FRAME Calculation examples book. - FRAME Fire Risk Assessment ...

F.R.A.M.E.
Special Protection addressable automatic
S= 2.41
fire detection
Fire resistance Structure: 15
steel
F=1.06
Walls: 0
Ceiling: 15
Partitions:0
Escape protection max. 300, detection,
U=3.46
protected staircase
Salvage none Y=1.00
Calculated Risks: R= 0.38 R1= 0.43 R2=0.43
Conclusion:
The risk levels were lower than the code complying concept.
There is equivalency.
Other equivalent concept calculations.
The next table gives an overview of other similar calculations that have been made to prove
the equivalency of concepts with FRAME.
Description R R1 R2
4500 m² warehouse for combustible liquids, 7.5 m high ,
concrete construction . Fire load was estimated at 10950
MJ/m². The building as +/- 1 % smoke vents, part of it is
“zone 2 classified”, and public water supply is limited. There
is a pre-action sprinkler system actuated by heat detectors.
No internal separations exist.
The code requirements (at the time the building was built)
2005
per
1.02
4.28
0.87
1.42
0.45
1.76
are to have R30 fire resistive construction and sub
compartments for the flammable liquids.
Note that these code requirements are far below the FRAME
recommended levels.
code
A 19 th century post office, which was externally protected as 2002 0.21 0.39 0.22
historical building found a new destination as a civil court.
The building was only 500 m² large, but had 20 %
mezzanines, as the architect opened the upper floors of the
building to bring more light in it. This did not fit with the
prescriptive codes that the local authorities applied, unless
some of the partition walls would be made of fire resistive
glass. This would be very expensive and spoil the architects’
concept.
As an alternative, sprinkler protection was proposed for the
building, as well as automatic fire detection.
The FRAME calculation indicated that installing both
sprinklers and fire detection was overdone, but the project
manager maintained both to avoid further discussions with
the local fire authorities.
A new housing project combined two 4 level apartment
buildings of each 400 m² floor area with a covered internal
court yard. The prescriptive code defines this arrangement
as an atrium, that has to be fire separated from the adjacent
buildings and the exits are not allowed to go through this
atrium. Each level of each apartment block would then be a
separate compartment. The code complying risk calculation
considered only 36 persons to be evacuated per level.
2004 0.54 0.89 0.55
48