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AS 2118.9-1995 AUTOMATIC FIRE SPRINKLER SYSTEMS - PIPING SUPPORT AND INSTALLATION

AS 2118.9-1995 AUTOMATIC FIRE SPRINKLER SYSTEMS - PIPING SUPPORT AND INSTALLATION

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This Australian Standard was prepared by Committee FP/4, Standard Sprinkler
Installations. It was approved on behalf of the Council of Standards Australia on
13 March 1995 and published on 5 July 1995.

The following interests are represented on Committee FP/4:
Australian Building Codes Board
Australian Chamber of Commerce and Industry
Australian Chamber of Manufactures
Australian Construction Services, Department of Administrative Services
Australian Fire Authorities Council
Australian Fire Protection Association
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Australian Water and Sewerage Authorities
Commonwealth Fire Board
CSIRO—Division of Building, Construction and Engineering
Fire Protection Industry Association of Australia
Institution of Engineers Australia
Insurance Council of Australia
Master Plumbers and Mechanical Services Association of Victoria
Melbourne Water
New Zealand Fire Equipment Association
Telecom Australia
The Association of Consulting Engineers Australia.

Review of Australian Standards. To keep abreast of progress in industry, Australi an Standards are subject
to periodic review and are kept up to date by the issue of amendments or new editi ons as necessary. It is
important therefore that Standards users ensure that they are in possession of the latest editi on, and any
amendments thereto.
Full detail s of all Australi an Standards and related publications will be found in the Standards Australi a
Catalogue of Publications; this information is supplemented each month by the magazine ‘The Australian
Standard’, which subscribing members receive, and which gives detail s of new publi cati ons, new edit ions
and amendments, and of withdrawn Standards.
Suggesti ons for improvements to Australian Standards, addressed to the head offi ce of Standards Australia,
are welcomed. Noti fi cati on of any inaccuracy or ambiguity found in an Australian Standard should be made
without delay in order that the matter may be investigated and appropriate action taken.

AS 2118.9—1995

Australian Standard

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Automatic fire sprinkler systems
Part 9: Piping support and
installation

PUBLISHED BY STANDARDS AUSTRALIA
(STANDARDS ASSOCIATION OF AUSTRALIA)
1 THE CRESCENT, HOMEBUSH, NSW 2140
ISBN 0 7262 9756 9

AS 2118.9 — 1995

2

PREFACE
This Australian Standard was prepared by the Joint Standards Australia/Standards New
Zealand Committee on Automatic Sprinkler Installations, to supersede in part
AS 2118 —1988, SAA Code for Automatic Fire Sprinkler Systems.
This Standard is the result of a consensus among representatives on the joint committee to
produce it as an Australian Standard.
The revisions to AS 2118 include Standards Australia’s requirements to keep product and
installation Standards separate. When complete the series will comprise:

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AS
2118

4118

Automatic fire sprinkler systems
Part 1:
Standard
Part 2:
Wall wetting sprinklers (Drenchers)
Part 3:
Deluge
Part 4:
Residential
Part 5:
Domestic
Part 6:
Combined sprinkler and hydrant
Part 9:
Piping support and installation
Part 10: Approval documentation
Fire
Part
Part
Part
Part
Part
Part
Part
Part
Part

sprinkler systems
1.1: Components — Sprinklers and sprayers
1.2: Components — Alarm valves (wet)
1.3: Components — Water motor alarms
1.4: Components — Valve monitors
1.5: Components — Deluge and pre-action valves
1.6: Components — Stop valves and non-return valves
1.7: Components — Alarm valves (dry)
1.8: Components — Pressure reducing valves
1.9: Components — Accelerators and exhausters

Part 2.1: Piping — General

Originated as part of AS CA16 — 1939 (endorsement
of Seventh Edit ion of FOC Rules).
Previous editi on AS 2118 — 1982.
Revised and redesignated in part as AS 2118.9— 1995.

 Copyri ght STANDARDS AUSTRALIA
Users of Standards are reminded that copyright subsists in all Standards Austr alia publi cati ons and software. Except where the
Copyri ght Act all ows and except where provided for below no publi cati ons or software produced by Standards Austr alia may be
reproduced, stored in a retr ieval system in any form or transmitt ed by any means without prior permission in writ ing from
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on commercial software royalt ies should be directed to the head offi ce of Standards Austr alia.
Standards Austr alia wil l permit up to 10 percent of the technical content pages of a Standard to be copied for use
exclusively in-house by purchasers of the Standard without payment of a royalty or advice to Standards Austr alia.
Standards Austr alia wil l also permit the inclusion of it s copyright material in computer soft ware programs for no royalt y
payment provided such programs are used exclusively in-house by the creators of the programs.
Care should be taken to ensure that materi al used is fr om the curr ent edit ion of the Standard and that it is updated whenever the
Standard is amended or revised. The number and date of the Standard should therefore be clearly identif ied.
The use of materi al in print form or in computer software programs to be used commercially, with or without payment, or in
commercial contracts is subject to the payment of a royalty. This policy may be vari ed by Standards Austr alia at any ti me.

3

AS 2118.9 — 1995

CONTENTS
Page
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 NEW DESIGNS AND INNOVATIONS . . .
1.3 REFERENCED DOCUMENTS . . . . . . . . .
1.4 DEFINITIONS . . . . . . . . . . . . . . . . . . . . .

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SECTION 2 SUPPORT OF SPRINKLER PIPING
2.1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 DESIGN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 CORROSION PROTECTION OF PIPE SUPPORTS . . . . . . .
2.4 REQUIREMENTS FOR PIPE SUPPORT COMPONENTS . . .
2.5 FIXING OF PIPE SUPPORTS . . . . . . . . . . . . . . . . . . . . . . .
2.6 SPACING OF SUPPORTS . . . . . . . . . . . . . . . . . . . . . . . . .
2.7 LOCATION OF SUPPORTS . . . . . . . . . . . . . . . . . . . . . . . .
2.8 VERIFICATION OF DESIGN . . . . . . . . . . . . . . . . . . . . . . .

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SECTION 3 INSTALLATION — GENERAL
3.1 PIPE AND PIPE FITTING SPECIFICATIONS . . . . . . . . . . . . . . . . .
3.2 HYDRAULIC TEST PRESSURE . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 EMBEDDING OF PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 CORROSION PROTECTION OF PIPING . . . . . . . . . . . . . . . . . . . .
3.5 PROTECTION OF PIPING AGAINST MECHANICAL DAMAGE . . .
3.6 FACILITIES FOR FLUSHING PIPING . . . . . . . . . . . . . . . . . . . . . .
3.7 PROHIBITED USE OF PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.8 SLOPE OF PIPES FOR DRAINAGE . . . . . . . . . . . . . . . . . . . . . . . .
3.9 LOW LEVEL DRAINAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.10 PIPE SIZES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.11 SPACING OF BRACKETS AND CLIPS . . . . . . . . . . . . . . . . . . . . .

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SECTION 4 INSTALLATION—STEEL PIPING
4.1 PIPE AND PIPE FITTING SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . 16
4.2 PIPE JOINTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
SECTION 5 INSTALLATION—LIGHTWALL STEEL PIPING
5.1 PIPE AND PIPE FITTING SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . 17
5.2 PIPE JOINTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
SECTION 6 INSTALLATION—COPPER PIPING
6.1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.2 PIPE JOINTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.3 PIPE BENDING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
SECTION 7 INSTALLATION—PLASTIC PIPING
7.1 PIPE AND PIPE FITTING SPECIFICATION . . . . .
7.2 PIPE AND FITTINGS—JOINTING . . . . . . . . . . . .
7.3 CORROSION PROTECTION OF PIPING . . . . . . .
7.4 PIPE SIZES . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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AS 2118.9 — 1995

4

STANDARDS AUSTRALIA
Australian Standard
Automatic fire sprinkler systems
Part 9: Piping support and installation
S E C T I O N

1

S CO P E

A N D

G E NE R A L

1.1 SCOPE This Standard specifies requirements for the support and installation of
piping for fire sprinkler systems.

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1.2 NEW DESIGNS AND INNOVATIONS Any alternative materials, designs,
methods of assembly, and procedures that do not comply with specific requirements of
this Standard, or are not mentioned in it, but that give equivalent results to those specified
are not necessarily prohibited. The specified approval remains the prerogative of the
regulatory authority.
1.3 REFERENCED DOCUMENTS The following documents are referred to in this
Standard:
AS
1074

Steel tubes and tubulars for ordinary service

1167

Welding and brazing— Filler metals

1281

Cement mortar lining of steel pipes and fittings

1432

Copper tubes for plumbing, gasfitting and drainage applications

1516

The cement mortar lining of pipelines in situ

1530
1530.4

Methods of fire tests on building materials, components and structures
Part 4: Fire-resistance test of elements of building construction

1538

Cold-formed Steel Structures Code

1579

Arc welded steel pipes and fittings for water and gas

1650

Hot-dipped galvanized coatings on ferrous articles

1674

Safety in welding and allied processes

1834
1834.1
1834.2

Material for soldering
Part 1: Solder alloys
Part 2: Flux-cored solders

1873
1873.1
1873.3
1873.4

Powder-actuated (PA) hand-held fastening tools
Part 1: Selection, operation and maintenance
Part 3: Charges
Part 4: Fasteners

2118
2118.1
2118.4
2118.5

Automatic fire sprinkler systems
Part 1: Standard
Part 4: Residential
Part 5: Domestic

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AS 2118.9 — 1995

AS
2484
2484.1
2484.2

Fire— Glossary of terms
Part 1: Fire tests
Part 2: Fire protection and firefighting equipment

2544

Grey iron pressure pipes and fittings

3500
3500.0
3500.1

National Plumbing and Drainage Code
Part 0: Glossary of terms
Part 1: Water supply

3688

Water supply— Copper and copper alloy body compression and capillary
fittings and threaded end connectors

4041

Pressure piping

4118
4118.2.1

Fire sprinkler systems
Part 2.1: Piping — General

1.4 DEFINITIONS For the purpose of this Standard, the definitions given in
AS 2118.1, AS 2484.1, AS 2484.2, AS 3500.0 and those below, apply.

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1.4.1 Lightwall pipe — a mild steel pipe with a nominal wall thickness less than that of
medium wall thickness as specified in AS 1074.
1.4.2 Pressed locked fitting— a formed steel pipe fitting designed to ensure water
tightness by means of synthetic, rubber ‘o-ring’ seals. Mechanical compression of the
entire circumference of the fitting against the pipe forms a permanent engagement of the
pipe and fitting.
1.4.3 Regulatory authority — a Minister of the Crown, a government department, or
other public authority having power to issue regulations, order, or other instructions in
respect of any subject covered by this Standard.
1.4.4 Roll grooved fitting— a formed ductile iron cast fitting designed to ensure
watertightness by means of synthetic rubber gaskets. The fitting housing is in two sections
and fully encloses the gasket when assembled. The housing engages around the full
circumference of the roll grooved pipe end and is assembled using nuts and bolts ensuring
engagement of the pipe and fitting.
1.4.5 Slotted key locked fittings— a formed ductile iron cast fitting designed to ensure
watertightness by means of synthetic rubber ‘o-ring’ seals. The pipe when inserted into
the fitting is mechanically held in place by a locking key. The locking key, when driven
through the slotted keyway fitting, deforms the pipe surface. The locking key can be
removed to demount and re-assemble the fitting.

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AS 2118.9 — 1995

6

S E C T I O N

2

S UP P O R T O F
P I P I N G

S P R I N K L E R

2.1 GENERAL When a pipe support system is being designed for a fire sprinkler
system, consideration shall be given to the correct location of pipe supports and to—
(a)

the stresses and loads which may be imposed on the support system from all
external causes including differential movement of the building structure and all
internal causes including pressure reactions;

(b)

the transmission of vibration from the building to the piping and from the piping to
the building;

(c)

the effect a corrosive atmosphere may have on the materials used; and

(d)

the isolation of the pipe from the support when unlike materials are used.

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2.2 DESIGN
requirements:

Pipe supports shall comply with one or more of the following

(a)

They shall be designed, in accordance with AS 1538 or an equivalent Standard, to
support twice the load due to water-filled piping plus a load of 115 kg at each point
of support.

(b)

They shall comply with the requirements of Clause 2.4.

(c)

For domestic sprinkler installation they shall comply with the requirements of
AS 3500.1.

(d)

They shall be capable of supporting the appropriate test load shown in Table 2.8.1.

2.3 CORROSION PROTECTION OF PIPE SUPPORTS Sprinkler piping supports
installed in an aggressive environment shall be suitably protected against corrosion.
NOTE: In bleach, dye and textile print works, paper mills, tanneries and in other premises
where there are corrosive conditions, pipe supports should be thoroughly cleaned and protected
by suitable means, e.g. two coats of good quality, bituminous paint, one coat being applied
before and one after installation. Although this treatment will materially lengthen the effective
life of the pipes, it will probably be found necessary to renew the coatings from time to time at
intervals from one year to five years according to the severity of the conditions. As an
alternative to the above treatment, galvanized pipe supports may be used.

2.4
2.4.1

REQUIREMENTS FOR PIPE SUPPORT COMPONENTS (see Figure 2.4.1)
Hook bolts

The following requirements apply to the use of hook bolts:

(a)

Hook bolts shall be used for clamping down purposes only.

(b)

Hook bolts shall not be threaded along their full length.

(c)

Hook bolts shall not be used for piping exceeding 80 mm nominal internal diameter.

(d)

Hook bolts shall conform to the following dimensions:
millimetres
Nominal pipe size

Minimum nominal
diameter of material

≤50

8

>50 ≤80

10

NOTE: The arms of hook bolts shall be located on alternate sides along a length of pipe.
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2.4.2

AS 2118.9 — 1995

U-bolts clamping down Shall conform to the following dimensions:
millimetres
Nominal pipe size

Minimum nominal
diameter of material

≤50

2.4.3

6

>50 ≤150

10

>150 ≤250

12

>250 ≤350

15

U-bolts clamping up and rods

Shall conform to the following dimensions:
millimetres

Nominal pipe size

Minimum nominal
diameter of material

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≤50

2.4.4

U-hangers (clips)

6

>50 ≤150

12

>150 ≤250

15

>250 ≤350

20

Shall conform to the following dimensions:
millimetres
Nominal size of
material

Nominal pipe size
≤40

1.6 × 25

>40 ≤65

3 × 25

>65 ≤150

6 × 30

2.4.5 Cantilever type supports, saddle brackets, girder or beam clamps
designed in accordance with Clause 2.2(a).
2.4.6 Pipe bands
requirements—
(a)

Shall be fabricated from material complying with the following

for non-corrosive atmospheres as follows:
millimetres

(b)

Shall be

Nominal pipe size

Minimum material
thickness

≤100

1

>100

3

For corrosive atmospheres not less than 3 mm thick.

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AS 2118.9 — 1995

2.4.7

8

Pipe support beams (trapeze bar)

Pipe support beams shall—

(a)

be fabricated from material with section modulus equal to or greater than those
calculated from the sections detailed below; or

(b)

using mild steel angle, conform to the following dimensions:
millimetres
Nominal size of material
Nominal pipe size
Max. span 2 m

Max. span 3 m

≤40

40 × 40 × 6

65 × 40 × 6

>40 ≤65

65 × 40 × 6

75 × 50 × 6

>65 ≤150

100 × 65 × 8

100 × 75 × 8

NOTE: Where unequal angle is used, the longer arms shall be vertical.

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2.5

FIXING OF PIPE SUPPORTS

2.5.1 General Sprinkler piping may be supported from the building structure, provided
that the structure is capable of supporting the load. Where sprinklers are located below
ducts, the piping may be supported from the duct supports, provided that these have
sufficient strength to support the combined design load.
Sprinkler piping shall be supported independently of ceiling sheathing and any associated
suspension system.
2.5.2 Fixing to concrete, brick or masonry Wooden plugs or plugs of plastic material
shall not be used for fixing pipe supports to concrete, brick or masonry. Explosive
powered fasteners (see AS 1873), through-bolts, expanding metal fasteners, or bolts or
screws set in concrete may be used in this type of construction for fixing pipe supports.
The fixing shall be capable of supporting the design load as required in Clause 2.2(a).
2.5.3 Fixing to timber Acceptable methods of fixing to timber are wood screws, drive
screws, coach screws and coach bolts. Nails shall not be used for fixing pipe supports to
timber.
The following requirements shall apply:
(a)

Wood screws shall not be hammer driven.

(b)

Drive screws shall not be used for securing upwards.

(c)

Wood screws or drive screws shall not be used for fixing piping exceeding 50 mm
nominal diameter.

(d)

The fixing shall be capable of supporting the design load specified in Clause 2.2(a).

(e)

Coach bolts and coach screws shall conform to the following minimum dimensions:
millimetres
Nominal diameter of
coach bolt or coach screw

Nominal length of
coach screw

6

50

>50 ≤150

12

75

>150 ≤200

15

75

Nominal pipe size
≤50

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9

AS 2118.9 — 1995

2.5.4 Fixing to steel Explosive-powered fasteners may be used for fixing pipe supports
to steel provided that the steel is not less than 5 mm thick. The fixing shall be capable of
supporting the design load as required in Clause 2.2(a).
2.6 SPACING OF SUPPORTS The distance between supports for horizontal and
vertical sprinkler piping shall be in accordance with Table 2.6.1.
In certain types of construction, in which the minimum spacing required cannot be
achieved by supporting pipes from main structural members, provision shall be made to
support the centre of the span. A typical method is shown in Figure 2.5.1.
TABLE

2.6.1

MAXIMUM SPACING OF PIPE SUPPORTS
Maximum spacing of brackets and clips, m

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Nominal pipe size
(DN)

2.7

Plastic

Copper and
lightwall steel

Galvanized steel
and ductile iron

Horizontal

Vertical

20
22
25

1.50

2.00

4.00

4.00

0.70
0.70
0.75

1.40
1.40
1.50

32
40
50

2.50
2.50
3.00

5.00
5.00
5.00

0.85
0.90
1.05

1.70
1.80
2.10

63
65
75


3.00



5.00


1.10
1.20
1.30

2.20
2.40
2.60

80
90
100

4.00
4.00
4.00

5.00
5.00
5.00

1.35
1.40
1.50

2.70
2.80
3.00

110
125
140
≥150


4.00

4.00


6.00

6.00

1.50
1.70
1.70
2.00

3.00
3.40
3.40
4.00

LOCATION OF SUPPORTS

2.7.1 General Pipe supports shall be located such that they do not obstruct the
distribution of water from any sprinkler head.
2.7.2 Change of direction A support shall be located not further than 1 m from any
change of direction in the piping, e.g. bend or elbow.
2.7.3 Range pipes Range pipes exceeding 500 mm in length shall have at least one
support. The first support on any range pipe shall be not more than 2 m from the
distribution pipe or riser (drop). The distance from the last support to the end of a range
pipe shall not exceed the following:
(a)

For pipes ≤25 mm nominal diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 m

(b)

For pipes >25 mm nominal diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 m

2.7.4 Distribution pipes The first support on any distribution pipe shall be not more
than 2 m from the connection to the main distribution pipe. The distance from the last
support to the end of any distribution pipe shall not exceed 1 m.
2.7.5 Main distribution pipes The distance from the last support to the end of any
horizontal main distribution pipe shall not exceed 1 m.
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AS 2118.9 — 1995

10

2.7.6 Risers Main vertical pipes rising (or dropping) from the installation valves, or
for linking the piping between levels, shall be supported directly from the structure or by
supports on horizontal branch piping from the riser not more than 300 mm from the riser.
2.8

VERIFICATION OF DESIGN

2.8.1 General Supports which comply with Clause 2.2(b) shall be deemed to meet the
requirements for sprinkler piping support systems.
NOTE: Where the support system is designed in accordance with Clause 2.2(a), details of the
pipe supports proposed may be required by the regulatory authority for approval. Where details
submitted are considered to be inadequate, the regulatory authority may require a verification
test, as specified in Clause 2.8.2.

2.8.2 Verification test Where a verification test is required, pipe supports shall be
capable of withstanding the following test without failure.
The appropriate load from Table 2.8.1 shall be applied without shock for a period not less
than 30 s.
NOTE: This test is not intended for application in situ. If applied in situ, appropriate safety
precautions must be taken.

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TABLE

2.8.1

VERIFICATION TEST LOADS
Pipe size
mm

Test load (nominal)
kg

≤50

340

>50 ≤65

385

>65 ≤80

475

>80 ≤100

680

>100 ≤150

1200

>150

1750

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