OPEN_796_EAONE_LANDSCAPE_SPECIFICATION 10 Aug 2016 APPENDIX 9
720 SETTING POSTS IN CONCRETE • Standard: To BS 8500-2. • Mix: Designated concrete not less than GEN1 or Standard prescribed concrete not less than ST2.
• Alternative mix for small quantities: 50 kg Portland cement to 150 kg fine aggregate to 250 kg 20 mm nominal maximum size coarse aggregate, medium workability.
• Admixtures: Do not use. • Holes: Excavate neatly and with vertical sides. • Filling: Position post/ strut and fill hole with concrete to not less than the specified depth, well rammed as filling proceeds and consolidated.
• Backfilling of holes not completely filled with concrete: Excavated material, well rammed and consolidated.
730 EXPOSED CONCRETE FOUNDATIONS • Filling: Compact until air bubbles cease to appear on the upper surface. • Finishing: Weathered to shed water and trowelled smooth.
740 SETTING POSTS IN EARTH • Holes: Excavated neatly, with vertical sides and as small as practicable to allow refilling. • Filling: Position posts/ struts and replace excavated material, well rammed as filling proceeds.
750 DRIVEN POSTS • Damage to heads: Minimize. - Repair: Neatly finish post tops after installation.
760 NAILED WOOD RAILS • Length (minimum): Two bays, with joints in adjacent rails staggered. • Fixing: Nail each length of rail to each post with two 100 mm galvanized nails. • Rails with split ends: Replace.
770 SITE CUTTING OF WOOD • General: Kept to a minimum. • Below or near ground level: Cutting prohibited. • Treatment of surfaces exposed by minor cutting and drilling: Two flood coats of solution recommended for the purpose by main treatment solution manufacturer.
780 MAKING GOOD GALVANIZED SURFACES • Treatment of minor damage (including on fasteners and fittings): Low melting point zinc alloy repair rods or powders made for this purpose, or at least two coats of zinc-rich paint to BS 4652.
• Thickness: Apply sufficient material to provide a zinc coating at least equal in thickness to the original layer.
790 SITE PAINTING • Timing: Prepare surfaces and apply finishes as soon as possible after fixing.
COMPLETION
910 CLEANING • General: Leave the works in a clean, tidy condition. • Surfaces: Clean immediately before handover.
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