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Fire doors

Successful steel door fire tests could lead to ‘industry breakthrough’, says Rhino Doors

Rhino Doors has reported that its El260 fire door series has successfully completed its first stage of fire insulation tests, which the company believes could lead to a “fire safety breakthrough” for the UK’s construction and infrastructure sectors.

RhinoDoors-FireTests-20The full-scale fire tests, carried out at Warringtonfire on Rhino’s El260 fire door, achieved significant overruns on both integrity and insulation exposure time targets, with the insulation overrun in particular indicating that the much more demanding performance required for an El2120 rated product will be met during future development tests later this year.

Why does Rhino believe this will represent a breakthrough?

At present, the company explains, steel fire doors with insulation ratings are not routinely used on major projects – this is largely due to the availability and specification barriers presented by existing insulated steel fire door products. Should further tests prove successful then Rhino Doors’ new range of El2 rated insulated fire doors will change this by offering specifiers access to steel fire doors with insulating ratings that are best practice, life safety options for all major construction projects in the future.

Rhino believes its new El2 range will make insulated fire doors far more widely available and affordable – meaning everything from high-rise projects to stadia and rail stations will be able to fit fire doors with higher insulation performance – radically improving fire safety across the UK and beyond.

The test

Illustrated above is the test protocol for the EN1634-1 standard which requires the furnace to increase in temperature at a prescribed rate, following the blue curve above. 

Commenting on the successful test of the doors, Stuart Lawrence, Managing Director of Rhino Doors, said: “When Rhino Doors’ special projects section identified that many current infrastructure projects do not specify insulated steel fire doors due to existing doors being overly expensive, aesthetically unpleasing or not offering the right level of protection, we wanted to change this situation.”

“The special project team’s solution has exceeded expectations. During the test Rhino’s El260 door continued to provide the required insulation protection as well as the standard integrity performance for an hour against temperatures reaching 945oC. This is the sort of temperature typically associated with ‘cellulistic’ fires where wood and other combustibles are the fuel; in other words, similar temperatures to building fires.”

“We’re very pleased with the results of this test which indicates we are not far from developing an insulated fire door with a two-hour rating, which will have a hugely positive impact upon fire safety in the construction and infrastructure sectors.”

Further developments

Rhino Doors is also working on versions of the doors that will protect against other threats as detailed by Rhino’s Chief Engineer, Dr. Chris Norris: “In addition to the achievement of the highest possible El fire ratings, our ultimate objective is to produce two new products that also provide the acoustic attenuation, physical attack and static pressure resistance increasingly demanded by specifiers and architects for major construction projects such as rail stations, stadia, and high-rise accommodation.”

Further tests of Rhino’s new El2 rated insulated fire doors are scheduled to take place this autumn.

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michael floyd
michael floyd
August 27, 2020 4:24 pm

A range of insulated steel doors which can compete strongly with wooden doors would be welcomed. The durability of such doors normally far exceeds wooden doorsets, which are rarely able to withstand high traffic and public abuse. These should become much more common in schools, high rise and shopping complexes. Almost every wooden doorset I see in these applications is out of adjustment or damaged.