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8/13/2019 SIEW_RI ME

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INSPECTION OF M&E FIRE

SAFETY WORKS

PRESENTED BY: SIEW YEE CHEONG


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Topics to be Covered1) Obstruction to Sprinklers

2) Fire Rated Duct

3) Fire Rated Pipe

4) Auto and Manual Start/Stop of MV Fans

5) Auto and Manual Start of Engineered Smoke Control System

6) Hot Smoke Test


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Obstruction to Sprinklers Vertical Obstruction (Large Duct, Deep Beam, Drop Ceiling)

Sprinklers at Close Spacing

Plan Obstruction

Royal Flash Sprinkler


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Fire source

Coverage Areaoverlapped by

sprinklers

S S

Wall

< S


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Fire

source

Area under

duct is not

protected

Coverage

Area

overlapped

by sprinklers

S S

S S


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Sprinklers blocked by

deep beam

(insufficient coverage)

Fire

source

Coverage

Area

overlapped

by

sprinklers

S S

All areas

fullyprotected by

sprinklers

Supplementary

sprinklers

under beam

Fire

source

S S

Deep Beam Obstruction


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Fire

source

S S

Partial Area

not

protected

Fire

source


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Plan Obstruction


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After Rectification Works

Adjusted and added sprinklers to the 4 cubicle at sensory room


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Sprinkler Point


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Fire Rated Duct

(Ventilation, Kitchen Exhaust and Smoke Extract Duct)

Proprietary System

a) Cladded on steel duct using building boards (mainly calcium silicate

based) of various thickness and density with mineral wool insulationb) Sprayed on steel duct with thick vermiculate spray (Vermiduct)

c) Sprayed on steel duct with fine vermiculate spray (Flambar BW11)


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Fire Rated Duct Installation

General Requirements

To be provided for smoke control system, kitchen exhaust system (horizontal

duct only) and ducts serving special occupancies where fire dampers are not

permitted. eg., FCC, fire pump room, generator room, and etc. Same fire resistance rating as the wall/ floor unless otherwise stated.

PE Certificate of Supervision for Special Materials.


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Typical non-compliance

Use of non-approved system.

Fire rated duct suspended from non-fire rated structure.

Perforations and penetrations by other services for cladded on duct.

Other ducts or service running directly above fire rated ducts.(Fire rated duct used to support other services)

Workmanship and supervision of construction integrity.

Hatch opening not properly constructed.

Product without Certificate of Compliance (COC)


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a. Cladded on steel duct using building boards (mainly calcium silicate based)

of various thickness and density with mineral wool insulation.


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b. sprayed on steel duct with thick vermiculate spray (Vermiduct)


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c. sprayed on steel duct with fine vermiculate spray (Flambar BW11)


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Fire Rated Pipe(dry or wet riser) proprietary system

a) Cladded on steel pipe using building calcium silicate boards

b) Cladded on steel pipe using vermiculate boards

c) Sprayed on steel pipe using vermiculate mortar


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Fire Rated Pipe Installation


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Fire Rated Pipe Installation

Cladded on steel pipe using calcium silicate boards


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Fire Rated Pipe InstallationSprayed on steel pipe using vermiculate mortar


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Any non-compliance?


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Any non-compliance?


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Dry riser located outside stair


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Any non-compliance?


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Mechanical Ventilation System for Stair, Internal

Exit Passage and Smoke Stop Lobby

General Requirements

MV to be provided if Natural Ventilation is not available or not adequate.


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System requirements Independent system.

Supply mode.

10 air-change/ hour for lobby.

Riser in separate masonry shaft.

Fans connected to emergency power supply.

5m separation distance from other exhaust discharge.

Horizontal duct outside staircase/ passage by fire rated duct.

Activate by building fire alarm system; and manual remote starting at FCC/ MAP.

For lobby system, vertical fire dampers can be provided at shaft openings


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Staircase Pressurisation System

General Requirement

Internal stair in building exceeding 24m in height.

Basement stair serving more than 4 storey.

Specifically required by FSSD.


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Staircase Pressurisation SystemSystem requirements

Activate automatically upon building fire alarm.

Manual start/stop and status monitoring at FCC/ MAP.

Fans to be connected to emergency power supply. Maintain pressure gradient such that the pressure at the exit stair is higher

than the smoke stop lobby, pressure differential around 50 Pascal.

Force to open any door not exceeding 110N.

Air velocity across door opening with 2 doors from any 2 successive storeysand the main discharge door fully open at least 1m/s.

5m separation distance.

Distribution of Pressurisation air.

Relief device.


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Basement Carpark Smoke Purging System

(Conventional Ducted Design)

General Requirement

For basement carpark with total floor areas exceeding 2000 sq.m.


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Basement Carpark Smoke Purging System

System requirements

Independent system.

Smoke purging rate at 9 air change/ hour (normal MV requirement at6 air change/ hour.

Activate automatically by building fire alarm.

Manual starting/ stopping and status monitoring at FCC/ MAP.

Interlocking of FA and EA fans. No FA fans if opening is larger than2.5% of floor area.

5m separation distance.

Exhaust ducts constructed of 1.2mm thick gauge sheet and no firedampers.


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Atrium Smoke Control System

General Requirement

Applicable only for Atrium

Building to be sprinkler protected


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Atrium Smoke Control SystemSystem requirements

Engineered design system.

Usually involves multi-scenarios. (Auto start by dedicated smoke detector)

Performance specification to maintain smoke layer at not less than 2.5mabove floor. Fire size depending on occupancy.

Adequate low level fresh air intake for replenishment.

May be in the form of natural vents (with fail safe feature) or mechanicalextraction (with excess capacity and emergency power.

Compliance with other prescription requirements of Cl. 7.6.

Status monitoring Fans, Smoke Vent, Smoke Curtain, Replacement air inlet. Manual start based on selected scenarios.


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Manual Start/Stop of MV Fans

General Requirement

(stair MV , stair pressurization, carpark smoke purging, STL/FFL MV)

A manual start-stop switch to be made available to firemen at FCC or MAP

System Requirements

Switch to over-ride fire alarm signal.

Ability to manual start without fire alarm signal.

Auto re-starting of fans upon change to emergency power under fire alarmcondition.

Fans should not auto reset upon resetting of fire alarm.


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Manual start of Engineered Smoke Control System

General Requirement A remote manual activation and control switches to be provided at

FCC or MAP

System requirements Manual activation according to design scenarios.

No requirement to manual stop the fans or close smoke vents during smokedetector activation condition.

Auto re-starting of fans upon change to emergency power under smokedetector activation condition.

Fans, smoke curtains, smoke vents & etc should not auto reset uponresetting of smoke detector.

Fans may not re-start upon change to emergency power if there is no firealarm condition.


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Garden by the Bay


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PB DesignNon-compliances include the following

Travel Distance

Exit Capacity

Exit Discharge

Engineering smoke Control Design

Omission of Sprinkler Protection below envelope

Unprotected elevated walkways (cool moist conservatory only)


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Duties of RI (M&E) Review the FEDB, FER and Engineering smoke control design agreed by fire

size at the gardens are 3 MW (for Christmas tree fire) and 1 MW (for rubbish

fire in flower field)

Carry out physical test of the smoke scenario, ie., smoke detection by

aspirating smoke detector, opening of sunshield, smoke vents, replacementair inlet, tripping of AHU and signal to FCC

Test the manual start function

Witness hot smoke test

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