GB-Edinburgh: Oban Pier Timber Replacement

The Works

Oban South Pier is situated at NLB's Oban Base in Argyll and Bute. The central section of the pier consists of a T-shape extension to the original pier added in the 1950's. This provided a front edge of approximately 49m and allowed for berthing in deeper water. This was then extended in the early 2000's to provide NLB with a larger operational surface area, extending the central section by approximately 10m and creating new eastern and western sections to the pier. All seaward faces have timber fender piles, though only the central section is currently used for berthing.

Based upon visual assessment of the timber elements, it was concluded that a number of repairs are required to bring the structure up to a satisfactory standard. The condition of the timbers is generally poorest at the lowest sections. Repairs have been recommended for the most critical elements, in terms of the importance of their function and the severity of the defects. These are detailed in Appendix A - Bill of Quantities and Appendix B - Inspection Report. This tender will cover items detailed in the report under Option A.

Works to replace rotten timbers are summarised as follows:

•Replace 9 No. full pile with like-for-like 360x360mm greenheart pile, replacing brackets, bolts, nuts and spacers as required.

•Replace 4 No. fender with heavy-duty rubber D-fender, replacing fixings as required.

•Replace stair support waling with like-for-like 360x360mm greenheart waling beam, replacing brackets, nuts and bolts as required. •Replace total 41m of lower waling with like-for-like 360x360mm greenheart waling beam, replacing splice plates, brackets, nuts and bolts as required. •Replace total 36m of lower intercostals with like-for-like 260x260mm greenheart members (in approx. 2.55m lengths), replacing fixings as required. •Replace 24m of cope beam with like-for-like greenheart members (210x210mm and 260x150mm), replacing fixings as required.

•Reinstate 16 No. failed connection, replacing nuts, bolts and spacers as required (excluding those associated with repairs listed above).

Site Visit

Potential suppliers will be required to attend a site visit this is a mandatory requirement. A site visit is planned for Oban Depot on Monday 21 June 2021 at 10.30am. On confirmation of attendance to site all potential suppliers will be required to complete and return an NLB COVID 19 Questionnaire prior to attending the site visit.

The appropriate PPE equipment and COVID-19 guidelines, restriction and social distancing must be adhered to whilst on site.

Additional information: The contracting authority considers that this contract may be suitable for economic operators that are small or medium enterprises (SMEs). However, any selection of tenderers will be based solely on the criteria set out for the procurement.