Excavation bracing: crosslot struts vs tiebacks and rakers

One-line orientation

A shoring wall needs bracing against earth pressure. Crosslot struts and rakers occupy the excavation; tiebacks extend into the soil behind the wall and keep the excavation more open.

Key points

• Bracing supports the shoring wall against lateral earth (and water) pressure; it is not the wall itself.
• Crosslot bracing: horizontal struts span across the excavation, propping opposite shoring walls against each other. Effective, but the struts occupy the open cut.
• Tiebacks: anchors drilled into soil/rock behind the wall and tensioned to hold the wall back. They keep the excavation clear of internal obstructions.
• Rakers: inclined supports set against the shoring panels from inside the cut, bracing the wall diagonally down to a base/footing.
• Selection logic: crosslot suits narrower cuts where spanning is practical; tiebacks suit wide or busy excavations where a clear work area matters (no struts in the way).

Confusions / comparison

	Crosslot struts	Tiebacks	Rakers
Where it acts	Spans across the cut	Behind the wall (into soil/rock)	Diagonal, inside the cut
Load goes to	Opposite shoring wall	Tensioned soil/rock anchors	Interior footing/base
Excavation clear?	No — struts obstruct	Yes — open work area	Partly — diagonals inside
Good when	Narrower cuts	Wide / busy sites	When neither full-span nor anchors suit

Related

→ Shoring systems (this module): the walls being braced · Angle of repose (this module): why shoring + bracing is needed instead of a laid-back slope · Underpinning (this module): protecting adjacent foundations during deep excavation.