O F
requirements of wet riser/ wet riser-cum-downcomer installations and capacity of water storage tanks and fire pumps shall be as specified in Table 3. The typical arrangements of wet riser-cumdowncomer and wet riser installations are shown in Fig. to 5. The wet riser shall be designed for distribution ensuring that unduly high pressures are not
developed in risers and hose pipes.
6. JO.3 First-aid fire fighting appliances shall be provided and installed in accordance with accepted standards The fire fighting equipment and accessories to be installed in for use in fire fighting shall conform to accepted standards IO)].
TABLE 3 TYPICAL FIRE FIGHTING INSTALLATIONS/REQUIREMENTS
SL TYPE OF THE REQUIREMENTS
No. , A
Water Supply Pump Capacity
installation
Near the At the Terrace
ground Static Tank ground Level
Tank
Buildings 0) or
room-ing houses (A-I), dormitories (A-J) (A-5)
I) Up to IS m in height
NOTE-NO pro-visions are necessary for dormitories housing less than 25 per-sons.
2) Above m in height but not exceed-ing 24 m.
3) Above 24 m in height but not exceed-ing 35 m.
(3)
Nil
One wet riser-cum-downcomer per
I 000 floor area.
The riser shall be fully charged with
pressure at all times, and shall be automatic in operation.
One wet riser-cum-downcorner per
I floor area.
The riser shall be fully with pressure all and shall be automatic in operation.
(4) (5) (7)
Nil Nil Nil
100000
litres 2400 per
pvmg a pressure not less than 0.3 N/mm’. at the topmost tiydrant.
litres per minute giving a pressure not less than 0.3 N/mm* at the topmost hydrant.
100000
litres 20 000 i) 2 litres per
litres minute giving a 900 litres per minute giving a pressure pressure not not less than than 0.3 0.3 at the The pump pro- topmost hydrant.
vided will be of multi-stage type with and delivery sires not dia with low kvel riser up to IO and high level riser delivery for upper floors.
ii) A standby pump of equal capacity be provided on alternative source of supply.
T A B L E 3 INS
No.
Supply
U n d e r ? , - -
At the Terrace
ground Static Level
per b e fully charged at all
shall be automatic
an k Tank
hires
i) per
a not than 0.3
he pro-vided be of a n d not than cm
low riser up to
and high upper 4) 35 nl Nil
but not
rn.
Above m in height but not exceed-ing m
6) Above m in
One
per I floor he riser shall be fully charged adequate pressure at all and shall be automatic in
One wet downcomer per
I floor area. The shall be charged with adequate sure at all
and shall be automa-tic operation.
000
ii) A standby pump equal capacity shall be provi-ded on
source of supply Nil i) 2 litres per
minute giving a pressure not less than 0.3 The pump pro-vided will be of multi-stage type with suction and delivery not less than cm dia with low level riser up to storeys and hrgh level riser deli-’
very for upper floors.
ii) A standby pump of equal capacity be provi-ded on alter-native source of supply Nil i) 2 litres
a pressure not than 0.3
The pump provi-ded will be of multi-stage type with suction and delivery sizes not less than cm dia with low level riser up to
storeys and high level
delivery
Nil
Nil
N A T I O N A L
TABLE 3 TYPICAL FIRE FIGHTING Conrd SL TYPE OF
No. , .
b) One (A -2) ond
houses (A-4)
I) up to rn Nil in height Note-One or two family
m in shall not be
2) Above in height but not exceed-ing 24m.
3) Above 24 m in height but not exceed-ing 35 m -with
Type of installation
Water Supply Pump Capacity
Under- Near the Under- At the
ground Static Tank ground Static Level
for upper up to m.
pump of equal performance with a break tank of litres capa-city at 75 m level and set of ball valves
supply the tank with at least 2 400 litres per minute from the first pump.
Alternatively, a multistage, multi-outlet
may be
ii) A standby pump of equal capacity shall be provided on alternative source of supply.
Nil Nil Nil
One wet downcomer with provision of fire service inlet only near ground level per I 000 floor area
Nil
litres
Nil
Nil
450 per
at the hydrant.
One wet riser-cum-pmg area up downcomer per
I 000 floor area.
and The riser shall be the fully charged with
20 litres
minute giving a giving a not
than 0.3 N/mm not
0.3 N/mm at shopping adequate pressure
at the topmost hydrant.
hydrant.
PART IV FIRE PROTECTION
T A B L E 3 T Y P I C A L F I R E F I G H T I N G TYPE OF THE
No. BU I L D I N G!
Type of Water Supply Pump Capacity
i n s t a l l a t i o n l
Under- Near the Under- At the Terrace
ground Static Tank ground Static Level
Tank Tank
(4) (5) (6) (7)
(3) areas to at all times. and shall the ground be automatic in floor only. operation.
-with shop- One wet
riser-cum-ping area per
exceeding I 000 floor area.
250 The riser shall be fully charged with adequate pressure at all times. and shall be automatic in operation.
4) Above 24 m One wet riser-cum-in height but downcomer per not exceed- I 000 floor area.
ing 45 The riser shall be fully charged adequate pressure at all times. and shall be automatic in
5) Above 45 m One wet riser-cum-in height but downcomer per not exceed- I 000 floor ing 60 m. area. The riser shall
be fully charged with adequate pressure at all times, and shall be in operation.
6) Above 60 m One wet riser-cum-in but downcomer per not exceed- I 000 floor ing 92 m. area. The riser shall
be fully charged with adequate pre-ssure at all times.
and shall be auto-matic in
The riser shall be fully charged with adequate pressure at all times and shall
in
2 400 litres per 900 litres per minute minute giving a giving a pressure not pressure not less than 0.3 N/mm”
than 0.3 N at the topmost at the topmost hydrant.
hydrant.
I 800 litres per 450 litres per minute minute giving a pressure not pressure not less
2 400 litres per 900 litres per minute giving a giving a pressure not pressure not less less than 0.3 mm*
than 0.3 N at the topmost at the topmost hydrant.
hydrant.
2 400 litres per litres per minute minute giving a giving a pressure pressure not not less than
than 0.3 0.3 at the
at the topmost topmost hydrant.
hydrant. The pump with low level riser up to and high level riser delivery for upper
giving a pressure not less than 0.3 N/mm’
at the topmost hydrant.
(
NATIONAL. l UlwFlC
TABLE 3 TYPICAL FIRE FIGHTING
TYPE OF THE REQUIREMENTS
No.
Type of Water Supply Pump Capacity
Near the At the ,
area. The riser shall be fully charged with adequate pressure at all times and shall be automatic in tion.
2 400 per minute giving a
900 litres per minute giving a pressure not not less less than 0.3 sizes not less than 15 cm dia with low
ii) A standby pump of capacity
height but not downcomer per litres exceeding 24 m. I 000 floor
area. The riser shall be fully charged with adequate pressure at all times. and shall be automatic in opera-tion.
c) Above 24 m in One wet riser-cum- 100 000 height but not downcomer per litres exceeding 35 m. I floor area.
The riser shall be fully charged with ade-quate pressure at all times, and shall be automatic in NOTE
operation.
Assembly build-ings above 35 m in height shall
litres per minute a pressure ess than 0.3 N/mm the topmost hydrant.
the topmost
Nil
i) 2 400 litres per 900 per minute minute giving a giving a pressure not pressure not less less than 0.3 than 0.3 N/mm*. at the topmost The pump pro- dia with low level riser up IO
and high level riser delivery for floors.
ii) A standby pump of capacity
TABLE 3 TYPICAL FIRE FIGHTING
TYPE OF THE REQUIREMENTS
No. ,
Water Supply Pump Capacity
Near the At the Terrace ground Static Tank ground Static Level
Tank Tank
b) Above m in One wet riser-cum-height but not downcomer per exceeding 24 m. I 000 floor area.
The riser shall be fully charged with ade-quate pressure at all times, and shall at automatic in opera-tion.
Above 24 m in One wet riser-cum-height but not downcomer per exceeding 35 m. I 000 floor area.
The riser fully charged with ade-quate pressure at all
and at
litres 20 000 2 400 litres per 900 litres per minute litres minute giving a giving a pressure not pressure not less than 0.3 N/mm’
than 0.3 at at the
i) 2 400 litres per 900 litres per minute minute giving a giving a pressure not pressure not less, less than 0.3 than 0.3 at the topmost The pump provi- hydrant.
ded will be of multi-stage type with suction and delivery sires not less than 15 cm dia with low level riser up to IO
The riser shall be fully charged with
riser-cum-height but not downcomer per litres exceeding 92 m. floor area.
The riser shall be charged with ade-quate pressure at and shall be less than I5 cm dia with low level dia with low kvel
Nil
TABLE 3 TYPICAL FIRE F I G H T I N G I N S T A L L A T I O N S / R E Q U I R E M E N T S -
OF THE RE Q U I R E M E N T S
NO.
Type of i n s t a l l a t i o n
Water Supply Pump Capacity
Near the At the Terrace’
Tank ground Static
Under-ground Static
Tank Tank
Above 92 in One wet
riser-cum-height downcomer per
m’floor ara.
The riser shall be charged with ado quate pressure at all times, and shall be automatic in opera-tion.
Storage
a) One wet
riser-cum-height downcomer per
I 000 m’floor area.
The shall be charged with
pressure at all tunes, and shall be automatic in tion.
NOTE-Hazardous buildings above IS in height
be
250 litres
100000
Nil
20 ooo litres
riser up to storeys and high level riser for upper ii) A standby pump of
equal capacity shall be provided on alternative source of supply.
2 litres per minute giving a pressure not less than 0.3 pump provided will be of multi-stage type with suction and deli-very sizes not less than cm dia with low level riser up to storeys and high level riser delivery for upper floors up to 60 Another pump of e q u a l p e r f o r
-mance with a tank of 000 litres capacity at 75 level and a set of ball valves to supply the tank with at least 2 litres per from the first pump. Alterna-tively. a multi-stage, multi-outlet pump may be installed.
Nil
ii) A standby pump of capacity shall be provided on alternative source of supply.
I litres per 450 litres per minute minute giving a
pressure not kss
giving a pressure not than 0.3
than 0.3 at the the topmost hydrant.
hydrant
(Continued)
TABLE 3 TYPICAL FIGHTING
THE
Type o f i n s t a l l a t i o n
the At the Terrace
ground Static Tank ground 1
Tank Tank
b) m in
but not 24
One wet 2 per
per minute a giving a pressure
floor area. pressure not than 0.3 mm
riser he 0.3 at the topmost
with the topmost hydrant.
pressure at all hydrant.
and shall in opera-tion.
24 m shall not be per-mitted.
I Where more than one riser is because of large floor area, the quantity of water recommended in this table be proportionately Increased.
2 -- Any of the above categories may an automatic sprinkler! drencher system. the risk such that it requires installation methods. system is installed, water
installations shall be in addition to indicated in this Table.
A minimum of hydrants shalt be provided the courtyard.
4 Wet riser-cumdowncomer an for fire the by of vertical mains no! than mm internal dia hydrant outlets and hose on each landing connected to a terrace
!ank for fire fighting purpose, through a booster pump, check valve and a non-return valve near the tank-end and a fire pump, gate and non-return valve, over the underground static tank. at ground level fitted a return valve shall also be provided to the rising for charging it by fire services pump in case of failure of static fire pump over the underground static tanks.
NOTE The performance of pumps specified above be at revolutions per not exceeding 3 000.
6 -- he terrace tank and need not be if theautomatic pump at ground level can be maintained lo the satisfaction of the fire brigade.
7 The above quantities of water shall be for fire and shall not be utilized for or other use.
8 Size of the be as under diameter):
a )
up to 45 m -- mm with single! twin hydrant outlet and hose reel on each ii) above 45 to m mm with twin hydrant outlets and hose reel on each floor.
iii) above 85 to 165 m mm with hydrant and hose reel on each floor.
b) Buildings rhon houses
up to 24 m 100 mm with hydrant outlet and hose reel on each floor.
above 24 to 85 m mm with twin hydrant outlets and hose reel on each floor.
iii) above m to m 200 mm with twin hydrant outlets and hose reel on each floor.
E -- A facility to boost up water pressure in the riser directly from the mobile pump shall also be provided on the wet riser system with a suitable fire service inlets (collecting head with 2 numbers of 63 mm inlets for risingmainand4 numbers of 63 mm with check valves for mm dia rising main) with check valve and a gate valve.
-- Internal diameter of rubber hose for hose reel be minimum I2 mm. A shut-off branch with nozzle of5 mm size shall be provided.
An arrangement of alternative source of power supply shall be provided to drive pumps, case of failure of normal power supply.
For typical layout of wet and wet riser installations. see Fig. to 5.
R E L E A S E VALVE
TERRACE TANK FOR FIRE FIGHTING/DOMESTIC
SUPPLY
CHECK VA LV
S E R V I C E -INLET
VALVE
Fig. I Typical Arrangement of Wet Riser- cum-Downcomerfor Apartment Houses Above m hut not Exceeding m in Height
In addition to wet riser wet cum-downcomer. first-aid hose reels shall be
installed on all the floors of buildings above m and shall conform to accepted standards I I)]. The first-aid hose reel shall be connected to one of the female couplingsof twin couplings of landing valves of the wet riser installations by means of adapter.
ST A T I C WA T E R ST O R A G E TA N K S- A satisfactory supply of water for the purpose of fighting shall always be available in the form of underground static storage tank with capacity specified for each building with arrangements of replenishment by main or alternative source of supply at the rate of 000 litres per minute. When this is not practicable,
F I R E
the capacity of static storage tank(s) shall be increased proportionately in consultation with the local fire brigade.
The static storage water supply required for the above-mentioned purpose shall entirely be accessible to the fire engines of the local fire service. Provision of suitable number of manholes shall be made available for inspection, repairs and insertion of suction hose, etc. The covering slab shall be able to withstand the vehicular load of tonnes.
The domestic suction tank connected to the static water storage tank shall have an overflow capable of discharging 2250 litres per minute to a visible drain point from which
TERRACE TANK FOR FIRE FIGHTING/
AIR RELEASE VALVE
SLUICE AND CHECK VALVE
FIRE SERVICE
CHECK VALVE
TANK