INSTALLATION GUIDE
INSTALLATION DESIGN: RADII, CROSSINGS, JUNCTIONS AND BENDS Main Carriageway Class 1 mortar Main Carriageway
Concrete/reinforcement to suit anticipated trafficking 12.5mm galvanised steel plate
Concrete/reinforce suit anticipated tra 12.5mm galvanise
RADII
CROSSINGS
HIGHWAY RADII GAP WIDTHS
Class 1 mortar
ST4 Concrete
Highway/Mini Highway To form external radii of 25 metres or less (minimum 6 m), special radius units should be used (see table, right). As these do not cover all individual radius dimensions, some slight gaps are required between units as indicated in Highway radii gap widths table, right
Highway/Mini Highway Use crossing base units to carry drainage runs under side roads/ vehicular crossing points (see Fig 1) Grid units available (see Fig 6) Safeticurb ® (DBK unit only) To continue linear drainage at road junctions, kerb crossing points (pedestrian/vehicular), use transition units to reduce kerb height to road level. These connect with standard grid or slot units as necessary JUNCTIONS/SHARP BENDS Radius Kerb Clearway/Safeticurb ® Use silt box top at outlets or with suitable uPVC pipe fittings (cut to fit) to form junctions or sharp bends (see figs 15a and 15b - page 149.)
Top and base gap
Radius (m) Radius unit reference
125min
6
7/6
2
ST4 Concrete
7.5
10/8
3
Main Carriageway
Crossing Base Units and Cover Plates
9
10.8
2
10.5 125min
25/11
4
12
25/11 Main Carriageway
1
For external radii greater than 25 metres, lay straight units with open joints
Crossing Base Units and C
15
25/11
2
Standard Top and Base Unit
Side road
To form internal radii (minimum 6m internal radius) use internal radius units
20
25/11
5
25
25/11
7
Standard Top and Bas
Clearway/Safeticurb ® Where necessary, standard (straight) units may be laid to form radii or bends
Side road
Radius Kerb
26
Straight
7
Safeticurb ® units: alignment ring within bore acts as a former for infill mortars
Main Carriageway
Main Carriageway
Concrete/reinforcement to suit anticipated trafficking 12.5mm galvanised steel plate
Concrete/reinforcement to suit anticipated trafficking 12.5mm galvanised steel plate
Class 1 mortar
Class 1 mortar
Fig 2. Highway – typical kerb crossing
125x150 BN kerb & surround
ST4 Concrete
125x150 BN kerb & surround
Pavement detail
ST4 Concrete
Pavement detail
Class 1 mortar Thickness varies to suit crossing kerb
125min
12.5mm galvanised steel plate
Class 1 mortar Thickness varies to suit crossing kerb
125min Fig 1. Highway crossing – base unit
12.5mm galvanised steel plate
Main Carriageway
Crossing Base Units and Cover Plates
Main Carriageway
Crossing Base Units and Cover Plates
Standard Top and Base Unit
ST4 concrete bed & haunch
ST4 concrete bed & haunch
Side road
Radius Kerb
Standard Top and Base Unit
Side road
Radius Kerb
125
125
Fig 3. Highway – typical side road (plan view)
Silt Box Top Fig 4. Highway – vehicular cr ssing
Silt Box Top
146
5mm TECHNICAL INFORMATION: charcon.technical@aggregate.com Channel Grating Surfacing
5mm 50mm
Channel Grating Surfacing
50mm
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