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Caisson Units

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    Tunnels and Shafts

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Stuart Carson
Great Britain - National Tunnelling Manager
  • scarson@fpmccann.co.uk
  • +44(0)1455 299758
FP McCann manufactures a range of reinforcing units suitable for sinking by the caisson method. Caisson shaft units can be supplied with diameters of 2100mm up to 4000mm.

Caissons are manufactured within the scope of the ISO9001 accredited Quality Management System and in accordance with BS EN 1917 and BS5911-3, where appropriate^. However, 3600mm and 4000mm diameters remain operative within the scope of the ISO9001 accredited Quality Management System.

Open caisson-sinking techniques permit a shaft structure to be progressively sunk, either under its own weight or with the aid of caisson jacks. This is done in a controlled manner from the surface to a predetermined depth. Caisson shafts are constructed using a metal cutter ring and a base section with rings being added on top as excavation proceeds. The technique is suited to shaft construction through weak soils, high-plasticity clays, silts, sands and gravels, particularly below the water table.

^ Caisson manholes cannot be CE marked as their diameters are not covered by the scope of the harmonised European Standard BS EN 1917. However, 2100mm – 3000mm manholes are kite-marked against the scope of the complementary British Standard BS5911-3.

FP McCann Caisson Range

FP McCanns precast concrete caisson shaft range

*DN4000 supplied as a two-piece unit.
Caisson Rings – Table of Weights (DN 2100 – 4000)
FP McCann Caisson Shaft rings table of weights DN2100 - DN4000
*DN4000 supplies as a two-piece unit.
**Nominal weights increase by 5% for sizing lifting equipment and reduce by 5% for floatation design.
Base units may be fitted with a light-duty (10mm) or a medium-duty (20mm) cutting shoe.
Contact us
  • Head Office
    3 Drumard Road
    Knockloughrim
    Magherafelt
    BT45 8QA

  • 028 7964 2558
  • sales@fpmccann.co.uk
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Contact us
  • Head Office
    3 Drumard Road
    Knockloughrim
    Magherafelt
    BT45 8QA

  • 028 7964 2558
  • sales@fpmccann.co.uk
Find us

© FP McCann Ltd.