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Scaffold CouplersGeneral Technical and Application Manual

BoralKnow How

Formwork &Scaffolding

ACROW CYCLONE


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2 Scaffold Couplers

IntroductionScaffold couplers are essentially the fundamental component that is used to assemble tube-and-coupler

scaffolding as encompassed by AS1576. Tube-and-coupler scaffolding is dened in AS1576.3 as 'a scaffold in

which individual circular tubes serving as standards, braces or ties are joined together by means of purpose

designed couplers'.

This basic tting that is designed to join two scaffold tubes can be used to create a diverse range of scaffolding

structures or used as an accessory to prefabricated scaffolding systems.

This manual includes basic types of scaffold couplers which join two tubes together as well as special couplers

used to connect scaffold tube to other components, equipment or structures.

Important

The technical and application guidelines contained in this booklet are recommended methods to be used with

scaffold couplers supplied by Boral Formwork & Scaffolding Pty Ltd.

Recommendations and technical details must be accurately followed to obtain the correct performance of the

product. Deviation from the recommended usage will require a separate engineering design and/or verication

by the Boral Formwork & Scaffolding Engineering Department.

The use and application of scaffold couplers must be in compliance with the requirements of Statutory

Regulations and Australian Standards for Scaffolding (AS/NZS1576 'Scaffolding' and AS/NZS 4576 'Guidelines

for Scaffolding') as applicable.

The illustrations of the assembly congurations are guidelines only.

Site specic Hazard and Risk assessments may need to be generated for specic projects.

As part of the risk management processes, we draw your attention to the requirement that scaffolders must, as

part of their competency, be competent in manual lifting techniques. Therefore, scaffolders erecting, altering

or dismantling scaffolding must follow the manual handling guidelines published by Regulatory Authorities orother guidelines and codes of practice recognised as being acceptable by such Regulatory Authorities.

Personnel who erect, alter or dismantle scaffolding over 4m in height must hold a current National, State or

Territory Certicate in Scaffolding to the appropriate class.

Working Load Limits

Working Load Limits (WLLs) are given for couplers that are covered by AS1576.2 and comply to that standard.

WLLs for couplers shown may be limited by components to which they are attached. Hence, load capacity of

such components must be checked for suitability to support resultant loads.

Product Codes

The product codes shown on the following pages are sales codes.

To determine the hire code for the product remove the Z prex.

Example: Sale code for Double Coupler is ZDC

Hire code for Double Coupler is DC.

Disclaimer1 Photographs/illustrations shown within this brochure are intended as expressing the diversity and possible applications of the product and as

such must not be used as assembly instructions.

2 In line with Boral Formwork & Scaffoldings commitment to continuous product development and improvement, the information contained inthis brochure may be changed without notice.

3 Every effort has been made to give appropriate guidelines for the use of this product, however, Boral Formwork & Scaffolding Pty Ltd acceptsno responsibility for any loss or damage suffered by any person acting or refraining from action as a result of this information.

Should the users require any further information or guidance, they are encouraged to contact their local Boral Formwork & Scaffolding outlet.


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3General Technical and Application Manual

Product DescriptionCode

Mass

Number Kg

ZDC 1.05Double Coupler

Joins two scaffold tubes having outside

diameter of 48.3mm at right angles.

Tightening nuts suit standard Scaffold Spanner

(23mm A/F).

Replaceable 'T' bolts, nuts and washers.

Robust design made from drop forged steel for

durability and reliability.

Hot dip galvanised nish for corrosion resistance.

Complies with the requirements of AS1576.2.

Typical working load limit of 6.25kN against slip

at tightening torque of 54 Nm.

Can be used to resist tension or compression loads.

Swivel Coupler

Joins scaffold tube having outside diameter of

48.3mm at any angle.

Each half of the Coupler is interconnected with

a swivel pin.

Typically used for connecting bracing members.

Also used for tension splicing of scaffold tubes.

Tightening nuts suit standard Scaffold Spanner

(23mm A/F).

Replaceable 'T' bolts, nuts and washers. Robust design made from drop forged steel for

durability and reliability.

Hot dip galvanised nish for corrosion resistance.

Complies with the requirements of AS1576.2.

WLL = 6.25 kN against slip at tightening torque

of 54 Nm.

Can be used to resist tension or compression

loads in bracing.

Should not be used to support primary members.

(Refer Clause 3.2.2 of AS1576.2-1991)

Reduction Double Coupler

Similar to Double Coupler except that itconnects 48 O.D. tube to 60 O.D.

Reduction Swivel Coupler

Similar to Swivel Coupler except that it connects

48 O.D. tube to 60 O.D.

ZSC 1.18

ZRDC 1.80

ZRSC 2.20


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4 Scaffold Couplers


Mass

Number Kg

ZEJCP 1.37Expanding Joint Pin

Joins 48 O.D. scaffold tube standards end to

end internally.

Fits inside scaffold tubes.

Expands to t internal diameter of scaffold tube

when bolt tightened.

Tightening bolt suits standard Scaffold Spanner

(23mm A/F).

Made from forged steel.

Hot dip galvanised nish.

Under compression loading this Joint Pin

is capable of taking the full capacity of the

scaffold tube.

Not to be used for tension loads. Under tension

loading, it is necessary to splice the joint with

another scaffold tube and Swivel Couplers

(tension load check required).

Not to be used for end to end joining of tube

ledgers.

(Refer Clause 3.2.2 of AS/NZS1576.6-2000).

This Joint Pin must only be used to join

scaffold tube with the same internal diameter,

ie, the same wall thickness.

Typical scaffold tube sizes are: 48.3mm O.D. x 40.3mm I.D. (4.00mm wall

thickness tube) or

48.3mm O.D. x 38.5mm I.D. (4.88mm wall

thickness tube).

External Sleeve Coupler

Joins 48 O.D. scaffold tubes end to end

externally.

Used for end to end joining of scaffold tube

standards.

Locates on outside diameter of scaffold tube

members.

Tightening bolt suits standard Scaffold Spanner.

Made from high quality pressed steel. Hot dip galvanised nish.

Under compression loading this Coupler

is capable of taking the full capacity of the

scaffold tube.

Not to be used for tension loads. Under tension

loading, it is necessary to splice the joint with

another scaffold tube and Swivel Couplers

(tension load check required).

Can be used for end to end joining of tube

ledgers.

(Refer Clause 3.2.2 of AS/NZS1576.6-2000).

This Coupler must only be used to join scaffold

tube with the same external diameter. Typical scaffold tube sizes are:


thickness tube) or


thickness tube).

ZESCG 1.20


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Mass

Number Kg

Putlog Coupler(Standard Double Flap Type)

Joins 48 O.D. scaffold tubes at right angles. Used for xing putlog tubes onto ledger tubes. Tightening nut suits standard Scaffold Spanner

(23mm A/F). Replaceable 'T' bolt, nut and washer. Pressed steel aps and drop forged steel cap. Hot dip galvanised nish for corrosion

resistance.

Complies with the requirements of AS1576.2. Typically used for securing guardrails and

midrails at right angles to standards. Other usescan distort the coupler so that tube retention isnot effective and WLL does not apply.

Not to be used for connecting putlog tubes to

ledger tube in tube-and-coupler scaffolding.Only use Right Angle Couplers for this purpose.

Refer AS/NZS1576.6 for guidance on tube-and-coupler scaffolding.

WLL = 0.62 kN against slip of tube through apsof coupler at tightening torque of 54 Nm.

Putlog Coupler - Wrapover

(Standard Wrapover single type) Joins 48 O.D. scaffold tubes at right angles. Used for positioning putlog tubes onto ledger

tubes.

Tightening nut suits standard Scaffold Spanner(23mm A/F).

Replaceable 'T' bolt, nut and washer. Pressed steel body and drop forged steel cap. Hot dip galvanised nish for corrosion

resistance. Complies with the requirements of AS1576.2. Typically used for securing guardrails and

midrails to standards at right angles.Other uses can distort the Coupler so that tube

retention is not effective and WLL does not apply. Not to be used for connecting putlog tubes to

ledger tube. Only use Right Angle Couplers forsuch purpose.

Refer AS/NZS1576.6 for guidance on tube-and-

coupler scaffolding. WLL = 0.62 kN against slip of tube through aps

of coupler at tightening torque of 54 Nm.

Putlog Coupler - Hook Type

Joins 48 O.D. scaffold tubes at right angles.Not recommended for xing of putlog tubes to

ledger tubes for working decks.

Putlog HeadUsed for single pole putlog scaffolding.Fits 48 O.D. scaffold tube.WLL = 6.25 kN (resistance to tube slip where nuts

tightened to 54 Nm torque).

WLL = 2.25 kN (bending of blade).

ZPC 1.0

ZPCSW 0.7

ZPCHT 0.4

ZPH 1.23

Putlog Coupler - Hook Type

Putlog Coupler - Wrapover

Putlog Coupler

Putlog Head


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6 Scaffold Couplers


Mass

Number Kg

RSJ Clamp N2

RSJC2Hire Only

1.07

RSJ Clamp N3

RSJC3Hire Only

1.20

RSJ Clamp N1

RSJC1Hire Only

1.05RSJ Clamps

Joins 48 O.D. scaffold tube to Tapered or Parallel

Flange steel beams at 900.

Size 1 suitable for RSJ ange thickness up to 19mm.

Size 2 suitable for RSJ ange thickness of 19-38mm.

Size 3 suitable for RSJ ange thickness of 38-57mm.

Note:

RSJ Clamps must be used in pairs each side of

the ange. Minimum tightening torque = 54 Nm.

WLL =15.0 kN

RSJ Girder Clamp

WLL = 6.25kNResistance to slip alongtube or along flange of beam

SteelBeam

48 O.D. scaffold tube

48 O.D.scaffold tube

Gravlock Girder Clamp


Flange steel beams at 900.

Suitable for girder ange thickness up to 44mm.

ZGGC 1.50

Note:

Gravlock Girder Clamps must be used in pairs

each side of the ange.

Minimum tightening torque = 54 Nm.

WLL = 6.25kNResistance to slip alongtube or along flange of beam

48 O.D.scaffold

tube

WLL =15.0 kN 48 O.D. scaffold tube

SteelBeam

GravlockGirder Clamp

Note:

RSJ Swivel Clamps must be used in pairs each

side of the ange.

Minimum tightening torque = 54 Nm.

RSJ Swivel Clamp


Flange steel beams at various angles.

Suitable for girder ange thickness up to 44mm.

RSJSCHire Only

1.45

WLL =

15.0 kN

WLL = 6.25kNResistance to slip along

tube or along flange of beam

SteelBeam

48 O.D. scaffold tube

48 O.D.scaffold

tube

RSJ Swivel Clamp


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Mass

Number Kg

Board Clamp

Retains timber scaffold planks to 48 O.D. putlog/

transom tubes.

Suitable for plank thickness range of 35 to 38mm.

Rafter Coupler

Used for clamping scaffold tube to timber runners.Suitable for timbers 50mm wide.

Wall Tie Bracket

Wall Tie Brackets are an alternative tying method

and they are used where it is not possible or

convenient to tie through windows or around

columns.

Wall Tie Brackets supplied by BF&S comprise a

half Swivel Coupler attached to an angle section

with a pin allowing it to rotate. The angle section

contains an 18mm dia hole for a 16mm dia

fastener or anchor for securing the bracket to the

face of a building wall or similar structure. The

swivel pin attachment enables the Half Coupler to

rotate through 3600.

Notes:

The load capacity of the selected anchor and

the structure to which the bracket is attached

must be veried as having suitable capacity to

sustain the Working Load Limit of the bracket.

When determining anchor forces, prying forces

must be considered where they may occur.

Stated WLL is applicable where the following

types of Swivel Coupler is used:

- Boral/Euro

- Boral/Burtons

- Boral/SGB

- Acrow. Australian Standards for Scaffolding provide

guidance on Anchorage and Tie Assemblies.

In particular refer to Clause 2.8 of AS1576.1 and

Clause 8.5 of AS4576.

ZSBCP 0.60

RC

Hire Only

1.5

ZWTB 2.0

Suitable anchorto structure

WLL = 6.25kN


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NEW SOUTH WALES

Email: [email protected]

SYDNEY (REVESBY)Telephone (02) 9780 6577Facsimile (02) 9780 6499

BROOKVALETelephone (02) 9905 1142Facsimile (02) 9905 1109

COFFS HARBOUR

Telephone (02) 6653 1390Facsimile (02) 6658 2377

NEWCASTLETelephone (02) 4961 4315Facsimile (02) 4961 5582

NORTH WYONGTelephone (02) 4352 2272Facsimile (02) 4351 5115

ORANGETelephone (02) 6362 4195Facsimile (02) 6361 3215

PORT MACQUARIETelephone (02) 6581 0366

Facsimile (02) 6581 2488TAMWORTHTelephone (02) 6765 7474Facsimile (02) 6765 2704

WOLLONGONGTelephone (02) 4227 3211Facsimile (02) 4227 1114

CANBERRA ACT


CANBERRATelephone (02) 6260 2558Facsimile (02) 6260 2559

VICTORIA


MELBOURNE


TRARALGONTelephone (03) 5174 5616Facsimile (03) 5174 8522

TASMANIA


HOBARTTelephone (03) 6272 6775Facsimile (03) 6272 3647

LAUNCESTONTelephone (03) 6334 5484

Facsimile (03) 6334 5494

QUEENSLAND


BRISBANETelephone (07) 3265 2266Facsimile (07) 3865 0277

CAIRNSTelephone (07) 4035 4886Facsimile (07) 4035 4870

GLADSTONE


GOLD COASTTelephone (07) 5593 5850Facsimile (07) 5593 4203

MACKAYTelephone (07) 4952 2204Facsimile (07) 4952 2938

MAROOCHYDORETelephone (07) 5445 3233Facsimile (07) 5445 3099

ROCKHAMPTONTelephone (07) 4928 3666

Facsimile (07) 4926 1590TOOWOOMBATelephone (07) 4632 1536Facsimile (07) 4639 3764

TOWNSVILLETelephone (07) 4779 3255Facsimile (07) 4725 1119

SOUTH AUSTRALIA


ADELAIDETelephone (08) 8359 1033Facsimile (08) 8359 1366

NORTHERN TERRITORY


DARWIN


WESTERN AUSTRALIA


PERTHTelephone (08) 9302 8900Facsimile (08) 9302 1744

KALGOORLIETelephone (08) 9021 8642Facsimile (08) 9021 5220

KARRATHATelephone (08) 9144 1010Facsimile (08) 9144 1709

KWINANATelephone (08) 9419 7806Facsimile (08) 9419 4024

Your local contact from our national network of branches

BORAL FORMWORK &SCAFFOLDING PTY LTDACN 004 284 806ABN 35 004 284 806

National Head Ofce:2A Mavis StreetRevesby NSW 2212Telephone: (02) 9780 6555Facsimile: (02) 9780 6444Email: [email protected]: www.boral.com.au

Formwork &Scaffolding

ACROW CYCLONE

Broch 031 Mar 03

BoralKnow How

00713 scaffoldcouplers14

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