CEA 4001 - Special Requirements for the Protection of Mobile Shelving with Ceiling or Roof-Level Sprinkler Only

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163

NOTE

1:

containers

shall

be

assumed

to

be

water

permeable

if

the

head

of

water

collected

in

the

container does

not

exceed

10

mm

for

a

water

discharge

into

the

container,

equivalent

to

20

mm/min.

(

Storage

containers

with

5

mm

diameter

drainage

holes

uniformly

distributed

at

not

less

than

50 holes/m

2

of

container

plan

area,

may

satisfy

the

above

water

permeability

requirements). Consideration

shall

be

given

to

the

influence

of

the

stored

goods

and

any

packaging

materials

on water

permeability.

The

maximum

horizontal

distance

of

the

sprinklers

in

intermediate

levels

for

category

HHS

4

shall

not

exceed

1,5

m

and

2,5m

for

category

HHS3.

Sprinklers

shall

have

the

sensitivity

rating

"Special"

at

the

ceiling

and

"Special"

or

"Quick"

in

intermediate

levels.

The

maximum

storage

height

for

racks

without

intermediate

sprinklers

shall

not

exceed

2,1m

for

HHS

3

and

1,2

m

for

HHS

4.

K.7.2 Storage methods ST1 - free or block standing - ST2 and ST3 - post pallet storage

The

maximum

storage

height

shall

not

exceed

3

m.

Only

non-combustible

pallets

with

closed

surface

like

steel

pallets

shall

be

used.

The

storage

height

on

each pallet

shall

not

exceed

1

m.

The

top

storage

containers

on

the

pallet

shall

be

closed

with

a

lid.

The

sprinklers

shall

have

the

sensitivity

rating

"Special".

Film-forming

foam

and

wetting

agents

shall

be

added

to

the

water

of

the

sprinkler

system.

NOTE:

if

other

sprinkler

protection

concepts

are

demonstrated

by

appropriate

fire

tests

as

adequate protection

the

above

requirements

can

be

adapted.

K

K.8 Special requirements for the protection of mobile shelving with ceiling or roof-level sprinkler only

This

annex

includes

mobile

shelving

with

the

top

open

or

closed.

Perforated

tops

are

preferred.

Only

Category

I

or

II

products

shall

be

stored

in

mobile

shelving.

The

height

of

the

mobile

shelving

protected

by

ceiling

or

roof-level

sprinkler

only

shall

be

limited

to

3m.

The

clearance

between

the

top

of

the

mobile

shelving

units

and

the

sprinkler

deflectors

shall

not

be

less

than

0,5m.

The

area

of

each

block

of

closed

(compressed)

mobile

shelving

shall

not

exceed

150m².

There

shall

be

aisles

of

at

least

1,2m

surrounding

each

block

of

mobile

shelving

in

either

the

closed

or

open

(uncompressed)

condition.

When

the

mobile

shelves

are

closed

(compressed),

each

shelf

unit

shall

close

against

hard

tops,

which

shall maintain

a

space

of

at

least

50mm

between

adjacent

shell

units.

The

water

density

at

the

ceiling

protection

shall

be

in

accordance

with

the

specification

(see

clause

6)

with

a minimum

of

10

mm/min.

For

rooms

with

a

floor

area

less

than

150

m²

the

following

density

shall

be

applied:

Maximum

room

height

(m)

Density

(mm/min)

3

7,5

2,6

5

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