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410 PRECAST REINFORCED CONCRETE STEM WALLS
• Manufacturer: Contractor's choice.
- Product reference: Contractor's choice .
- Sizes: site specific.
- Weight: site specific.
- Special shapes: site specific.
- Accessories: site specific.
• Substrate: Concrete foundations as section E10, site specific thickness.
• Facing: site specific.

420 PLACING PRECAST REINFORCED CONCRETE STEM WALLS
• Installation:
- Perpends: Aligned.
- Joints: site specific.
- Securing: site specific.
• Backfill: Compact in layers maximum 200 mm deep.

520 TIMBER RETAINING WALLS
• Type: Log poles or sleepers - site specific.
• Size:
- Overall length: site specific.
- Cross section: site specific.
- Preservative treatment: site specific.
• Substrate: Concrete footing and surround, site specific thickness.

550 ERECTING TIMBER RETAINING WALLS
• Components: To line and level, edges abutting and vertical to front face.
- Depth below ground level: 50% of component length.
- Securement: Minimum 2 hours after placing concrete surround, tie components
together with 5 mm galvanized steel wire and 5 mm fencing staples positioned
approximately 100 mm below soil line.
- Trimming: Cut to site specific height above soil level.
• Tie-backs: Required at site specific centres.
• Backfill: Compact in layers maximum 150 mm deep.

560 HARD LANDSCAPING MATERIALS SPECIFICATION
• Minimum 'BRE Green Guide to Specification Online' rating: site specific.

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