The main components of this type of shoring system are vertical steel wide flange beams known as soldier piles and horizontal timber lagging. The soldier piles can either be placed in drilled holes or installed by driving the beams into the ground. The soil must have sufficient cohesion and stability to retain a vertical face until the lagging can be installed between the soldier piles.
Shoring is normally braced using tiebacks, rakers or struts. These supports can be preloaded to minimize potential movements of the shoring system.
The Anchor Group are experienced in the design and installation of this type of earth retention system. Examples of projects with lagging which were completed by our firm are TTC Yonge Station, Metro Toronto Convention Centre, Portage and Main Winnipeg Manitoba and The Air Canada Centre. Several of these are described in detail in the Projects section.