Scaffolding

Neil Francis, ManagerNeil Francis, ManagerMobile:Mobile: 0419 592 4040419 592 404Freecall:Freecall: 1800 064 9661800 064 966

P.O. Box 1103, Moe Vic. 3825Fax: (03) 5126 3210

Email: [email protected]

ABN: 85 066 339 110

If you or your staff need a ticket, or refresher training,

we have the expertise and experience you need

Name

SAASSESSMENT INSTRUMENT

SCAFFOLDINGADVANCED

Advanced Scaffolding

ASSESSMENT

Part 1 Practical

Part 2 Assignment

Part 3 Knowledge

April 1994

National Occupational Health and Safety Certification Standardfor

Users and Operators of Industrial Equipment

ASSESSMENT INSTRUMENT

FOR THE

ADVANCED SCAFFOLDING

CERTIFICATE OF COMPETENCY

PART ONE

PRACTICAL SKILLS PERFORMANCE ASSESSMENT

(Tasks and Model Results)

Advanced Scaffolding Practical Skills

CONTENTS

Page

ASSESSOR GUIDELINES SPECIFICIntroductory notes 2Conditions 3Notes on individual sections 4

ASSESSMENT FORM 6

ATTACHMENTSAttachment A: Suggested scaffold design (with floor penetration) 7Attachment B: Suggested scaffold design (with supporting beams) 8Attachment C: Extracts from AS 2626 9Attachment D: FSWR fixing method 11

RELATIONSHIP TO THE NATIONAL CERTIFICATION STANDARD 12

Advanced Scaffolding Practical April 19942

Assessor guidelines specific

Introductory notes−−−−Practical

1 The Advanced Scaffolding Certificateencompasses the requirements for theBasic and Intermediate ScaffoldingCertificates. It is preferable that anapplicant for the Advanced ScaffoldingCertificate already holds a Basic andIntermediate Scaffolding Certificate or haspreviously passed a practical skillsassessment for the Basic andIntermediate Scaffolding Certificates. Otherwise the assessment for an applicantfor the Advanced Certificate mustincorporate the requirements of the Basic,Intermediate and Advanced Certificateassessment.

2 The practical skills performanceassessment is one of three assessmentswhich applicants must pass to qualify for aAdvanced Scaffolding Certificate ofCompetency. The other components area knowledge assessment and a writtenassignment.

3 The practical skills performanceassessment for Advanced Scaffolding is a`closed book' practical exercise coveringfive sections.

In practical skills performance assessmentthe certificate assessor evaluates theapplicant's applied knowledge andunderstanding and the applicant'sfamiliarity with scaffolding equipment andrecommended work procedures. Oncompletion of the assessment theassessor will determine whether theapplicant can safely undertake, withoutdirect supervision, the tasks encompassedwithin each of the four units ofcompetence comprising AdvancedScaffolding prescribed by Schedule A ofthe National Occupational Health andSafety Certification Standard for Usersand Operators of Industrial Equipment(NOHSC: 1006, 1992).

4 The relationship between the five sectionsof the performance assessment and theStandard's prescribed performance criteriaand range statements is set out on page 13.

A full assessment should be completedwithin two hours.

To pass the assessment, the applicant mustcomplete satisfactorily each of the followingsections:

Section 1: Use of safety harnessSection 2: Hung scaffold constructionSection 3: Hung scaffolding work

practicesSection 4: Fixing flexible steel wire ropeSection 5: Inspection of chains

5 An applicant who holds a Dogging orRigging Certificate, or who has previouslypassed a practical skills performanceassessment for Dogging, does not requireassessment in Section 5.

An applicant who holds a RiggingCertificate, or who has previously passed apractical skills performance assessment forBasic Rigging, does not require assessmentin Sections 1 and 4.

6 An applicant who produces a satisfactoryrecord of training (such as a log book)which establishes at least 25 working daysof experience in the erection anddismantling of tube-and-coupler hungscaffolds does not require assessment inSections 2 and 3.

7 An applicant undergoing re-assessmentneed only be re-assessed in those sectionsin which he or she previously failed.

8 Any other partial or full waiver ofassessment should only be permitted incompliance with guidelines, determinationsor advice given to certificate assessors bythe certifying authority.


Conditions

9 LocationThe practical skills assessment can beconducted at any location which has:

• adequate temporary or permanentoverhead supporting structure for thescaffold; and

• sufficient clear space for the scaffoldto be erected and dismantled.

10 Minimum scaffolding equipmentThe following should be used as a guideby the assessor. The actual quantities anddimensions may vary depending uponavailable stock and the nature andconfiguration of the available overheadsupporting structure.

Tubes(of uniform material complying withAS 1576.3, Suppl 1)

Design A Design B0.3 m x 6 x Nil0.6 m x 6 x 61.5 m x 8 x 111.8 m x 6 x Nil2.1 m x 2 x 22.4 m x 2 x 23.6 m x 8 x 103.9 m x 6 x 6

Random planks(225 mm wide and uniform thicknesscomplying with AS 1577)

Design A Design B

1.2 m x 2 x 23.6 m x 7 x 7

Couplers(with compatible characteristics complyingwith AS 1576.2)

Design A Design BRight anglecouplers

x 70 x 56

Swivelcouplers

x 8 x 8

Putlogcouplers

x 8 x 8

Accessories(complying with AS 1576.2)

Design A Design B

Base plates x 6 x NilToeboardclips

x 8 x 8

MiscellaneousA 2.0 m length of 11 mm, 12 mm or13 mm diameter 6 x 24 FSWR and a length ofmarlin or mousing wire for each applicant

A bow shackle large enough to take a scaffoldtube

A wedge-type socket of suitable dimensionsand wire rope grip, or a thimble and doublebase clamps

A length of Grade (T) lifting chain inserviceable conditionAt least two lengths of unserviceable or non-lifting chain

11 Tools for the applicantEach applicant must provide (or be providedwith) the following tools:

• scaffold key• torpedo spirit level• retractable tape measure or folding rule• scaffold belt with frogs and holders for

the above• chalk.

12 Personal protective equipment for theapplicantEach applicant must provide (or be providedwith) the following PPE:

• safety helmet complying with AS 1801• sturdy, non-slip footwear that covers

the whole foot• close-fitting clothing.

A safety harness complying with AS 1891and a self-locking anchorage complyingwith BS 5062 must be provided for theapplicant's use when he/she is workingfrom the unplanked framework of thescaffold.


13 Scaffold designA suggested scaffold design is given inAttachment A. This design is suitablewhere the scaffold can be built through afloor penetration or similar.

An alternative scaffold design is given inAttachment B. This design is suitablewhere the scaffold can be hung fromuniversal beams, rolled steel joists, orsimiliar.

The assessor can vary the design to suitlocal circumstances but the constructedscaffold must incorporate the followingfeatures:

• a length of at least two bays;• all standards are hung scaffold tubes;• a platform height at least 2 m below

the overhead supporting structure;• fall arrest anchorage points of at least

1500 kg capacity; and• random planks and putlogs.

Each applicant is to be provided with acopy of the design drawing which must bereturned to the assessor at the conclusionof the assessment.

14 Conduct of assessmentWherever possible, applicants should beassessed in groups of two or three. Whereless than three applicants are to beassessed, the assessor should arrange forassistance (or the assessor may assist).Where two or more applicants areassessed simultaneously, the assessormust ensure that the various tasks areevenly shared so that a full assessment ofeach applicant can be made. This mayinvolve some repetition of tasks.

The performance of each applicant is tobe recorded on the assessor's check list, acopy of which is included in this document.

An applicant passes a practical skillsperformance assessment when each ofthe four sections have been successfullycompleted or are not applicable, asappropriate.

15 Safety of personnelWhere an applicant is working dangerously,recklessly or without the necessary co-ordination and balance, the assessor mustdirect the applicant to cease work andterminate those parts of the assessmentforthwith.

Notes on individual sections

16 Use of safety harness (Section 1)

Note: This section does not apply toapplicants with a Rigging Certificate ofCompetence.

Prior to descending the hung standards, theapplicant must ensure that:

(1) The safety harness has been correctlyinspected in accordance with AppendixA of AS 2626 (see Attachment C);

(2) The self-locking anchorage has beencorrectly inspected in accordance withAppendix B of AS 2626 (seeAttachment C);

(3) The safety harness has been correctlyfitted, adjusted and connected; and

(4) The fall arrest system is correctlylocated and fixed to an anchorage pointwith a capacity of at least 1500 kg.

17 Hung scaffold construction (Section 2)

Note: This section does not apply toapplicants with accepted documentaryevidence of adequate experience.

(1) A butt tube is fixed with a right anglecoupler at the lower end of eachstandard prior to the lowering of thestandards;

(2) Right angle couplers and checkcouplers are correctly aligned and fixedto both ends of each standard for theoverhead fixing and the bottom ledgerprior to the lowering of the standards;

(3)


(3) The standards are correctly fixed tothe overhead support;

(4) The scaffold is constructed incompliance with the design drawing.

18 Hung scaffolding work practices(Section 3)

Note: This Section does not apply toapplicants with accepted documentaryevidence of adequate experience.

During the course of erecting anddismantling the scaffold, the applicantmust demonstrate:

(1) An ability to descend and ascend thehung standards in a controlled andconfident manner; and

(2) An ability to work safely andconfidently from the unplankedscaffold.

19 Fixing flexible steel wire rope(Section 4)

Note: This section does not apply toapplicants with a Rigging Certificate ofCompetency.

As a separate exercise, the applicant mustdemonstrate the method of fixing a ledgerto a length of flexible steel wire rope usinga moused bow shackle and either awedge-type socket or double baseclamps. (See Attachment D.)

20 Inspection of chain (Section 5)

Note: This section does not apply toapplicants with a Dogging or RiggingCertificate of Competency.

As a separate exercise, the applicant mustidentify unserviceable items of chain whichcould not be used to support a hungscaffold.


Assessment form: Advanced Scaffolding

Applicant's name ...........................................................

Performance items1 Use of safety harness

Applicant correctly:• inspected harness

• inspected self-lockinganchorage

• fitted, adjusted andconnected harness

• anchored fall arrestsystem

2 Hung scaffold constructionApplicant ensured:• butt tubes fixed to

standards

• right angle couplers andcheck couplers alignedand fixed

• standards fixed

• scaffold complies withdrawing

3 Hung scaffolding workpracticesApplicant:• descends and ascends

in a confident andcontrolled maner

• works safely andconfidently from theunplanked scaffold

4 Fixing flexible steel wire rope

5 Inspection of chain



Advanced Scaffolding Practical

ATTACHMENT A

Suggested scaffold design (with floor penetration)



ATTACHMENT B

Suggested scaffold design (with supporting beams)



ATTACHMENT C

Extracts from AS 2626

INSPECTION OF BELTS AND HARNESSES CHECKLIST

This Appendix lists items of safety belts and harnesses to be inspected and thoseconditions/faults to be checked

Component Condition/fault to be checkedWebbing Cuts or tears

Abrasion damage especially where there is contact with hardwareExcessive stretchingDmaage due to contact with heat, corrosives, or solventsDeterioration due to rotting, mildew, or ultraviolet exposure

Snap hooks Distortion of hook or latchCracks or forging foldsWear at swivels and latch pivot pinOpen rollersFree movement of the latch over its full travelBroken, weak or misplaced latch springs (compare if possible with a new snaphook)Free from dirt or other obstruction, eg. Rust

D-rings Excessive ‘vertical’ movement of the straight portion of the D-ring at itsattachment point on to the belt, so that the corners between the straight andcurved sections of the D become completely exposedNOTE: Excessive vertical movement of the D-ring in its mounting can allow thenose of larger snap hooks to become lodged behind the straight portion of theD, in which position athe snap hook can often accidentally ‘roll out’ of the Dunder load.Cracks, especially at the intersection of the straight and curved portionsDistortion or other physical damage of the D-ringExcessive loss of cross-section due to wear

Buckles and adjusters Distortion or other physical damageCracks and forging laps where applicableBent tonguesOpen rollers

Sewing Broken, cut or worn threadsDamage or weakening of threads due to contact with heat, corrosives,solvents or mildew

Ropes CutsAbrasion or frayingStretchingDamage due to contact with heat, corrosives, solvents, etcDeterioration due to ultraviolet light or mildewNOTE: See also Appendix C.

Chains Physical damageSecurity of attachments to snap hooks, rings, and similar components



ATTACHMENT C (cont.)

Extracts from AS 2626

INSPECTION OF SELF-LOCKING ANCHORAGES CHECKLIST

This Appendix lists items of self-locking anchorages to be inspected and particularconditions/faults to be checked.

Component Condition/fault to be checkedRope (Fully extend rewinddrum anchorage)

CutsAbrasion or frayingStretchingDamage due to contact with heat,corrosives, or solventsExcessive dirt or grease impregnationNOTE: See also Appendix C.With rewind anchorages give a firm pull with the rope fully extendedTo check that the rope end is securely anchored to the drum

Anchorage body (a) Mounting ring:Physical damage or wear, especially at any pivot pointsCracks, especially in cornersMounting security

(b) Anchorage body proper:Physical damage such as significant dents, distortion, or corrosionAs far as possible but, without dismantling, check for the entry offoreign bodies such as small stonesLoose or missing screws, nuts or similar objects (external checkonly)Position of the clutch compression indicator button (fitted only torewind drums with steel rope)

Locking mechanism andrope guides

Check externally visible rope guides for excessive wear or ridgingCheck that the rope-locking mechanism locks and holds securely whenthe rope is given a sharp tugEnsure that the rope runs freely through the anchorage with notendency to stick or bind, and that on rewind drum anchorages the roperewinds completely without loss of tension

Hardware Examine the condition and locking action of any associated snap hooksor links



ATTACHMENT D

FSWR fixing method


Advanced scaffolding Practical

RELATIONSHIP TO THE NATIONAL CERTIFICATION STANDARD

THE UNITS OF COMPETENCE

The tasks set for practical skills performanceassessment are intended to assess the appliedknowledge and understanding and thefamiliarity with scaffolding equipment andrecommended work practices additional tothose required for Intermedite Scaffoldingwhich are necessary to carry out the four unitsof competence for Advanced Scaffoldingprescribed by Schedule A of the NationalOccupational Health and Safety CertificationStandard for Users and Operators of IndustrialEquipment.

These are as follows:

1.0 Plan and prepare work2.0 Erect scaffolding/equipment3.0 Inspect, repair and alter

scaffolding/equipment4.0 Dismantle scaffolding/equipment

Each unit of competence is subdivided intoelements of competence, for whichperformance criteria are prescribed.

THE PERFORMANCE CRITERIA

The tasks involved in undergoing the practicalskills performance assessment reflect theNational Standard's following performancecriteria: 1.1.3, 1.1.4, 1.1.7, 1.1.12, 1.1.17,1.2.4, 2.1.4, 2.2.1, 2.2.2, 2.2.3, 2.2.6, 2.2.7,4.2.1 and 4.2.2.

Relevant performance criteria which are notreflected in the Advanced ScaffoldingAssessment have been covered in the BasicScaffolding and Intermediate ScaffoldingAssessments and do not require additionalassessment.

THE RANGE STATEMENT

The tasks making up the practical skillsperformance assessment are focused aroundthe erection and dismantling of a tube-and-coupler hung scaffold.

This type of scaffolding was selected becauseit is regarded as representing the mosthazardous in the work tasks involving thehighest level of practical skills which thescaffolder may be required to undertake duringthe erection and dismantling of the equipmenttypes listed in the National Standard's rangestatement for Advanced Scaffolding.

The model results apply the requirements ofthe National Standard for Plant and the designrequirements of its referenced StandardAS 1576, Scaffolding, to the obligations underState/Territory occupational health and safetylegislation of a person who erects, alters ordismantles scaffolding within the scope of theAdvanced Scaffolding Certificate ofCompetency.




FOR THE



PART TWO

WRITTEN ASSIGNMENT

(Questions and Answers)

Advanced Scaffolding Written Assignment

CONTENTS

Page

ASSESSOR GUIDELINES SPECIFICIntroductory notes 15

INSTRUCTIONS TO APPLICANTS 16

DIRECTIONS: TASKS 1 TO 3 17

ANSWER SHEET 18

MODEL ANSWERSTask One: Calculating rope tension 19Task Two: Minimum breaking load 19Task Three: Calculating stability 19


Advanced Scaffolding Assignment April 1994 15

Assessor guidelines specific

Introductory notes−−−−Assignment

1 The Advanced Scaffolding Certificateencompasses the requirements for theBasic and Intermediate ScaffoldingCertificates. It is preferable that anapplicant for the Advanced ScaffoldingCertificate already holds a Basic andIntermediate Scaffolding Certificate.Otherwise the assessment for an applicantfor the Advanced Certificate mustincorporate the requirements of the Basic,Intermediate and Advanced Certificateassessment.

2 The written assignment for AdvancedScaffolding is one of three assessmentswhich applicants must pass to qualify for aBasic Scaffolding Certificate ofCompetency. The other components area knowledge assessment and aperformance assessment.

3 The written assignment for AdvancedScaffolding is a `closed book' examinationconsisting of a three tasks.

In the written assignment the certificateassessor evaluates the applicant'sconceptual understanding of scaffoldconstruction, his/her ability to apply simplemathematics and physics and ability tointerpret technical specifications. Oncompletion of the assessment theassessor will determine whether theapplicant can safely undertake, withoutdirect supervision, the tasks encompassedwithin each of the four units ofcompetence comprising AdvancedScaffolding prescribed by Schedule A ofthe National Occupational Health andSafety Certification Standard for Usersand Operators of Industrial Equipment(NOHSC: 1006, 1992).

4 The relationship between the three tasksof the assignment and the Standard'sprescribed performance criteria and rangestatements is set out on page 21.

A full assignment includes five minutesreading time and up to 25 minutes tocomplete.

5 To pass the assignment, the applicant mustprovide acceptable solutions for each task.

6 This assessment instrument includes threealternative specifications for each of threeitems of equipment included in theinformation provided to the applicant. Thecertificate assessor must randomly select aspecification for each of the three items ofinformation given to each applicant.

7 An applicant who holds an AdvancedRigging Certificate, or who has previouslypassed a written assignment for AdvancedRigging is not required to undertake thewritten assignment for AdvancedScaffolding.

8 An applicant undergoing re-assessmentmust be re-assessed on all three tasks.

9 Any other partial or full waiver ofassessment should only be permitted incompliance with guidelines, determinationsor advice given to the certificate assessorby the certifying authority.

10 The model answers to the tasks and themethod of determining satisfactorycompletion of each section are provided onpage 19.


INSTRUCTIONS TO APPLICANTS

1 Equipment

To complete this assignment you will needpens or pencils.

You MAY use an eraser and a calculator.

BOOKS AND PREPARED NOTES ARENOT TO BE USED.

2 Reading time

You have five minutes to read theassignment and the attached materialbefore you start writing.

During this five minutes you may ask theassessor questions about the assignmentinformation and tasks.

3 The assignment

The assignment contains:

• one set of directions

• three tasks for you to do

WRITE YOUR NAME AT THE TOP OFEACH PAGE.

4 Time allowed

You have 25 minutes to complete all threetasks.


Directions: Tasks 1 to 3

INTRODUCTION

You are required to erect a suspended scaffoldwith a rope length of 50 m supported from acounterweighted cantilevered suspension rig.

Your assessor will have indicated to you whichalternatives are to be used for your taskcalculations.

1 Type of cradle:

a Individual cradle supported from twoneedles with one suspension rope andone scaffolding hoist per needle. Thecradle has a dead load of 100 kg and aworking load limit of 250 kg; OR

b Work cage supported from one needlewith one suspension rope and onescaffolding hoist. The work cage hasa dead load of 75 kg and a workingload limit of 200 kg; OR

c Boatswain's chair supported from oneneedle with one suspension rope andone scaffolding hoist. The seat has adead load of 15 kg and a workingload limit of 150 kg.

2 Type of scaffolding hoist:

a Electrically powered hoist with arated SWL hoisting of 750 kg using asuspension rope with a dead load of36 kg per 100 m and a load limitingdevice set at the maximum allowableoverload; OR

b Electrically powered hoist with arated SWL hoisting of 500 kg using asuspension rope with a dead load of31 kg per 100 m and a load limitingdevice set at the maximum allowableoverload; OR

c Manually operated hoist with a deadload of 35 kg and a rated SWL hoistingof 350 kg using a suspension rope witha dead load of 26 kg per 100 m.

3 Description of needle:

a Outboard of 1.0 m and an inboard of5.5 m; OR

b Outboard of 0.75 m and an inboard of4.0 m; OR

c Outboard of 0.5 m and an inboard of3.0 m.

Task 1: Calculate the maximum rope tension.

Task 2: Calculate the suspension rope'sminimum guaranteed breaking load.

Task 3: The counterweights each weigh25 kg. Calculate the number ofcounterweights required at theinboard end of the needle.


Advanced Scaffolding Written Assignment

Applicant's name ............................................

ANSWER SHEET

Task 1:

Task 2:

Task 3:

Advanced ScaffoldingAssignment April 1994 19

Model answers

Explanatory notes for Certificateassessors

TASK ONE:CALCULATING ROPE TENSION

Task answer and commentary

Note: The following answers are based on therequirements given in Clauses 4.5 and 4.7 ofAS 1576.4.

For Hoist a:955.5 kg [(750 kg x 1.25) + (36 kg/2)]

For Hoist b:640.5 kg [(500 kg x 1.25) + (31 kg/2)]

For Hoist c: as follows:With Cradle a: 348 kg [(26 kg/2) + 35 kg + (100 kg/2) + 250 kg]

With Cradle b: 323 kg [(26 kg/2) + 35 kg + 75 kg + 200 kg]

With Cradle c: 213 kg [(26 kg/2) + 35 kg + 15 kg + 150 kg]

TASK TWO:CALCULATING MINIMUM BREAKINGLOAD


Note: The following answers are based onClause 5.4.2 (b) of AS 1418.2.

For Hoist a:7,500 kg [750 kg x 10]

For Hoist b:5,000 kg [500 kg x 10]

For Hoist c:2,450 kg [350 kg x 7]

TASK THREE:CALCULATING STABILITY


Note: The following answers are based onClause 4.8.2 of AS 1576.4. and are calculatedusing the formula:

No. of counterweights= 3 x Rope tension (in kg) x Outboard (in mm)Inboard (in mm) x mass of counterweight (in kg)

ANSWERS Cradle Hoist Answer

Needle a with: a a 21a b 14a c 8

b a 21b b 14b c 8

c a 21c b 14c c 5

Needle b with: a a 22a b 15a c 8

b a 22b b 15b c 8

c a 22c b 15c c 5

Advanced ScaffoldingAssignment April 1994 20

Needle c with: a a 20a b 13a c 7

b a 20b b 13b c 7

c a 20c b 13c c 5

END OF MODEL ANSWERS


Advanced ScaffoldingWritten Assignment



The three tasks which comprise the writtenassignment are intended to assess theconceptual understanding, numeracy andability to interpret technical data additional tothat required for Basic and IntermediateScaffolding which are required to carry out thefour units of competence for AdvancedScaffolding prescribed by Schedule A of theNational Occupational Health and SafetyCertification Standard for Users and Operatorsof Industrial Equipment.






The tasks of the written assignment reflect theNational Standard's following performancecriteria: 1.1.7, 1.1.8, 1.1.17, 2.2.4, 3.2.1, 3.2.2,3.2.3, 4.1.1, 4.1.3, 4.2.1 and 4.2.2.

Relevant performance criteria which are notreflected in the Advanced Scaffoldingassessment have been covered in the BasicScaffolding and Intermediate Scaffoldingassessments and do not require furtherassessment.

THE RANGE STATEMENT

The tasks making up the written assignment arerelated to suspended scaffolding.

This type of scaffolding was selected because itis regarded as representing the most complex ofthe equipment types listed in the NationalStandard's range statement for AdvancedScaffolding.

The model answers apply the requirements ofthe National Standard for Plant and the designrequirements of its referenced StandardAS 1576, Scaffolding, to the obligations underState/Territory occupational health and safetylegislation of a person who erects, alters ordismantles scaffolding within the scope of theAdvanced Scaffolding certificate of competency.

The model solutions are derived frominformation given in AS/NZS XXXX,Guidelines for Scaffolding, which the WorksafeAustralia Scaffolding and Rigging ExpertWorking Group have endorsed as a suitable testfor determination of applicants' solutions toassignment tasks for Advanced Scaffolding.




FOR THE



PART THREE

KNOWLEDGE ASSESSMENT

(Questions and Answers)

Advanced Scaffolding Knowledge Assessment

CONTENTSPage

ASSESSOR GUIDELINES SPECIFICIntroductory notes 25

KNOWLEDGE QUESTIONSSection One: Hung scaffold requirements 27Section Two: Suspended scaffold requirements 27

MODEL ANSWERSSection One: Hung scaffold requirements 29Section Two: Suspended scaffold requirements 29

LIST OF REFERENCES 30


ASSESSMENT STANDARD 32

Advanced Scaffolding Knowledge April 1994 25

Assessor guidelinesspecific

Introductory notes−−−−Knowledge

1 The Advanced Scaffolding Certificateencompasses the requirements for theBasic and Intermediate ScaffoldingCertificates. It is preferable that anapplicant for the Advanced ScaffoldingCertificate already holds a Basic andIntermediate Scaffolding Certificate. Otherwise the assessment for an applicantfor the Advanced Certificate mustincorporate the requirements of the Basic,Intermediate and Advanced Certificateassessment.

2 The knowledge assessment for AdvancedScaffolding is one of three assessmentswhich applicants must pass to qualify for aAdvanced Scaffolding Certificate ofCompetency. The other components area written assignment and a performanceassessment.

3 The knowledge assessment for AdvancedScaffolding is a `closed book' short-answer examination divided into twosections. The questions in each sectionare to be randomly selected from a bankwhich contains a total of 31 questions.

In the knowledge assessment thecertificate assessor evaluates theapplicant's underpinning knowledge. Oncompletion of the assessment theassessor will determine whether theapplicant can safely undertake, withoutdirect supervision, the tasks encompassedwithin each of the four units ofcompetence comprising AdvancedScaffolding prescribed by Schedule A ofthe National Occupational Health andSafety Certification Standard for Usersand Operators of Industrial Equipment(NOHSC: 1006, 1992).

4 The relationship between the questionsand the Standard's prescribedperformance criteria is set out on page 13.

5 A full knowledge assessment consists of 10questions and can take up to 10 minutes tocomplete. The time permitted for partialassessments should be approximately oneminute per question.

There are two ways in which the knowledgeassessment can be conducted. These are:

• By written examination. Where thismethod is used, the applicant must begiven the chance to be orally assessedon any questions which are notcompleted in writing;

• By oral examination. Where thismethod is used, the assessor will enterthe applicant's answers on to theexamination paper.

6 To pass the assessment, the applicant mustcorrectly answer (either in writing or orally)a majority of the randomly selectedquestions in each of the following sections:

Section 1: Hung scaffold requirements(3 selected from 9)

Section 2: Suspended scaffoldrequirements(7 selected from 22)

7 An applicant who holds an AdvancedRigging Certificate, or who has previouslypassed a knowledge assessment forAdvanced Rigging, does not requireassessment in Section 2.

8 An applicant undergoing re-assessmentneed only be re-assessed in those sectionsin which he or she previously failed to answer a majority of selected questionscorrectly.

9 Any other partial or full waiver of knowledgeassessment should only be permitted incompliance with guidelines, determinationsor advice given to the certificate assessorby the certifying authority.


10 The model answers to the bank ofquestions are on page 19.

Where appropriate, model answersinclude acceptable alternatives given inbrackets.

11 Applicants may use alternative compatiblemetric units from those given in the modelanswers. For example, where the modelanswer is 250 mm, an answer of 25 cm or0.25 m is acceptable.

12Where the model answer includes a unit ofmeasurement, an applicant's answerwhich is not qualified with a unit ofmeasurement is unacceptable. Forexample, where the model answer is250 mm, an answer of 250 is NOTacceptable.

13An applicant who uses an imperial unit ofmeasurement in an answer must be giventhe opportunity by means of oralquestioning to convert the answercorrectly to an appropriate metricmeasurement. An inability to convert animperial measurement correctly isregarded as a failure to answer thequestion.


Advanced ScaffoldingKnowledge Questions

SECTION ONE:HUNG SCAFFOLD REQUIREMENTS

Note: Select three questions at randomfrom the following nine. To pass thissection, the applicant must answer at leasttwo of the selected questions correctly.

1 (a) Would you use open-ended hook-rodsto construct a hung scaffold?

1 (b) What is the minimum diameter offlexible steel wire rope you would useto support a hung scaffold?

1 (c) Will a Grade (M) chain support agreater or a lesser load than a Grade (T)chain?

1 (d) What is the minimum working loadlimit for beam clamps, trolleys andshackles used to support a hungscaffold?

1 (e) What would you use to protect aflexible steel wire rope from damagewhen it is fixed around the sharp edgesof a beam?

1 (f) When a ledger is supported in the eyeof a sling, how would you stop it fromsliding?

1 (g) How would you stop shackle pins fromunwinding?

1 (h) What sort of coupler bolt-threads areunsuitable for fixing hung standards?

1 (I) Would you extend the length of a hungstandard by fixing scaffold tubes withend-to-end couplers?

SECTION TWO:SUSPENDED SCAFFOLD REQUIREMENTS

Note: Select seven questions at randomfrom the following 22. To pass this section,the applicant must answer at least four of theselected questions correctly.

2 (a) What is the minimum rated workingload for a trolley used to support asuspension rope?

2 (b) Would you fix a cradle's working loadlimit sign to the inside or to the outsideof the cradle?

2 (c) What is the minimum cradle width for adouble rope suspended scaffold?

2 (d) What is the maximum cradle width for adouble rope suspended scaffold?

2 (e) What is the minimum width of a swingstage cradle?

2 (f) What is the maximum width of a swingstage cradle?

2 (g) What is the minimum width of a workcage?

2 (h) What is the maximum width of a workcage?

2 (I) What is the minimum height of astabilising sheave above the platform ofa work cage?

2 (j) Would you fix the inboard end of aneedle with friction anchors?

2 (k) Can bags of sand be used tocounterweight a needle?

2 (l) Would you use counterweights to fix aneedle which supports two suspensionropes?


2 (m) What is the maximum rope tensionallowed on a shackle used to support asuspension rope?

2 (n) What is the maximum rope tensionallowed on a choked sling used tosupport a suspension rope?

2 (o) Where two trolleys are used to supporta swing stage, how would you stopthem from spreading?

2 (p) When a drum-type scaffolding hoist isat its lowest point, how many full turnsof rope should remain on the drum?

2 (q) With a fully-loaded drum-typescaffolding hoist, how far should thedrum flange extend beyond the built-up rope?

2 (r) When a climber-type scaffolding hoistis at its lowest point, what is theminimum length of spare rope?

2 (s) Would you use bulldog grips to securea suspension rope?

2 (t) What type of suspended scaffold doesnot need a protective device for eachscaffolding hoist?

2 (u) What type of scaffolding hoist must befitted with a load limiting device?

END OF QUESTIONS


Model answers

SECTION ONE:HUNG SCAFFOLD REQUIREMENTS(Reference: Guidelines for Scaffolding)

Question Answer Reference

1 (a) No AS/NZS 4576,Clause 10.9Page 67

1 (b) 11 mm AS/NZS 4576,Clause 10.9,Page 68

1 (c) A lesser load AS/NZS 4576Clause 8.12,Page 44

(Note: See below)

1 (d) 500 kg AS/NZS 4576Clause 10.9,Page 68

1 (e) Beam chaffers AS/NZS 4576(or half rounds Clause 10.9,or split tubes) Page 68

1 (f) Fix a coupler AS/NZS 4576on each side Clause 10.9,

Page 68

1 (g) Mouse them AS/NZS 4576Clause 10.9,Page 68

1 (h) Speed threads AS/NZS 4576(or multi-start Clause 10.9,threads) Page 67

1 (i) No AS/NZS 4576Clause 10.9,Page 68

SECTION TWO:SUSPENDED SCAFFOLDREQUIREMENTS


2 (a) 500 kg AS/NZS 4576, Clause 11.7,

Page 78

2 (b) To the inside AS/NZS 4576,Clause 11.13Page 81

2 (c) 900 mm AS/NZS 4576,Clause 11.13Page 81

2 (d) 1.7 m AS/NZS 4576,Clause 11.13Page 81

2 (e) 450 mm AS/NZS 4576,Clause 11.13Page 81

2 (f) 900 mm AS/NZS 4576,Clause 11.13Page 81

2 (g) 750 mm AS/NZS 4576,Clause 11.13Page 81

2 (h) 1.5 m AS/NZS 4576,Clause 11.13Page 81

2 (i) 2 m AS/NZS 4576,Clause 11.13,Page 81

2 (j) No AS/NZS 4576,Clause 11.5.4,Page 76

2 (k) No AS/NZS 4576,Clause 11.5.6,Page 77

2 (l) No AS/NZS 4576,Clause 11.5.6,Page 77



2 (m) 80% of rated AS/NZS 4576,working load Clause 11.6,(or 80% of SWL) Page 78

2 (n) 40% of rated AS/NZS 4576,working load Clause 11.6,(or 40% of SWL) Page 78

2 (o) Connect them AS/NZS 4576,with a spacer tie Clause 11.7,(or spreader bar) Page 78

2 (p) 3 AS/NZS 4576,Clause 11.5.8,

Page 78

2 (q) 2 rope diameters AS/NZS 4576,Clause 11.5.8,

Page 78

2 (r) 1 m AS/NZS 4576,Clause 11.5.8,

Page 78

2 (s) No AS/NZS 4576,Clause 11.5.8,

Page 77

2 (t) A double rope AS/NZS 4576,suspended Clause 11.11,scaffold Page 80

(Note: See below)

2 (u) An electrically AS/NZS 4576,powered Clause 11.12,scaffolding Page 80hoist

ENF OF MODEL ANSWERS

LIST OF REFERENCES

The sole direct reference used for thisassessment is:

AS/NZS 4576, Guidelines for Scaffolding - 1995

Please note: This reference is currentlybeing updated for publication. When available,this assessment instrument will be reviewed toensure accuracy of questions, answers andreferenced clauses.


Advanced Scaffolding Knowledge Questions



The questions selected at random from the twosections of the knowledge assessment areintended to assess underpinning knowledgeadditional to the knowledge required for Basicand Intermediate Scaffolding which isrequired to carry out the four units ofcompetence for Advanced Scaffoldingprescribed by Schedule A of the NationalOccupational Health and Safety CertificationStandard for Users and Operators of IndustrialEquipment.






The relationship between each group ofquestions and the National Standard'sperformance criteria is as follows:

Section 1: Hung Scaffold RequirementsThese questions reflect performancecriteria 1.1.7, 1.1.17, 1.2.4, 2.1.4,2.2.1, 2.2.3, 2.2.4, 2.2.6, 3.1.1, 3.2.1,3.2.2, 3.2.3, 4.1.1, 4.1.2, 4.1.3, and4.2.1.

Section 2: Suspended ScaffoldRequirements These questionsreflect performance criteria 1.1.7,1.1.8, 1.1.17, 2.1.4, 2.2.1, 2.2.3, 2.2.4,3.1.1, 3.1.2, 3.2.1, 3.2.2, 3.2.3, 4.1.1,4.1.2, 4.1.3, and 4.2.1.

Relevant performance criteria which are notreflected in the Advanced Scaffoldingassessment have been covered in the BasicScaffolding and Intermediate Scaffoldingassessments and do not require furtherassessment.

THE RANGE STATEMENT

The bank of questions assesses knowledgewhich directly relates to the full equipmentrange listed in the National Standard's rangestatement for Advanced Scaffolding. Theseare as follows:

• hung scaffolds• suspended scaffolds

The model answers apply the requirements ofthe National Standard for Plant and its relevantreferenced Standards to the obligations underState/Territory occupational health and safetylegislation of a person who erects, alters ordismantles scaffolding and associatedequipment within the scope of the AdvancedScaffolding certificate of competency. Inparticular, the model answers are consistentthe following referenced Standard:

AS 1576, Scaffolding.

The model answers are taken fromAS/NZS XXXX, Guidelines for Scaffolding,which the Worksafe Australia Scaffolding andRigging Expert Working Group has endorsedas a suitable text for the determination ofapplicants' answers for Advanced Scaffolding.


Assessment standard

! Advanced scaffolding

Form ofAssessment

Completed withinallowed time

(Yes, No or NA)

Sections Overall result(C or NYC)

1 2 3 4 5

Practical skills

Assignment

Knowledge

C = competentNYC = not yet competent NA = not applicable

SummaryApplicant is: • COMPETENT Date: ................................................(circle the result obtained)

• NOT YET COMPETENT

Name of ................................................... Name ofassessor ............................................... applicant ..........................................................

Signature .............................................. Signature .........................................................

Comments/feedback(assessors to make any additional comments which clarify the assessment)

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C2 Slewing Mobile Cranes (up to 20 tonnes)C6 Slewing Mobile Cranes (up to 60 tonnes)CN Non-Slewing Mobile CranesCV Vehicle Loading Cranes

DG Dogging

HM Hoists - Material HoistsHP Hoists - Personnel & Materials

LF Forklift Truck

RA Advanced RiggingRB Rigging BasicRI Rigging Intermediate

SA Advanced ScaffoldingSB Basic ScaffoldingSI Intermediate Scaffolding

WP Boom-type Elevated Work Platforms● VL - Vertical Lift ● SL - Scissor Lift - Self Propelled● TL - Trailer Lift ● BL - Boom Lift - Self Propelled● TM - Truck Mounted Boom Lift

Height Safety RegulationsRed CardBoat LicenceEarth Moving -● Bobcat ● Excavator ● Backhoe● Dozer ● Frontend Loader

Refresher Training - individuals and small groupsNeil Francis, ManagerNeil Francis, ManagerMobile:Mobile: 0419 592 4040419 592 404Freecall: Freecall: 1800 064 9661800 064 966

P.O. Box 1103, Moe Vic. 3825Fax: (03) 5126 3210

Email: [email protected]

ABN: 85 066 339 110

Documents

Scaffolding