CEA 4001 - Clothes in Multiple Garment Hanging Storage

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158

K.2 Clothes in multiple garment hanging storage

K.2.1 General

This

annex

describes

special

provisions

for

the

protection

of

intensive

hanging

garment

stores

having multiple

row

or

garment

racks

at

two

or

more

levels.

They

may

have

automatic

or

semi-

automatic

garment delivery,

picking

or

transportation

systems.

Access

to

elevated

garment

storage

levels

within

a

warehouse

is usually

by

walkways

and

ramps.

A

common

feature

of

hanging

garment

storage

is

that

there

is

no

fire separation

between

the

decks.

Walkways,

aisles,

ramps

and

garment

racks

create

a

significant

obstruction

to ceiling

level

sprinkler

protection.

Protection

of

hanging

garments

stored

in

carousels

or

vertical

blocks without

aisles

is

beyond

the

scope

of

this

annex.

K.2.2 Categorization

This

annex

applies

to

all

types

of

garments,

irrespective

of

their

storage

category.

K.2.3 Sprinkler protection

Each

garment

rack

shall

be

limited

to

two

rows

of

hanging

garments

(side

by

side)

and

a

storage

height

of

3,5m

between

intermediate

levels

of

sprinklers.

Each

rack

shall

be

separated

by

an

aisle

of

at

least

0,8m width.

The

garment

racks

shall

be

protected

by

a

single

row

of

sprinklers.

The

spacing

between

the

sprinkler rows

shall

not

exceed

3,0m.

The

sprinklers

installed

directly

above

the

garment

racks

shall

be

stagger

spaced

in

the

vertical

plane,

at horizontal

intervals

of

not

more

than

2,8m

along

the

length

of

the

rack.

There

shall

be

a

sprinkler

not

more than

1,4m

from

the

rack

end.

The

clearance

between

the

top

of

the

garments

and

the

sprinkler

deflector

shall

be

at

least

0,

15m.

Each

sprinkler

row

protecting

garment

storage

racks

should

be

capped

by

a

continuous

solid

horizontal

baffle

of

at

least

the

length

and

width

of

the

garment

row.

The

baffle

should

preferably

be

of

a

non-

combustible material.

The

upper

level

of

sprinkler

rack

protection

and

baffle

may

be

omitted

providing

the

clearance

between

the top

of

the

garments

and

the

deflectors

of

the

ceiling

sprinklers

does

not

exceed

3m

height.

Sprinklers

shall

be

installed

below

all

access

ramps,

main

aisles,

walkways

and

transportation

routes,

with the

exception

of

aisles,

not

exceeding

1,2m

wide,

between

sprinkler

protected

garment

storage

rows.

K.2.4 Sprinklers in operation

The

number

of

rack

sprinklers

assumed

to

operate

shall

be

as

follows:

Rows

:

3

Levels

:

3

Sprinklers

per

row

3

:

3

Where

there

are

more

than

3

levels

of

sprinkler

protection,

3

rows

of

3

sprinklers

on

3

protected

levels

shall be

assumed

to

operate.

Where

there

are

3

levels

or

less,

3

rows

of

3

sprinklers

should

be

assumed

to

operate

on

all

protected

levels.

K.2.5 Ceiling sprinklers

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