Fusion Fire Performance

FusionX Fire safety at our core

We take fire and our responsibilities in this arena as an offsite manufacturer extremely seriously.

We recognise the market demands the highest level of certainty over how critical components behave when combined as part of an overall building solution. But, having worked in the offsite sector for over 23 years, we have an extensive range of fire solutions.

The proof is in the practical application of our experience to our products though and the below details how our external wall solutions – FusionX™ together with our light gauge steel (LGS) floor cassettes perform in a fire.

The information and data is intended for use in discussions about our system and how it might combine with other critical components, to ultimately help you make the right decision for your build.

The Fusion Team

Helping drive change

Following the Grenfell tragedy, we engaged with organisations across the construction industry as they reviewed how changes could be made:

SCI Member

SCI Steel Knowledge

As a member of the Steel Construction Institute’s (SCI) Light Steel Forum, we contributed to their fire guidance document, including best practice detailing

NHBC

NHBC Registered Builder

We also provided guidance from a light steel perspective for the NHBC’s review of their standards – particularly relating to fire, following Grenfell.

Fire Test: FusionX™

Masonry (External wall) and Cladding (External wall) fire ratings

Internal wall and twin wall fire ratings

60 Minute Build up

Scroll table to see more

Masonry (ExternalWall)

  • 2 x 12.5mm British Gypsum Fireline
  • 92mm Fusion Frame
  • 100mm Isover Steel Frame Infill Batt between studs
  • 12mm RCM Y-Wall
  • 100mm Isover Polterm Max Plus stone

Cladding (External Wall)

  • 2 x 12.5mm British Gypsum Fireline
  • 92mm Fusion Frame
  • 100mm Isover Steel Frame Infill Batt between studs
  • 12mm RCM Y-Wall
  • 100mm Isover Polterm Max Plus stone mineral wool

Internal Single Wall

  • 2 x 12.5mm British Gypsum Fireline
  • 92mm Fusion Frame
  • 50mm Isover Acoustic Partition Roll between studs
  • 2 x 12.5mm British Gypsum Fireline

Twin Wall

  • 2 x 15mm British Gypsum Fireline
  • 92mm Fusion Frame
  • 100mm Isover Acoustic Partition Roll between studs
  • 50mm Isover Acoustic Partition Roll within cavity
  • 92mm Fusion Frame
  • 100mm Isover Acoustic Partition Roll between studs
  • 2 x 15mm British GypsumFireline

90 Minute Build up

Scroll table to see more

Masonry (ExternalWall)

  • 3 x 12.5mm British Gypsum Fireline
  • 92mm Fusion Frame
  • 100mm Isover Steel Frame Infill Batt between studs
  • 12mm RCM Y-Wall
  • 100mm Isover Polterm Max Plus stone mineral wool

Cladding (External Wall)

  • 3 x 12.5mm British
    Gypsum Fireline
  • 92mm Fusion Frame
  • 100mm Isover Steel Frame Infill Batt between studs
  • 12mm RCM Y-Wall
  • 100mm Isover Polterm Max Plus stone mineral wool

Internal Single Wall

  • 3 x 12.5mm British
    Gypsum Fireline
  • 92mm Fusion Frame
  • 100mm Isover Acoustic Partition Roll between studs
  • 3 x 12.5mm British Gypsum Fireline

Twin Wall

  • 3 x 12.5mm British
    Gypsum Fireline
  • 92mm Fusion Frame
  • 100mm Isover Acoustic Partition Roll between studs
  • 50mm Isover 
  • Acoustic Partition Roll
    within cavity
  • 92mm Fusion Frame
  • 100mm Isover Acoustic Partition Roll between studs
  • 3 x 12.5mm British Gypsum Fireline

120 Minute Build up

Scroll table to see more

Masonry (ExternalWall)

  • 3 x 12.5mm British Gypsum Fireline
  • 92mm Fusion Frame
  • 100mm Isover Steel Frame Infill Batt between studs
  • 12mm RCM Y-Wall
  • 100mm Isover Polterm Max Plus stone mineral wool

Cladding (External Wall)

  • 3 x 12.5mm British Gypsum Fireline
  • 92mm Fusion Frame
  • 100mm Isover Steel Frame Infill Batt
    between studs
  • 12mm RCM Y-Wall
  • 100mm Isover Polterm Max Plus stone mineral wool

Internal Single Wall

  • 3 x 12.5mm British Gypsum Fireline
  • 92mm Fusion Frame
  • 100mm Isover Acoustic Partition Roll between studs
  • 3 x 12.5mm British Gypsum Fireline

Twin Wall

  • 3 x 12.5mm British Gypsum Fireline
  • 92mm Fusion Frame
  • 100mm Isover Acoustic Partition Roll between studs
  • 50mm Isover Acoustic Partition Roll within cavity
  • 92mm Fusion Frame
  • 100mm Isover Acoustic Partition Roll between studs
  • 3 x 12.5mm British Gypsum Fireline

Fire Test: LGS Cassette

92mm and 25mm cassette fire ratings

60 Minute Build up

Scroll table to see more

92mm Cassette

  • 28mm Cellecta ScreedBoard
  • 22mm OSB3 decking
  • 92mm Fusion Cassette
  • 100mm Isover Acoustic Partition Roll between joists
  • 16mm British Gypsum RB1 resilient bars
  • 2 x 15mm British Gypsum Soundbloc

254mm Cassette

  • 28mm Cellecta ScreedBoard
  • 22mm OSB3 decking
  • 254mm Fusion Cassette
  • 100mm Isover Acoustic Partition Roll between joists
  • 16mm British Gypsum RB1 resilient bars
  • 2 x 15mm British Gypsum Soundbloc

90 Minute Build up

Scroll table to see more

92mm Cassette

  • 28mm Cellecta ScreedBoard
  • 22mm OSB3 decking
  • 92mm Fusion Cassette
  • 100mm Isover Acoustic Partition Roll between joists
  • 16mm British Gypsum RB1 resilient bars
  • 3 x 12.5mm British Gypsum Fireline

254mm Cassette

  • 28mm Cellecta ScreedBoard
  • 22mm OSB3 decking
  • 254mm Fusion Cassette
  • 100mm Isover Acoustic Partition Roll between joists
  • 16mm British Gypsum RB1 resilient bars
  • 3 x 12.5mm British Gypsum Fireline

120 Minute Build up

Scroll table to see more

92mm Cassette

  • 28mm Cellecta ScreedBoard
  • 22mm OSB3 decking
  • 92mm Fusion Cassette
  • 100mm Isover Acoustic Partition Roll between joists
  • 16mm British Gypsum RB1 resilient bars
  • 3 x 12.5mm British Gypsum Fireline

254mm Cassette

  • 28mm Cellecta ScreedBoard
  • 22mm OSB3 decking
  • 254mm Fusion Cassette
  • 100mm Isover Acoustic Partition Roll between joists
  • 16mm British Gypsum RB1 resilient bars
  • 3 x 15mm British Gypsum Fireline

We recommend taking note of the following points:

Industry-approved

Our recommended fire details are based on the principles included in the Steel Construction Institute (SCI)’s publications, P372,  P402 and P424, and have been reviewed by NHBC/SCI, post-Grenfell, for use in buildings of up to 10 storeys, under the NHBC Accepts scheme.

Keep the steel cool

One of the most important factors in protecting a steel structure is to keep it cool. Our standard details have been designed to achieve this for the required periods, with protection provided by a combination of plasterboards, sheathing boards, non-combustible insulations, cavity barriers and fire stops.

Test evidence

The recommendations in this brochure are based on testing the Fusion system (walls, floors and cavity barriers), or on assessments based on test evidence. The conditions used in the tests (board types, jointing, fixing details, etc) should be followed on site and we can make this information available. If further assessments are needed to demonstrate the compliance of a project-specific build-ups, then these should be requested by the Principal Designer or main contractor from a UKAS accredited (or equivalent) body, before starting on site. This process can take up to four months. We will assist in this process, providing further information as needed.

Project-specific details

It’s the responsibility of the project architect or fire specialist to produce project- specific details based on the guidance provided by Fusion. We will provide comment on the efficacy of these details, using experience drawn from previous projects.

Products not covered by testing

Products which may materially affect the fire protection of the Fusion system but which haven’t been specifically tested, can only be used following the approval of a third party fire specialist.

Plasterboard packs

It is the responsibility of the Principal Designer to create the required plasterboard pack build up, covering all wall and floor types. This should include the specification of items such as fixings, spacings, jointing systems and materials to reflect those used
in the tests.

Compliance tables

It’s recommended that the lead designer creates a table to compare project build-ups with tested solutions, to highlight any variations from the tests, identifying possible assessment requirements, in partnership with the project fire engineer.

Disclaimer: While Fusion provides advice and data on fire protection to its structure, the Company does not provide any guarantees or warranties for fire protection. Fusion is not responsible for the overall fire performance strategy and project-specific detailing of a building, nor the fitting of the components which provide this protection. Advice should always be sought from a suitable qualified and experienced fire engineer on any aspect of a project which may affect a building’s performance in a fire..

Build with us

If you would like to discuss how Fusion products can help you on your next build project, please contact us.

Enquire now