Frequently Asked Questions About Waler Shoring Systems
Also known as horizontal walers, hydraulic waler systems or hydraulic waler frames, these heavy-duty two-sided systems use hydraulic cylinders between waler rails to brace trench walls. Choose waler rail lengths of 8, 12 or 16 feet in two-cylinder or three-cylinder configurations, with working ranges from 17 to 27 inches up to 52 to 88 inches. System weights run from 207 to 466 pounds. Every waler shoring rental offers a modular design with wide, adjustable cylinder spacing and quick aboveground installation and removal. Contractors rent our waler system shoring for underground utility and pipe repair work, microtunneling pits and highway and bridge projects. Complete your setup with hydraulic shoring accessories such as pumps and release tools.
Learn more about waler shoring systems in our FAQ section below.
Under OSHA standard 1926.652(c)(1), aluminum hydraulic shoring designs must follow the manufacturer’s tabulated data or, when that data can’t be used, OSHA’s Appendix D. Support system members must also be securely connected to prevent sliding, falling or kickouts, per 1926.652(e)(1)(i). Confirm the requirements for your jobsite with OSHA and your state plan.
Waler strut spacing comes from the manufacturer's tabulated data rather than a jobsite calculation. Under OSHA standard 1926.652(c)(2), your layout must follow the manufacturer’s specifications, recommendations and limitations, and any deviation requires the manufacturer’s written approval. Allowable spacing typically varies with soil type, trench depth and trench width. Contact our trench safety experts for further guidance.
Horizontal waler shores run along the trench walls and press against sheeting, and their wide cylinder spacing leaves more open room for pipe and equipment. Vertical shores use upright rails at set intervals and generally suit shorter runs in more stable soil. The right system depends on your soil conditions, trench length and the manufacturer's tabulated data.