The Double Acting Manhole Brace from Altrad Generation is a hydraulic shoring system for excavations where ground conditions or cross-services make a standard manhole box unsuitable. The hydraulic manhole brace uses a double-acting adjustment system, extending or retracting the frames under no or low loading, for example when the brace is first installed or as the excavation is backfilled.
Once the brace is sustaining significant ground loads, hydraulic extension or retraction is not advisable, ensuring the system holds its position securely during the operational phase. Double acting manhole brace hire is the right specification where soil conditions prevent a standard manhole box from being positioned correctly, or where cross-services obstruct the installation.
As a manhole shoring system, the double-acting design creates a safe working environment for manhole inspection work, new-build chamber construction, and utility installation at depth.
Key Features and Benefits
Hydraulic double-acting system for controlled extension and retraction under low load
Designed for excavations where a standard manhole box is not suitable
Safe working environment for manhole inspection and new-build chamber construction
Extends and retracts safely under no or low load conditions for operative safety during setup and removal
Suitable for use in excavations with cross-services preventing box installation
Available for hire and sale from Altrad Generation across the UK
Frequently Asked Questions
Q: What is a double acting manhole brace used for?
A: The Double Acting Manhole Brace provides lateral support in excavations where a manhole box is unsuitable due to soil conditions or cross-services. The hydraulic system extends and retracts safely at low load, creating a secure working area during the operational phase.
Q: When is a manhole brace used instead of a manhole box?
A: A manhole brace is specified when soil conditions do not allow for a manhole box to be installed safely, or when cross-services in the scheme prevent correct box positioning. Your temporary works engineer will advise on the right system for your site.
Q: What does double acting mean?
A: Double acting refers to the hydraulic system's ability to both extend and retract the brace frames under controlled low-load conditions, allowing safe setup at the start of the job and controlled removal after backfilling.
Q: Are double acting manhole braces available for hire?
A: Yes. The Double Acting Manhole Brace is available for hire and sale from Altrad Generation branches across the UK and Ireland. Contact your nearest branch for availability and pricing.
Q: What accessories are available?
A: Hydraulic Installation Kits are available for operating hydraulic shoring equipment, including the double acting manhole brace. Contact your nearest Altrad Generation branch for a full accessories list.
Get in Touch with Us
Contact your nearest Altrad Generation branch for expert advice on hydraulic manhole brace hire and sale. Speak to your local team today.
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