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E & M 4-sided enclosure
Fire protection for electrical and
mechanical services is crucial where the
systems must remain functioning until
all personnel have escaped in case of
fire. The systems may include:
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Electrically operated fire alarms
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Emergency escape route lighting
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Electrically operated extinguishing systems
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Power supply for fire
service elevators in high-rise
buildings
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Water mains to
sprinkler system
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MONOLUX®
enclosure systems for building services
are designed to prevent the spread of fire from one compartment
to another for periods of up to 240
minutes. Cable ducts
constructed from MONOLUX®
boards carrying non fire rated
cables provide an inexpensive solution to fire protection
when compared to alternatives using fire rated cables. For more details on how to maintain cable functionality under fire
conditions, please consult Intumex Asia Pacific.
MONOLUX® can be installed in the following configurations,
all of which are suitable for ducts exposed to either internal
or external fire: |
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Fire resistance (BS 476: Part 20: 1987)
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Board thickness
(mm) |
Dimensions of duct
(mm) |
Rock wool
(thickness x density) |
Stability &
integrity
(minimum)
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Insulation
(minimum) |
| 120 |
120 |
16 |
Up to 3000 wide x 1500 high |
50mm x 100kg/m³ |
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240 |
240 |
25 |
Up to 3000 wide x 1500 high |
100mm x 100kg/m³ |
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Steel cable ladders or trays, independently supported from the
building structure. |
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MONOLUX® board, thickness dependant upon fire resistance
requirements, Please consult Intumex Asia Pacific for details to
meet your specific performance requirements. |
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Galvanised steel angle, nominal 25mm x 25mm x 0.6mm at board
corners. Note that this angle is not always required, thicker boards
can be simply screwed or stapled edge to face. |
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Corrosion resistant screws at nominal 200mm centres, or steel
wire staples at 100mm centres. Length of screws and staple
dimension dependant upon the thickness of the MONOLUX® boards
and the fire resistance levels. Please consult Intumex Asia Pacific
for details. |
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Galvanised steel channel framing at nominal 1220mm or 610mm
centres (dependant on overall duct dimensions) 50mm x 35mm x
0.6mm nominal size. |
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Hanger support system for cable ladders. |
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Threaded rods and Galvanised steel angles or channels forming
support system for MONOLUX® enclosure. Maximum stress levels
should not exceed 10N/mm² or 6N/mm² for two and four hour
systems respectively. |
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Rock wool, thickness and density depends on fire resistance
performance requirements. |
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MONOLUX® board pads minimum 100mm x 100mm x cladding
thickness to close off gaps around cable tray support hanger (6) |
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240
minutes fire rating |
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* For more detail,
roll your cursor over the
individual numerals in
this technical drawing above. |
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E & M 1-sided enclosure |
E & M 2-sided enclosure |
E & M 3-sided enclosure |
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Note:
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The rock wool shall be fixed into the underside of
the top boards using screws and mudguard washers
(minimum 25mm diameter). Minimum penetration of screws
into the board is 20mm. The screws should be in a staggered
grid pattern of 300mm in both directions.
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An additional row of screws should be included at 50mm from the
corners of the duct spaced at 300mm centres down
the length of the enclosure.
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If the enclosure exceeds 600mm in height, additional
screws will be required along the top edge to retain the rock
wool panels to the sides of the ducts.
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Where enclosures exceed 1500mm in width, intermediate drop rods
are required at the centre of the span to act as stiffeners. Please
consult Intumex Asia Pacific for details.
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