there are paints that you can apply to steel and timber which will give fire protection.

If you Google Class 0 surface spread of flame paint you'll fine plenty of options.

Posted By: Triassicplasterboard

Probably not in a sports facility?

How about using Magnesium Oxide Structural Insulated Panels (SIPS).

Fire resistance and non-combustibility– MgO panels have been tested to BS EN 13501 – 1:2007 standards and achieved a “Class A1” accreditation.

http://www.sptsystems.co.uk/mgo-sips-panels/

It is a stupid idea.

The SIP has no inherent fire resistance, so will need fire resistant linings to acheive 30 or 60 minutes fire resistance.

There is also the need to control surface spread of flame. Intumescent paints are expensive and may not work well on OSB as a sub-straight. They will also require regular re-application to maintain the reaction to fire performance.

For a large structure such as a sports hall, I would imagine it will require a substantial timber or steel frame to work and so the SIPs are likely to be more of an infill system rather than a structural system.

Re the intumescent coating issue. It's a very common way of bringing timber surfaces up to Class 1 or Class 0 surface spread of flame classification for internal use on buildings.

I'm just finishing work on a £15M new-build sports center which has a large 8 court sports hall which is completely lined internally with 2.4m x 1.2m ply panels. We've used a clear intumescent 'paint' coating to bring it up to the required Class 1. It's a 2 coat system and doesn't need regular maintenance or any re-application. We've used it in a clear semi-matt finish so that the grain of the ply is visible.

The 8 court sports hall is just one small part of the overall building.

There are lots of different manufacturers who make surface applied intumescent paints suitable for upgrading internal timber finishes to Class 1 or 0 surface spread of flame. The specification will depend on what you want to achieve in terms of final appearance.

Dulux have a product called Pyroshield and Crown have one called Timonox but there are lots of different suppliers who manufacture suitable products.

Trada info sheet here: http://www.trada.co.uk/images/onlinebooks/0C67BA02-7E61-4F95-8EC8-CFA99FA8B496/

There are no specific requirements for the fixings on our project for the ply wall lining as it is non-structural. The intumescent paint is a very simple system and doesn't rely on any special fixings for the wall panel it is being applied to. You do however need to be careful with any subsequent maintenance related overpainting of the panel - any paints put onto the panel in subsequent years as part of a maintenace regime would need to be compatible with the underlying class 1 or 0 paint.