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SECTION B - Derry City Council

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APPENDIX 5/2:<br />

SERVICE DUCT REQUIREMENTS<br />

1 Details of the typical duct construction are shown on Drawing No. I2, MCDHW, Volume 3, “Highway<br />

Construction Details”. Details for duct chamber as show on Contract drawings Drawing No.<br />

073030/GA/25.<br />

2 The location, size and type of the service ducts are detailed on the Contract Drawings.<br />

3 Bedding material should be Quarry dust in footways; In-situ concrete mix ST2 (Class E) in<br />

carriageway crossings.<br />

4 Backfilling of Service Ducts in proposed carriageway and footway, shall be Type 3 Clause 850NI<br />

from duct surround to formation level. Service Ducts in existing carriageway backfill shall be<br />

Concrete ST2 from duct surround to basecourse level; In-situ concrete mix ST2 (Class E) in<br />

carriageway crossings<br />

5. Colour coding of ducts is to be in accordance with Health and Safety Executive booklet HS(G)47<br />

6. Location of the existing public services, based on Statutory Bodies record information, is shown on<br />

the Services drawings<br />

194

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