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Heavy-duty flood protection for wide openings

Each gate is custom-designed and manufactured in our UK facility to suit the site geometry, flood levels and operational requirements. Using a hydraulically lifted leaf and guided sliding system, the gate can be safely deployed by a single trained operative, even at significant widths and flood heights.

Our sliding flood gates are widely used on coastal defence schemes, water and wastewater treatment works, substations, highways infrastructure and other critical assets where resilience, durability and reliability are essential.

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Controlled, single-person operation

The sliding flood gate is designed to be operated safely and efficiently by one individual. Hydraulic lifting cylinders raise the gate leaf clear of the threshold, allowing it to travel smoothly on castor assemblies along the guide rail. Manual winches, housed in lockable enclosures, provide controlled movement into the open or closed position. Once closed, the gate is lowered onto the stainless steel threshold, compressing the base seal to form a watertight barrier. All operating components are securely enclosed to prevent unauthorised use.

 

Engineered to suit your site

Every sliding flood gate is designed in-house by our experienced engineering team. Gate width, height, flood protection level, wall interfaces and operating arrangements are all tailored to the specific project. We work closely with designers, contractors and asset owners to ensure seamless integration with flood walls, existing structures and finished ground levels. Options include primary and backup hydraulic systems, bespoke access arrangements and finishes to suit coastal or industrial environments.

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Built for extreme environments

Our sliding flood gates are engineered for longevity in harsh conditions. The gate leaf is fully welded, enclosing a structural steel matrix to prevent water ingress and maximise strength. All steelwork is blast-cleaned and protected with a high-performance C5 marine-grade paint system, with stainless steel used for exposed fixings, seals and threshold components. With minimal moving parts and robust detailing throughout, the system requires low routine maintenance and is always ready to perform when needed.

 

Typical applications

  • Coastal and tidal flood defence schemes

  • Water and wastewater treatment works

  • Electrical substations and utilities infrastructure​​​​​​​

  • Highways, underpasses and access roads

  • Industrial and critical facilities requiring wide clear openings

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Technical spec

  • Made from mild steel or stainless steel (304 or 316L)
  • Welding standards in line with BS EN 1090
  • Design codes:
  • BS EN 1990 Eurocode 0: Basis of Structural Design
  • BS EN 1993 – Eurocode 3: Design of Steel structures
  • Fixings designed and proved using Hilti PROFIS Anchors Software
  • Design variants include vehicular, bi-fold and pedestrian access and can be designed as cast-in or faced-fixed
  • Vehicle-access using 28mm 200x10mm 304 stainless steel threshold at an 8 degree angle
  • Pivotability to 190 degrees
  • Coated using 2 pack epoxy paint system for high resistance to corrosive atmospheres
  • PAC accessible
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DESIGN AND CONSULTATION

Defending against a flood requires a feat of engineering. Many say they can do it. Few actually can. We make bold claims about our products and back them up with a testing regime unrivalled on the market. Our products work. And we prove it. Every product we make is unique. Designed around your needs and backed by independent design calculations. We don’t design to sell. We design to defend.

Find out more

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HMRC Shipley

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HMRC Shipley

MMEngineering were commissioned to create, advise and install flood defence products for HMRC Shipley at their riverside location.

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Hessle Foreshore Tidal Defence Scheme

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Hessle Foreshore Tidal Defence Scheme

The Hessle Foreshore is a low lying area situated on the northern banks of Humber estuary. A tidal surge in 2013 flooded 40 houses and 44 businesses in the Hessle area

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Utilising Parametric Modelling in Flood Defence Design

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Utilising Parametric Modelling in Flood Defence Design

MM Engineering used parametric modelling to design precise, efficient, and bespoke flood defence solutions, improving accuracy, collaboration, and innovation.

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