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SPECIFICATION FOR THE REINSTATEMENT OF OPENINGS IN ROADS
Appendix A12
Reinstatement of Modular Surface Layer
A12.1 Interim Reinstatement
Where an interim reinstatement is required, the existing modules should be reused, including the use of broken modules. Where damage has resulted in fragmentation or widespread breakage of modules, then bituminous material may be used for interim reinstatement, provided they meet the performance requirements of Section S2 and that compaction of such material does not result in further damage to adjacent modules.
A12.2 Permanent Reinstatement
1) Permanent reinstatement of modular surface layers should be generally carried out in accordance with BS 7533.
2) Permanent reinstatement of modules shall include all modules which are situated within or extend beyond the effective width of the excavation (W) described in S2.1.4 and shall also include any other modules which are disturbed in the course of carrying out the excavation.
3) Clean undamaged modules shall be re-used for permanent reinstatement; broken modules shall not be used for permanent reinstatement and shall be replaced.
4) Bedding material shall be sand or mortar, to match the characteristics of the existing type and thickness. Sand, mortar or other grouting, to match the performance of the existing, shall be applied to gaps between individual modules at the time of permanent reinstatement.
A12.3 Provision of Replacement Modules
1) Where insufficient modules remain for reinstatement use and identical replacement modules are no longer available, then a reasonably similar colour, shape and size shall be the preferred order of criteria in the choice of acceptable replacements.
2) Where replacement modules are required due to breakage at some time prior to the Undertaker's works, the Authority may provide suitable replacements to the Undertaker, free of charge.
3) Where replacements modules are required due to breakages caused during the course of the Undertaker's works, the Undertaker shall reinstate using modules purchased at the Undertaker's expense or purchased from the Authority at reasonable cost.
4) Authorities are recommended to retain stocks of modules used within their areas to enable them to provide replacements when required. Where no stocks of suitable replacements are available, Authorities should assist Undertakers in locating a source of suitable replacement modules.
A12.4 `Pre-existing Surface Damage Outside Limits of Undertaker's Works
1) Some modular surfaces outside of the limits of the Undertaker's works may be broken or have settled or deformed. Where the existing profiles are near or exceed the current intervention and construction tolerances specified in S2, it will be difficult for the Undertaker to construct a complying reinstatement. Subject to the Authority agreeing to meet the costs of the works necessary to reinstate the surfaces outside the limits of its works, the Undertaker shall extend its reinstatement works to include such surfaces. In the absence of agreement, the Undertaker shall be under no obligation whatsoever to extend its reinstatement works but shall use its best endeavours to ensure that the interface between its reinstatement and the adjoining surfaces avoid creating hazardous trips. In such situations, it must be recognised that it may be necessary to install different sized modules or fillets to minimise surface irregularities at the interfaces. The Undertaker shall use its best endeavours to match existing materials and profiles and meet the tolerances specified in S2.
2) Where the area of permanent reinstatement needs to be substantially extended, to include an existing area of broken or settled modular surfacing, the Undertaker shall notify the Authority prior to the commencement of works.
A12.5 Joint Inspections and Recovery of Costs
1) Within Limits of Undertaker's Works - Following notification from the Undertaker, a joint inspection shall be arranged prior to the commencement of all standard or major works to agree the extent of damaged, settled or deformed surfacing within the limits of the works. Where the Authority does not provide suitable replacements to the Undertaker in accordance with paragraph A12.3 2) above, it may contribute to the Undertaker the sum notified by the Undertaker as the cost of replacing the same.
2) Outside Limits of Undertaker's Works - Following notification from the Undertaker, a joint inspection shall be arranged to agree the need and extent of any remedial measures outside of the limits of the Undertaker's works. An apportionment of the additional costs, based on the relative areas of permanent reinstatement, shall be agreed. In the event of an Authority failing to agree to meet a proportion of the costs of reinstating modules, the Undertaker shall proceed in accordance with paragraph A12.4 1).
3) Prior joint inspections will usually be impractical for minor, emergency and urgent works. However, such works are usually small individual excavations and a proportion of such works will be inspected by the Authority, within the sample inspection regime. On completion of all minor, emergency and urgent works, the Undertaker shall be free, at its discretion subject to paragraphs A12.3 2) and A12.4 1), to recover all reasonable costs from the Authority, according to the procedure illustrated in Figure A12.1.
Figure A12.1 - Procedure for Pre-existing Damage to Modular Surfaces
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