Whether or not mezzanine floors will need to be fire rated to the underside depends on the intended use of the mezzanine floor. For mezzanine floor fire protection, fire rated suspended ceilings, column casings, fire rated soffits and bulkheads within the ceiling void can be required to allow the installation to comply with fire engineering issues that may be raised by Building Control Regulations.
Mezzanine floor fire protection does not need to affect the look of your workplace. Fire rated ceilings can look identical to a non-fire rated suspended ceiling, but use fire resistant (intumescent) ceiling tiles.
We can also supply and install fire protection to mezzanine staircases, lift enclosures, to steel partitioning, to office partitioning and to multi-level floors as required by a file plan.
Our mezzanine floor fire rating is made from the highest grade of materials, all of which are certificated to show they have reached the required standard of fire protection.
Typical ratings for a fire rated suspended ceiling would be “one hour fire rating”. As a basic guide, any mezzanine structure exceeding 20m in one direction would generally be considered for fire rating by the Building Control Inspector, as would a structure that occupies more than 50% of the enclosure (ie building or chamber) it sits within. Other classifications are by use, with any activity that involves the continuous occupation of people usually meaning the fire rating of the floor will be required. However, NSI are experts at designing floors and office where the expense of fire rating the mezzanine floor is removed by the Inspector due to other risk reducing factors in NSI’s design.
Lighting choice should also feature heavily in the design – surface mounted lights (e.g. strip lights) do not require any protection, but recessed lighting units require a protected lighting box or tent above the light module that forms an integral part of the mezzanine floor fire protection.