Westminster City Council King Street Low Carbon Trial

METHODOLOGY

PPM works are designed to improve the condition of the council’s asset and prolong its lifespan. In general, the footway works will involve the replacement of the paving with the same type of material, for example ASP. The condition of the whole network is assessed annually, with the worst performing streets identified. An agreed programme is then produced according to the budget, with the schemes designed showing the extents of the footway to be replaced and any other associated works. The site team then take possession of the site, fence off the area and sign the site to Chapter 8 of the Safety at Street Works and Road Works Code of Practice. The Welfare Unit for the operatives is located near to the works area and is powered by a diesel generator. Materials are usually delivered to site by a diesel grab lorry if it is an FM Conway product such as concrete. Items such as paving slabs are usually delivered from Marshalls’ depot in Sittingbourne, Kent on a diesel low loader with a mechanical offload and there may be several deliveries within the duration of a scheme. Travel to site can vary depending upon location and activities undertaken. The supervisor will travel to numerous sites during the day in a diesel panel van and usually at least one member of the team will drive to site in a 3.5t diesel lorry. The excavator driver will normally travel to site on a 3.5t diesel lorry with a trailer for the excavator.

When not in use on the site the excavator will be re-mobilised on other sites until required again.

PPM STANDARD WORKS METHOD – MARLBOROUGH HILL

The standard method for relaying the footway is to:

1. Take up and relay the kerb line, replacing defective kerbs where necessary using a 1.5t diesel excavator

2. Take up the existing paving materials with the excavator

3. Excavate the sub-base to the required level using the excavator

4. Level the sub-base by hand

5. Install the sub-base concrete, use a diesel wacker plate to level

6. Prepare the paving area by hand

7. Lay the sand and cement paving bed (masonry work)

8. Lay the paving slabs, with any cuts carried out with a petrol disc cutting saw (masonry work)

9. Hand point joints with a sand and cement mix

10. Reinstate the kerb line to match the existing asphalt

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