CEA 4001 - Classification of occupancies and fire hazards; Hazard classes

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33

4.1.2 Necessary exceptions

Sprinkler

protection

shall

not

be

provided

in

the

following

areas

of

a

building

or

plant:

a)

silos

or

bins

containing

substances

which

expand

on

contact

with

water;

b)

in

the

vicinity

of

industrial

furnaces

or

kilns,

salt

baths,

smelting

ladles

or

similar

equipment

if the

hazard

would

be

increased

by

the

use

of

water

in

extinguishing

a

fire;

c)

areas,

room

or

places

where

the

water

discharged

from

a

sprinkler

might

present

a

hazard.

In

these

cases,

other

automatic

extinguishing

systems

shall

be

considered,

designed

and

installed

in

accordance

with

CEA

rules.

4.2 Compartmentation and separation

4.2.1 Compartmentation

between

a

sprinkler

protected

area

and

a

non-protected

area

shall

be

in

accordance

with

national

regulations.

Compartmentation

and

separation

between

combustible

materials

stored

in

the

open

air

and

in

sprinklered

buildings

shall

be

in

accordance

with

national

regulations.

4.2.2

When

there

are

no

national

regulations,

the

following

should

be

applied.

NOTE

1:

for

a

single

owner

or

occupier,

the

separation

between

combustible

materials

stored

in

open

air

and

the

sprinklered

building

should

be

not

less

than

10m

or

1,5

times

the

height

of

the

stored material,

whichever

is

the

greater.

NOTE

2:

the

separation

between

a

sprinkler

protected

area

and

a

non-protected

area

should

be

at

least

60

minutes

fire

resistant

and

constructed

of

non-combustible

materials.

NOTE

3:

sprinkler

protection

should

be

provided

in

any

adjacent

building

which

is

within

10m

of

the

protected

building

and

constitutes

an

exposure

hazard.

5 Classification of occupancies and fire hazards

5.1 General

The

hazard

class

to

which

the

sprinkler

system

is

to

be

designed

shall

be

determined

before

the

design

work

is

begun.

The

buildings

and

areas

to

be

protected

by

automatic

sprinkler

systems

shall

be

classified

as

Light

Hazard,

Ordinary

Hazard

or

High

Hazard.

This

classification

depends

on

the

occupancy

and

the

fire

load

and

shall

be

in

accordance

with

Annex

A.

5.2 Hazard classes

Buildings

or

areas

to

be

protected

which

contain

one

or

more

of

the

following

occupancies

and

fire

hazards

shall

be

classified

as

belonging

to

one

of

the

following

hazard

classes:

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