New stud hits the road
Page 17
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reflecting stud for delineating carriageways is to be marked by rismo Universal Ltd, part of the Redland group.
Based at Crawley in West Suspc, the company claims that its oadstud, which is in diecast uminimum alloy, is resistant to ie effects of salt and grit.
The design of the aluminimum iroud protects the multiple )nses from damage, while ilowing them to be cleaned by assing traffic.
The Roadstud is installed in ither concrete or bitumen surices by drilling a 32mm (11/4in) iarneter hole and bedding the tud in a bitumen grout.
For removal of the stud during md resurfacing, grooves are inorporated in the main casting to which a special tool is inerted to lever the stud out. The Department of Transport has approved the Roadstud as an edge of carriageway delineator on motorways and for general use on all roads where traffic does not exceed 10,000 vehicles per day for single carriageway, and 20,000 per day on dual-carriageway roads.
Prismo claims that its Roadstud is considerably cheaper than the famous Catseye type of reflecting stud both on first cost and installation cost.
The company's marketing manager Rex Perkins quotes £1.65 and £1 for first-cost and installation cost of the Prism°, against £2.50 and £2.50/£3 for the Catseye.