
- Lengths: Submit proposals.
• Protection: site specific.
• Concrete surround: site specific.
• Hard packing:
- Depth: site specific.
- Material: site specific.
Curing period (minimum): site specific.

418 PROPRIETARY COATING FOR STEELgenerally
• Purpose: Protection against corrosion.
• Manufacturer: Contractor's choice.
- Product reference: site specific.
• Surface preparation, primer and finishing coats: As recommended by coating
manufacturer to suit ground and water conditions on site.
• Adhesion test: Required.

420 IN SITU CONCRETE WALL BEAMS
• Steel stools: site specific.
• Concrete: site specific.
- Immature concrete: Protect from drying, frost and loading for a minimum period
of site specific.
- Extend period to allow for inclement weather.
• Cover to reinforcement (minimum): site specific.
• Hard packing:
- Depth: site specific.
- Material: site specific.
• Curing period (minimum): site specific.

425 STEEL STOOLS
• Manufacturer: Contractor's choice.
- Product reference: site specific.
• Protection: Required.
• Precast concrete spreaders:
- Size: site specific.
• Bedding/ Packing: Mortar as section Z21.
- Mix: site specific.

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