Defence (Floodgates) Doors Ltd - Defence Flood Gates, Resistant Blast Doors, Floodgates

Floodgates | Blast Doors | Cell Doors | Prison Doors | Stop Logs

Defence Doors Ltd are a Steel Fabrication company based in Yorkshire with over 20 years experience in the manufacture of Defence Doors, Stop Logs and much more. Offering Floodgates and a unique manufacture, design, Installation and Consultancy service for the construction industry throughout the UK and overseas.

For details on Defence Doors Ltd current and recent manufacturing door contracts with monthly news updates please Click Here. Both climate change and global terrorism have been two major factors over the past 10 years that required new specialist door design and development work to take place.

Defence Doors Ltd has standard steel Floodgates that have been approved and used for Environment Agencies and local authority alleviations schemes throughout the UK.

With rising sea levels, Floodgates are now being designed into the new sea defences all along the UK coast line incorporating a range of watertight steel Flood Gates and storm gates. These gates are built directly into new concrete wave walls or manufactured as a free standing structure between existing walls. Heavy seas and transported debris impose structural loading on the floodgates in storm conditions, these gates are designed to withstand these impact loads whilst protecting coastal towns from tidal surges.

Adverse weather conditions and extreme rain fall is now common place creating regular flash flooding across the country. We have a range of steel Floodgates designed specifically for the river defences currently being designed built by the Environment Agency. These steel structures do have a visual impact on the surrounding areas but design considerations are given to minimize this impact. We offer a range of alternative finishes to the gate surface with various options of timber cladding, stainless steel engravings or architectural sculptures mounted on the gates leaf to reduce this impact by making the gate a focal point.

Terrorism is almost an every day occurrence and a very real threat, we offer standard and bespoke designs for blast door applications. Blast Doors are designed for personnel protection, explosives storage, munitions manufacture and development, terrorist bomb, accidental explosions and explosive containment covering military installations, petro-chemical sites and more frequently and civilian & government buildings, the  construction of Blast Doors varies depending on the design requirements and the doors application and a full set of bespoke independent design calculations are supplied with every door type.

Light composite doors manufactured for buildings occupied and regularly used by personnel in control rooms, government building and can also be used as Cell Doors for holding rooms. These doors are lined with acoustic thermal cores and generally these are fitted with security hardware and emergency exit devices. The hardware has to be substantial enough to resist a blast load and yet remain functional, and is generally supplied with one of the Surelock McGill multi point security products and supplied in a primer or epoxy paint system.

Heavy composite double skinned heavy plate assemblies with internal structural members or concrete cores. Door type is for hardened buildings, explosive stores, military installations and can also be used as high security Prison Doors..

These doors are generally manually operated with options of rack and pinion or multi point latching centre hand wheel operation. Options are available for automating these doors using hydraulic, pneumatics or electrics depending on the door application and design brief. These heavy composite constructions may weigh several tones but are still operable by a single person and available in a primed or epoxy paint finish.

Heavy plate single skinned assemblies generally operated as the heavy composite doors but the option here is for a single skin to prevent penetration of exploded fragments. The door plate limitations are the commercial availability of the plate thickness but generally up to 100mm think plate is commercially available.

Prison doors, grilles gates and security steel work is all manufactured to Home Office drawings. Confidentially agreements restrict the information available on these products but all security items supplied are manufactured and installed to the current Prison standards.

Flood Defence Windows are unique and have been designed not only to take a static head of water but also withstand a flotsam impact load of 1000 kg travelling at a speed of 4 m/s and debris. These windows are resin anchored and drilled into existing masonry as standard window and then sealed with a two-part mastic system developed and tested at the same time as the window.

An alternative defence solution to permanent steel Floodgates are demountable stop logs assemblies. Steel Gates or doors have an unacceptable visual impact on a property. We offer a light weight protection stop logs system manufactured in UPVC that is strong, and rapidly deployed, unobtrusive and non corrosive.

The barriers are designed for on seat water pressure applications (water pushing the stop log onto the frame) and retained by a quick action clip assemblies. These defences protect window, doors, patio doors, garage doors and driveway entrances.

The stop logs frame assembly is permanently fixed and rebated onto the floor to remove trip hazards and carefully positioned to minimise visual appearance. The stop log panels stack in multiples of 200mm allowing you to increase or decrease the level of protection in seconds as water levels rise and fall.

This defence system has been tested to a depth of 1100mm and a water pressure of 3.4 tonnes and carries a BS kite mark PAS 1188-1 and a patent design. The UPVC boards are manufactured only in white as is the frame assembly, the alloy frame can be re-painted by the customer with any oil based gloss to suit the surrounding stone or brickwork after installation.

The Floodgates are a hinged assembly designed to operation by a single person using minimum effort in normal weather conditions.

The latching operation takes no more than 20 seconds to fully close and lock the gate from the fully open position with no requirement to wind down or raise the seal assemblies.

The single latching assembly is a very robust simple acme thread design and virtually indestructible, manufactured from all stainless steel with a bronze nut housing and a base pivot assembly that is lined with two bronze thrust washers. An operating spanner is required and supplied to open and close the gates, there is an option available to padlock the latch assembly to prevent unauthorized access.

The Floodgate hinges are manufactured from mild steel and supplied with stainless steel hinge pins and grease points, these hinges are fully bearing assemblies but for coastal applications the thrust races are replaced with thrust washers manufactured from marine bronze.

The gate seals are a hand made composite construction, manufactured from expanded neoprene sponge and VS sponge then covered in a 2mm solid neoprene skin, this construction ensures durability and compress ability.

The gates are supplied as standard with a 400 micron multi coat epoxy paint system for durability and minimum maintenance. Coastal protection requires additional abrasion resistance with optional glass flake coatings supplied as required. All gates are available in any RAL or BS colour.

www.defencedoors.com