INSTALLATION GUIDE
SITEWORK
GENERAL PRINCIPLES Plan for laying to start from an outfall at the lowest point of the system. This ensures self-draining if wet weather occurs during installation. Use level pins and string lines to ensure correct level and alignment. Clearway/Safeticurb ® The surface of these systems’ drainage units should be 3-6mm below the level of the surrounding pavement surface. After completing base foundations, lay units onto a Class 1 mortar (1:3 cement: sand) bed, adjusting to line and level using a pavior’s maul. Leave 1mm gap between units to allow for thermal expansion. If a watertight joint is required, a gun- applied sealant may be applied to the end of each unit. Clearway grid units Grid fixing bolts should be tightened to a torque of 20Nm after installation and whenever grids have been removed for maintenance. Safeticurb ® DBA and DBM slot units Protect slots from stones during construction. Slot units without iron inserts can be damaged when stones are impacted by vehicle traffic.
Use Class 1 mortar (1:3 cement:sand) to fill joints between top and base units (see Fig 5a, page 147). The joint reduces from 20mm outside to 15mm inside the unit to ensure complete filling and compaction inside the bore and to avoid cavitation from the water flow. While laying, the vertical joints between top and bases are unlikely to be maintained over the full length of the run because of minor manufacturing and jointing tolerances. A full top unit cut to suit may be required to complete the run. Use the specially designed lifting tool to place top units in position, ensuring that the inlet holes at the ends of each unit are correctly aligned. Adjust using a pavior’s maul. Remove excess mortar from inside bore as each unit is laid. Seal the pipe bore at each end of the run, either by extending the base and haunch concrete (of the Highway units or any adjacent kerbline), or with engineering bricks surrounded with concrete. HANDLING EQUIPMENT Suitable handling and lifting equipment should be used when installing concrete products.
Safeticurb ® DBG grid units Grid fixing bolts should be tightened a minimum of 5 turns after clamping plate has made contact with the soffit of the bore. Highway/Mini Highway Specially designed lifting tools available to enable units to be placed accurately in position. Lay units onto a fresh concrete base (see installation design, page 147-150), adjusting to line and level using a pavior’s maul. Apply gun-applied sealant to the ends of the base outlet unit prior to laying. Apply gun-applied sealant to the sealant recess in the end of the first standard base unit – lay the unit against the base outlet unit with the sealant recess away from the outlet. Lay subsequent base units, applying sealant to the sealant recess in each, preferably before laying each unit in position. When a crossfall is required across the top of Highway units, the base units should be laid to this crossfall. Do NOT rely on varying the thickness of mortar in the joints between top and base units.
153
TECHNICAL INFORMATION: charcon.technical@aggregate.com
Made with FlippingBook - professional solution for displaying marketing and sales documents online