Q10 / KERBS/EDGINGS/CHANNELS/PAVING ACCESSORIES

SPECIFICATION FOR

KERBS/EDGINGS/CHANNELS/PAVING ACCESSORIES

SECTION Q10

Revision / Date / Issue Authorised By
Approved for Issue
Date

To be read with Preliminaries/ General conditions.

TYPES OF KERBS, EDGINGS AND CHANNELS

112PRECAST CONCRETE KERBS

Standard: To BS EN 1340.

Designations: HB2

Size (width x height x length): 125mm x 255mm x 914mm

Special shapes: n/a

Finish: as cast

Colour: grey

Bending strength: 4.0

Weathering resistance: Class 3

Abrasion resistance: Class 1

Slip / skid resistance: n/a

Bedding: concrete grade ST4

Joints generally: open, 2-3 mm gap

Sealant movement joints: n/a

113 PRECAST CONCRETE KERBS

Standard: To BS EN 1340

Designations: BN

Size (width x height x length): 150mm x 125mm x 914mm

Finish: as cast

Colour: grey

Bending strength: 4.0

Weathering resistance: Class 3

Abrasion resistance: Class 1

Slip / skid resistance: n/a

Bedding: concrete grade ST4

Joints generally: open, 2-3 mm gap

Sealant movement joints: n/a

114PRECAST CONCRETE KERBS

Standard: To BS EN 1340

Designations: EF

Size (width x height x length) 50mm x 150mm x 914mm

Finish: as cast

Colour: grey

Bending strength: 4.0

Weathering resistance: Class 3

Abrasion resistance: Class 1

Slip / skid resistance: n/a

Bedding: concrete grade ST4

Joints generally: open, 2-3 mm gap

Sealant movement joints: n/a

180DRAINAGE CHANNEL SYSTEMS WITH GRATINGS TO PAVED AREAS

Manufacturer: ACO or similar approved

-Product reference: N100K

Size: 130 mm

Type of fall: laid to falls

Finish: as cast

Colour: grey

Accessories: sump units

Bedding: concrete grade ST4

Joints generally: manufacturer’s specification

Cover gratings: galvanised steel

-Fixings: mechanical

-Loading grade to BS EN 124: pedestrian

-Finish/ Colour: galvanised

ROADS/ PAVING ACCESSORIES/ MARKING

395ROAD MARKING (THERMOPLASTIC)

Standard: Road Safety Markings Association standard specification document for road marking and road studs (StanSpec).

Manufacturer: Contractor’s choice

- Product reference: n/a

Colour: white

Retroreflectivity to BS EN 1436: Class R2

396 ROAD MARKINGS (THERMOPLASTIC)

Standard: Road Safety Association standard specification document for road markings and

road studs (StanSpec)

Manufacturer: Contractor’s choice

- Product reference: n/a

Colour: yellow

Retroreflectivity to BS EN 1436: n/a

LAYING

510 ALAYING KERBS, EDGINGS AND CHANNELS

Cutting: Neat, accurate and without spalling using a masonry saw where necessary. Form neat junctions.

-Length of cut kerb, channel or edging: Not less than 450mm.

-Length of cut bricks and blocks: Not less than one third of their original length.

Bedding of units: Positioned true to line and levelled along top and front faces, in a mortar bed on accurately cast foundations or on a race of fresh concrete.

Securing of units: After bedding has set, secured with a continuous haunching of concrete or on a race of fresh concrete with backing concrete cast monolithically.

Exposed faces of units: Keep clean and free from concrete and mortar droppings.

520ADVERSE WEATHER

Conditions: Do not construct if the temperature is below 3°C on a falling thermometer or 1°C on a rising thermometer. Adequately protect foundations, bedding and haunching against frost and rapid drying by sun and wind.

530 ACONCRETE FOR FOUNDATIONS, RACES AND HAUNCHING

Standards: To BS 8500-2.

Standard Mix: ST4 or better.

Workability: Very low

540CEMENT MORTAR BEDDING

General: To section Z21.

Mix (Portland cement:sand): 1:3.

-Portland cement: Class CEM l 42.5 to BS EN 197-1.

-Sand: To BS EN 12620, grade 0/4 or 0/2 (MP).

Bed thickness: 12–40mm

547BEDDING/ BACKING OF UNITS ON FRESH CONCRETE RACES

Standard: To BS 7533-6.

570CHANNELS

Installation: To an even gradient, without ponding or backfall.

Lowest points of channels: 6mm above drainage outlets.

580DRAINAGE CHANNEL SYSTEMS

Installation: To an even gradient, without ponding or backfall. Commence laying from outlets.

Silt and debris: Removed from entire system immediately before handover.

Washings and detritus: Safely disposed without discharging into sewers or watercourses.

590DRAINAGE CHANNEL SYSTEMS WITH BUILT IN FALL

Installation: Top of channels level, installed in correct sequence to form an even gradient without ponding or backfall. Commence laying from outlets.

Silt and debris: Removed from entire system immediately before handover.

Washings and detritus: Safely disposed without discharging into sewers or watercourses.

600RADIUS KERBS/ CHANNELS

Usage: Radii of 15m or less.

610ANGLE KERBS

Usage: Internal and external 90° changes of direction.

Cutting of mitres: Not permitted.

615 BTAPER KERBS

Usage: Where kerb face reduces to dropped kerbs.

620ACCURACY

Deviations (maximum):

-Level:  6mm.

-Horizontal and vertical alignment: 3mm in 3m.

630NARROW 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: 3mm.

631 BDRY BUTT JOINTS

Tightly butt kerbs together.

-Joint width: 2mm.

640TOOLED MORTAR JOINTS

Jointing: Ends of units buttered with bedding mortar as laying proceeds. Joints completely filled and tooled to a neat flush profile.

-Joint width: 6mm.

Author HE / BETTWS SCHOOL, NEWPORT / SC00940
09/07 / Rev
clarkebond / Page 1 of 4