Waler frames provide 2-way support to trenches and are used in conjunction with trench sheeting.
Each unit comprises 2 No. aluminium or steel rails strutted apart by two hydraulic cylinders. The latter are available in a range of different sizes depending on the trench width.
This sequence explains the method for installing a Hydraulic Waler System, complete with optional End Bearers within a trench.
Timestamps:
00:00 - Introduction
00:08 - Assembling the Hydraulic Waler Frame
01:11 - Trench Preparation & Lower Frame Installation
02:01 - Upper Frame, Sheeting & Pressurising
02:50 - Progressive Excavation & Frame Adjustment
03:27 - Backfilling, Removal & Reinstatement
