|
These instructions are for guidance of all involved in the installation of Light Dome Road Stud depressible inserts and housings.
All genuine Light Dome products conform to CE.EN1463 Parts 1 & 2 and carry identification. They are manufactured under ISO 9001 certification.
The instructions should be read in conjunction with any legislation currently in force from the D of T and Highways Agency.
All Light Dome products are approved for use on all UK roads, and are also accepted by the Department of Environment in the Republic of Ireland. Copies of approvals are available on request.
The Company accepts no responsibility for any consequences of installation not carried out in accordance with our recommendations. It is the responsibility of the installer to ensure that the road construction and weather conditions are suitable for the installation of depressible road studs.
POSITIONING AND SPACING of Light Dome depressible inserts
The spacing and reflected colours of the inserts in Great Britain must be in accordance with Department for Transport regulations, and in the Republic of Ireland, with the Department of Environment regulations in force at the time.
Road stud housings must not be installed within 50mm of any expansion joint.
For overseas usage, Light Dome metal & plastic road stud housings and pads should be positioned and spaced to conform with the existing laws and regulations, where applicable, of that country.
INSTALLATION of ROAD STUD
- Hydraulic powered drilling equipment is the only approved method of installation the road stud on public roads in the UK.
- The drilling equipment unit consists of 152mm diameter head, which will drill out to a depth of 38mm.
- On reaching this depth the drill is raised, moved forward 130mm and a second hole drilled out.
- The drill is then traversed between the two holes and the resulting cavity will be to the required tolerances.
INSTALLATION HEIGHTS
- For Light Dome depressible Road Studs to give optimum reflective visibility, it is essential that the reflectors be continually above road level, so as to receive and reflect the light of vehicle headlamps.
- A sunken Road Stud unit will not reflect and the life of both the insert and reflectors will be reduced.
- Correct use of a height gauge, which is available from Light Dome if required, will ensure maximum efficiency from the Road Studs.
- The Light Dome metal & plastic road stud housing must be installed so that, with the height gauge resting on the flanges, the ends of the gauge must not be more than 3mm clear of the road surface.
METHODOLOGY
- The 'frogs' on the underside of the Light Dome metal housing must be pre-filled with a filled bitumen* poured in hot, to within 3mm of the top of the 'frog' recess, and then allowed to cool.
- Due to the patented design, the NEW Light Dome plastic housing can be placed in the road cavity WITHOUT the need to 'frog'
- The drilled-out road material and dust must be completely removed from the cavity.
- In cold or wet weather conditions, the cavity should be heated by flame gun to raise the temperature to a minimum of 5°C before bedding and grouting the road stud Housing.
- Bitumen, at the required temperature of between 190-200oC, and fully agitated, is then poured into the cavity to a depth of approximately 6mm.
- Immediately place the road stud housing onto the molten bitumen. The cavity sides between the road stud housing and the road are topped up with the molten bitumen to the level of the road surface.
- After a few minutes, check the following: The bitumen is level with the road surface; The road stud unit is level and aligned in the cavity; The overall height (with the aid of a height gauge); No surplus bitumen has blocked the recess to the Light Dome reflector lenses or eyes.
- Once the bitumen has cooled, traffic can be resumed over the depressible Light Dome Road Stud.
*We recommend using a Road Stud Grouting Compound developed for this purpose
REMOVING AND REPLACING OF INSERTS
Removal
- Insert a suitable tool between the rubber insert and housing of the Road Stud.
- Lever the rubber insert off the retaining pins.
- Check the housing for damage, and ensure that the four retaining pins are intact.
- Clean the inside of the housing of any dirt which can cause excessive wear on the rubber insert. Ensure that the inside walls, base of the housing and the retaining pins are completely clean. Remove any bitumen or other debris located on the housing in front of the rubber insert reflector position.
Replacing
- Insert one side of the rubber insert into the housing of the Road Stud and ensure the pins are located into the two rubber insert holes.
- Push the rubber insert under pressure so that the other two location pins can be inserted. The rubber insert will spring back so that the locating pins hold it firmly.
- Ensure that the rubber insert is properly located in the housing of the Road Stud; pressure by the heel will assist in this operation.
WE DO NOT RECOMMEND THE RE-INSTALLATION OF HOUSINGS
Issue 7 August 2007
Light Dome Road Products (A division of Industrial Rubber plc)
4 Fielder Drive Newgate lane Industrial Estate FAREHAM
Hampshire PO14 1JE
Tel: +44(0)1329-284780 Fax: +44(0)1329-829485
Email: sales@lightdome.co.uk
Manufacturers of the depressible Road Stud and Plastic Housing
In partnership with our Sister Companies in China to achieve Low Cost Manufacturing Abroad |
