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130 ERECTING CRIB WALLS
• Headers and all joints in the stretchers: Butted and vertically aligned.
• First row of stretchers: Position and retain with header units.
• Header support blocks: As recommended by crib wall manufacturer.
• Unit fill/ Backfill:
- To top of each course of stretchers as work proceeds.
- Compact in layers maximum 200 mm deep.

210 GABIONS
• Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
- Sizes: site specific.
- Mesh: site specific.
- Diaphragm: site specific.
• Fill to units:
- Material: site specific.
- Size/ grading: site specific.
• Substrate: Concrete as section E10, site specific thickness.
- Batter of wall face: Vertical.
• Geotextile: site specific.
• Other requirements: site specific.

230 BASTIONS
• Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
- Sizes: site specific.
- Mesh: site specific.
- Insert panel: site specific.
- Lining: Nonwoven geotextile.
• Fill material to units generally: site specific.
• Face fill material: site specific.
• Substrate: Existing granular bed cut to required batter.
- Batter of wall face: Front face vertically aligned.
• Other requirements: site specific.

240 GEOTEXTILE
• Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
- Permeability: site specific.
• Recycled content: site specific.
• Jointing:
- End and side laps: Minimum 300 mm.
• Timing: Do not lay more textile than will be covered in the same day.

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