OPEN_796_EAONE_LANDSCAPE_SPECIFICATION 10 Aug 2016 APPENDIX 9


530 CONCRETE FOR FOUNDATIONS, RACES AND HAUNCHING • Standard: To BS 8500-2. • Designated mix: Not less than GEN0 or Standard mix ST1. • Workability: Very low.


540 CEMENT MORTAR BEDDING • General: To section Z21. • Mix (Portland cement:sand): 1:3. - Portland cement: Class CEM I 42.5 to BS EN 197-1. - Sand: to BS EN 12620, grade 0/4 or 0/2 (MP). • Bed thickness: 12-40 mm.


570 CHANNELS • Installation: To an even gradient, without ponding or backfall. • Lowest points of channels: 6 mm above drainage outlets.


600 RADIUS KERBS/CHANNELS • Usage: Radii of 15 m or less.


610 ANGLE KERBS • Usage: Internal and external 90° changes of direction. • Cutting of mitres: Not permitted.


620 ACCURACY • Deviations (maximum): - Level: ± 6 mm. - Horizontal and vertical alignment: 3 mm in 3 m.


625 REGULARITY OF PAVED SURFACES • Maximum undulation of (non-tactile) paving surface: 3 mm. - Method of measurement: Under a 1 m straight edge placed anywhere on the surface (where appropriate in relation to the geometry of the surface).


• Difference in level between adjacent units (maximum): - Joints flush with the surface: Twice the joint width (with 5 mm max difference in level). - Recessed, filled joints: 2 mm. Recess depth (maximum): 5 mm. - Unfilled joints: 2 mm.


• Sudden irregularities: Not permitted.


630 NARROW MORTAR JOINTS • Jointing: Ends of units buttered with bedding mortar as laying proceeds. Joints completely filled, tightly butted and surplus mortar removed immediately. - Joint width: 3 mm.


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