Specifications for dropped kerbs

General
  • Works shall be constructed using only the approved materials to the dimensions and position approved and marked by Hampshire Highways
  • Standard detail drawings have been produced which show the typical construction requirements for a typical vehicle crossing in an existing footway as well as a crossing for a commercial or industrial area
  • These drawings are accompanied by a set of guidance notes which provide additional guidance to engineers regarding the use of the details and the various options available
  • Where existing construction differs in anyway from the standard drawing and materials in this specification the contractor shall consult Hampshire Highways before commencing any works to agree details
  • Any changes to the design shall be agreed with Hampshire Highways
  • Gradients shall not exceed 1 in 12, in general, to ensure the safety of pedestrians
  • The design shall, where space permits, maximise the area of "flat" footway to the rear of the footway to assist the mobility impaired
  • All covers shall be adjusted as necessary to meet finished levels and be of suitable quality to withstand vehicle loading – works normally carried out by the appropriate utility
  • No work shall proceed unless all approvals have been given, this includes approval from third parties where the applicant is not the owner of the property, vehicle crossing approval, any planning permission (classified roads etc), obtaining of a road opening license and the compliance with all conditions and items therein
  • Whilst works are under construction the contractor shall ensure that temporary signing is provided in accordance with Chapter 8 of the Road Traffic Signs Manual and the appropriate Codes of Practice
  • The specification referred to is the "Specification for Highway Works" published by the H M Stationery Office with the latest amendment
Workmanship
  • The new access shall tie in with the existing footway surfacing materials and levels. Prior to excavation all edges shall be saw cut to prevent damage to surrounding surfaces. Vertical faces to be painted with bitumen when reinstated
  • Excavation shall be carried out to the required depth to achieve the specified construction thickness. Additional excavation will be required in soft ground. All excavated material shall be properly disposed of or recycled off site
  • The contractor shall ensure all utility plant is identified and properly protected, with slip trenches dug as necessary. If additional protection is required the relevant utility shall be notified by the contractor
  • Existing kerbs shall be carefully removed including existing bedding and backing minimising damage to the existing carriageway
  • Kerbs shall be laid to a smooth line and level with a 20mm upstand at the carriageway edge
Materials
  • Sub base to be 150mm thick complying with Clause 803, 806 or 816
  • Binder course to be 45mm thick open graded macadam, 20mm nominal size (Clause 6.1 of BS 4987-1)
  • Surface course to be 20mm thick medium graded macadam, 6mm nominal size (Clause 7.6 of BS 4987-1)
  • Precast concrete kerbs shall be 250 x 125mm tapers and 150 x 125mm bull nosed to BS 7263 Pt 1 on 275 x 150mm grade ST1 concrete bed and with 150 x 100 mm and 150 x 200mm backing respectively
  • Precast concrete edgings shall be 150 x 50 type EF to BS 7263 Pt1
  • Concrete grade ST1 shall be used as protection to public utilities