used in modern days as it requires personnel to be in the trench to torque the jacks, and there is no method to accurately check the force being applied to the sheeting.

Timber shoring is a method which utilizes wooden timbers to shore the trench. This method is rarely used in modern industry due to the complexity and risk involved. Timber shoring requires cutting timbers as wide as 8x8in to length and wedging them in place. This requires personnel to enter the unprotected trench, and much like the screw jacks has no method of accurately