Fire Rating Existing Floors

Fire protection rating is calculated from the flame side of the assembly and of course some assemblies have multiple flame sides.

Fire rating existing floors. The fire area is the combined area of the floor in between fire walls fire barriers exterior walls or horizontal fire barrier assemblies within a building. The majority of stonhard products qualify for a class 1 rating. They are a function of the height of the building measured in the same way as described for approved document b the occupancy and the floor area of the compartment fire resistance requirements are either short 30 minutes medium 60 minutes or long 120. One of the problems associated with fire protection in exisiting buildings and heritage properties is being able to bring the building up to the current fire regulations whilst being able to maintain the architectural detail of the original building.

Typically the fire rating is a combination of the full floor build up from ceiling through to the top of the floor but we are also able to provide details for fire resistant floors that incorporate exposed timber beams. Fire resistance rating of single layer concrete walls floors and roofs multiple layer walls floors and roofs there are several methods such as graphical numerical and analytical solutions provided by aci 216 1m 7 that used to determine the fire resistance of walls floors and roofs composed of two or more layers of different types of concrete masonry or both. I am having difficulty finding any information or persons that would be helpful with resolving this matter. Structural fire resistance requirements in scottish technical handbook 2 for multi storey buildings are contained in section 2 1 1.

Our team of territory managers architectural and engineering representatives will assist you in finding the fire resistant floor or wall system to meet your specific needs. At a recent special exceptions hearing pertaining to the rehabilitation of a stone home circa 1810 the board of appeals requested information on the burn time fire rating of the existing large wooden ceiling beams and floors. For over 25 years fireseal have been the leaders in upgrading existing buildings and heritage properties. Find out more about the lewis deck system here.

The implementation of fire safety regulations has taken its toll on historic building fabric over the last half century as enforcers have tried to impose the prescriptive recommendations given in the guidance published in support of national regulations such as approved document b fire safety. The total fire rating is determined by adding each component to reach a minimum total of 60 minutes. We have a project where an architect is questioning if a 4 1 2 slab is thick enough to provided with a code perscribe fire rating of 2 hours. All stonhard floors and walls are fire resistant.

Note that in this definition multiple stories can be included in the calculation for fire area if each floor ceiling assemblies separating each story are not rated horizontal assemblies fire barriers.