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Spacing between hydrants outside building areas

Spacing between external hydrant and building

Spacing between external hydrant and tank shell

Number of hydrant for tank protection

Spacing between internal hydrants

Hydrant Outlets Shall be above _____ m from ground level

In special cases hydrants are allowed to install below ground, and the

hydrants shall be enclosed in a box of cast iron or Masonry of 750 mm

square which is 80 mm above ground level.

Stand posts size for hydrant/Monitor

Landing/Control/Cutt off valves for hydrants

Floor Area

Number of staircases

After 2000 sq.m one additional staircase to be provided for every 1500 s

Every floor landing one hydrants shall be provided

When the building height is above 15 m and no access staircase with hyd

When external hydrant is at a distance of 45m from any part of the buil

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Light Hazard Ordinary Hazard High hazard

60m 45m 30m

between 2 m to 15m between 2 m to 15m between 2 m to 22.5m

between 15m to 35 m between 15m to 35 m between 15m to 35 m

Tank dia 10m Tank dia 10m to 20 m Tank dia more than 20mOne double headed/Two

single headed

Two double headed/Four single

headed

Four double headed/Eight

single headed

30m 30m 30m

1m 1m 1m

hydrant top should not

below 80 mm from the top

of the box

hydrant top should not below 80 mm

from the top of the box

hydrant top should not

below 80 mm from the

top of the box

Single headed Double headed Monitor

80 mm 100 mm 100 mm

One Two One

less than 500 sq.m above 500 but less than 2000 sq.m Above 2000 sq.m

1 2 3

.m

ants than fire monitor to be provided

ing then internal hydrant to be provided.

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Places used

Stand pipe shall supply _____size hose connection to supply water for use

Manual stand pipe and dry stand pipeSpacing between standpipe

Spacing between hydrant and building

Stand pipe Size

Combined system Stand pipe

Hydrant Outlets Shall be above _____ m from ground level

Hose station location

Pressure Limitation

Pressure to be mainted at the hydraulicaaly most remote hose connection

Flow rate in the stand pipe/riser pipe

Flowrate for the hydrulically most remote standpipe

When additional stand pipe is used 976 L/min is to be considered but it should not e

When the floor area exceeds 7432 sq.m additional standpipe to be considered with 1

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Class I Class II

Fire department Building occupants and Fire

department

63.5 mm 38.1 mm/25.4 mm

Can be used Not to be used30.5m 30.5m

12.2m 12.2m

102mm 102mm

152mm 152mm

457mm 457mm

0.9 m to 1.5 m above ground 0.9 m to 1.5 m above ground

Not more than 24.1 Bar Not more than 24.1 Bar

6.9 bar 4.5 bar

1893 L/min 379 L/min

ceed 4731 L/min

893 L/min

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Class III

Building occupants and Fire department

38.1 mm/25.4 mm

Not to be used30.5m

12.2m

102mm

152mm

457mm

0.9 m to 1.5 m above ground

Not more than 24.1 Bar

4.5 bar

1893 L/min