Basic Scaffolding - Literature

5/21/2018 Basic Scaffolding - Literature

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Neil Francis, ManagerNeil Francis, Manager

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Name

SBASSESSMENT INSTRUMENT

SCAFFOLDING

BASIC


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Basic ScaffoldingAssignment April 19941

Basic Scaffolding

ASSESSMENT

Part 1 Practical

Part 2 Assignment

Part 3 Knowledge

April 1994


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Basic ScaffoldingAssignment April 19942

National Occupational Health and Safety Certification Standardfor

Users and Operators of Industrial Equipment

ASSESSMENT INSTRUMENT

FOR THE

BASIC SCAFFOLDING

CERTIFICATE OF COMPETENCY

PART ONE

PRACTICAL SKILLS PERFORMANCE ASSESSMENT

(Tasks and Model Results)


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Basic ScaffoldingPractical Skills

CONTENTS

Page

ASSESSOR GUIDELINESSPECIFICIntroductory notes 2Conditions 2Notes on individual sections 4

ASSESSMENT FORM 7

ATTACHMENTS

Attachment A: Suggested modular scaffold design 8Attachment B: Whipping methods for fibre ropes 9Attachment C: Splicing methods for fibre ropes 14Attachment D: Bends and hitches for fibre ropes 15Attachment E: Erection procedure for modular scaffolds 18Attachment F: Use of a handline 20

RELATIONSHIP TO THE NATIONAL CERTIFICATION STANDARD 21

ACKNOWLEDGEMENTS 22


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Basic ScaffoldingPractical April 1994 2

Assessor guidelinesspecific

Introductory notesPractical

1 The practical skills performance assessmentis one of three assessments which

applicants must pass to qualify for a BasicScaffolding Certificate of Competency. Theother components are a knowledgeassessment and a written assignment.

2 The practical skills performanceassessment for Basic Scaffolding is a`closed book' practical exercise covering sixsections.

In practical skills performance assessmentthe certificate assessor evaluates the

applicant's applied knowledge andunderstanding, the applicant's physicalstrength, dexterity, balance, coordinationand motor skills, and the applicant'sfamiliarity with scaffolding equipment andrecommended work procedures. Oncompletion of the assessment the assessorwill determine whether the applicant cansafely undertake, without supervision, thetasks encompassed within each of the fourunits of competence comprising BasicScaffolding prescribed by Schedule A of theNational Occupational Health and SafetyCertification Standard for Users andOperators of Industrial Equipment (NOHSC:1006, 1992).

3 The relationship between the six sections ofthe performance assessment and theStandard's prescribed performance criteriaand range statements is set out on page 21.

A full assessment should be completed

within two and one half hours.

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

Section 1: Inspection of equipmentSection 2: Fibre ropesSection 3: Scaffold constructionSection 4: Erection and dismantling skillsSection 5: Tie constructionSection 6: Scaffold inspection

4 An applicant who holds a Dogging Certificateor a Basic, Intermediate or Advanced RiggingCertificate, or who produces proof of havingpassed a Dogging practical skillsperformance assessment for fibre ropes doesnot require assessment in Section 2.

5 An applicant who produces a satisfactoryrecord of training (such as a log book) whichestablishes at least 100 working days ofexperience in the erection and dismantling ofscaffolds (of which at least 50 days involvedmodular scaffolds) does not requireassessment in Sections 3 and 5.

6 An applicant undergoing re-assessment need

only be re-assessed in those sections inwhich he or she previously failed.

7 Any other partial or full waiver of assessmentshould only be permitted in compliance withguidelines, determinations or advice given tocertificate assessors by the certifyingauthority.

Conditions

8 Location

The practical skills assessment can beconducted at any location which has:

sufficient clear space for the scaffold tobe erected and dismantled;

a firm supporting surface for the scaffold;and

a suitable supporting structure for tyingthe scaffold.

9 Minimum serviceable scaffoldingequipment

The following should be used as a guide bythe assessor. The actual quantities anddimensions may vary depending upon themodular system to be used and the tieconstruction used.

Modular equipment Adjustable baseplates x 10


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2.0 m standards x 163.0 m standards x 22.4 m ledgers x 241.2 m transoms x 181.2 m return transoms x 31.2 m ladder access putlogs x 13.6 m braces x 12.0 m braces x 62-plank platform brackets x 42.4 m bracket tie-bars x 22.4 m captive planks x 201.2 m captive planks x 5

Tube-and-coupler2.7 m tubes x 22.4 m tubes x 20.9 m tubes x 60.6 m tubes x 2Right angle couplers x 18

Miscellaneous5.0 m or 6.0 m ladder x 11.0 m FSWR, 8 mm to 20 mm

diameter x 1Lashing or fixing for ladderSoleplates (where necessary)Sufficient toeboard clipsBarricades, warning signs or similiar

(where necessary)6.0 m fibre rope handline2.0 m of fibre rope and a length of cord

for each applicant

10 Minimum unservicable equipmentSeveral items of unservicable equipmentmust be randomly mixed into the stock ofservicable scaffolding equipment. Thefollowing can be used as a guide by theassessor but can be varied depending uponavailability:

Right angle couplers: stripped,

frozen or bent x 2Scaffold tubes: flame-cut,bent or too thin x 2

Captive planks: warped,twisted or damaged ends x 2

Ledgers or transoms: wedgesmissing or broken welds x 2

Adjustable baseplates:bent plates or fully windable x 2

FSWR: worn outer wires, birdcaged,crushed strands, severe corrosion,popped core or severe kinking x 2

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

scaffold key

podger hammer

torpedo spirit level

retractable tape measure or folding rule

scaffold belt with frogs and holders forthe above.

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

safety helmet complying with AS 1801

sturdy, non-slip footwear that covers thewhole foot

close-fitting clothing.

13 Scaffold designA suggested modular scaffold design is givenin Attachment A. The assessor can vary thedesign to suit local circumstances but theconstructed scaffold must incorporate the

following features:

a return

ladder access

platform brackets

a height of at least 2.5 m above the baselift.

Each applicant is to be provided with a copyof the design drawing which must be returnedto the assessor at the conclusion of the

assessment.

14 Conduct of assessmentWherever possible, applicants should beassessed in groups of 2 or 3. Where a singleapplicant is to be assessed, the assessorshould arrange for another person to assist(or the assessor may assist).


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Where two or more applicants are assessedsimultaneously, the assessor must ensurethat the various tasks are evenly shared sothat a full assessment of each applicant canbe made. This may involve some repetitionof tasks.

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

An applicant passes a practical skillsperformance assessment when each of thesix 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 Inspection of equipment (Section 1)

Note: This section applies to all

applicants.

The certificate assessor must ensure thatthe servicable equipment and theunservicable equipment have beenrandomly mixed prior to the assessment.

The certificate assessor directs theapplicant to inspect the equipment and toidentify and isolate all unservicable items.

To complete this section successfully, the

applicant must identify and isolate at least80% of the unservicable items from theavailable stock of scaffolding equipment.

17 Fibre ropes (Section 2)

Note: This section does not apply toapplicants who hold a Certificate ofCompetency for Dogging or Rigging orwho have previously passed a Doggingpractical skills performance assessment

for fibre ropes.

The applicant is provided with a length ofwhipping cord and a 2m length of 3-strandhawser-laid natural fibre rope, 12 mm to 16 mm indiameter.

The applicant is assessed on seven separatetasks as follows:

(1) Whipping (one task)The certificate assessor directs theapplicant to whip one end of the rope. Theapplicant may choose one of the followingmethods:

a Common whipping;b West Countryman's whipping;c American whipping;d Sailmaker's whipping.

Attachment B illustrates these methods forthe benefit of the certificate assessor.

(2) Splicing (one task)The certificate assessor directs theapplicant to splice the other end of the rope.The certificate assessor may request eitherof the following splices:

a End splice (back splice);b Eye splice.

Attachment C illustrates these methods forthe benefit of the certificate assessor.

(3) Bends and Hitches (five tasks)The certificate assessor directs theapplicant to demonstrate each of thefollowing bends and hitches:

a clove hitch around a tube;b rolling hitch around a tube;c single bowline ;d timber hitch and half hitch around a

plank;e sheet bend to another rope.

Attachment D illustrates these methods forthe benefit of the certificate assessor.

To complete this section successfully, theapplicant must correctly perform at least sixof the seven tasks.


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18 Scaffold construction (Section 3)

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

This section involves the erection of a

modular scaffold with an external return andplatform brackets at the corner of a buildingor structure.

The surface on which the scaffold is to beconstructed should be uneven. Ifnecessary, the certificate assessor cansimulate uneven ground by usingstrategically placed blocks of wood orsimilar.

The certificate assessor provides the

applicant with the design drawing for thescaffold.

During the construction of the scaffold, thecertificate assessor uses the following 13items to gauge the applicant's competence:

a Where appropriate, the constructionarea is barricaded, cordoned off orsign-posted;

b Soleplates are correctly positioned and

bear fully on the supporting surface;

c Adjustable baseplates are correctlypositioned and bear fully on thesoleplates;

d Standards are correctly placed;

e Transoms and ledgers are correctlypositioned and fixed at each lift (NOT`hit-and-missed');

f Braces are correctly positioned andfixed;

g The scaffold is square, level andplumb;

h Platform brackets and tie-bars arecorrectly located and fixed;

I Planks are correctly located;

j Toeboards are correctly located andfixed;

k Guardrails and midrails are correctlylocated and fixed;

l he ladder is correctly positioned, pitchedand fixed;

m The configuration, positioning, baylengths and lift heights of the scaffoldcomply with the drawing.

To complete this section successfully, theapplicant must have achieved at least 10 ofthe 13 items.

19 Erection and dismantling skills(Section 4)

Note: This section applies to allapplicants. For applicants who do not

need to complete Section 3, the followingcan be assessed on an existing scaffoldor, where there is no existing scaffold, byconstructing and dismantling a single bayat least two lifts in height.

During the course of erecting and dismantlingthe scaffold, the applicant must clearlydemonstrate:

a An ability to work confidently and safelyat heights;

b An ability to use tools confidently andsafely at heights;

c An ability to safely pass up, receive andposition scaffolding components atheights, including the safe use of ahandline;

Attachment E illustrates an acceptablemodular scaffolding erection procedure for

the benefit of the certificate assessor.

Attachment F illustrates the use of a handlinefor the benefit of the certificate assessor.

To complete this section successfully, theapplicant must clearly demonstrate all of theabove-listed abilities.


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20 Tie construction (Section 5)

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

The certificate assessor selects a tie

assembly method suitable for thesupporting structure.

The certificate assessor directs theapplicant to construct the selected tieassembly.

The certificate assessor uses the following4 items to gauge the applicant'scompetence:

a The tie tube is fixed horizontally to two

standards or two ledgers with rightangle couplers;

b All bearing surfaces of the assemblyare fixed hard to the supportingstructure;

c The tie does not obstruct clear access;

d The tie assembly has been correctlyconstructed.

To complete this section successfully, theapplicant must have achieved at least threeof the four items.

21 Scaffold inspection (Section 6)

Note: This section applies to allapplicants.

The certificate assessor directs theapplicant to identify the key items to bechecked in carrying out a scaffold

inspection.

The certificate assessor will use thefollowing list of six items to gauge theapplicant's ability to inspect a scaffoldcompetently.

a Check that standards are bearingcorrectly;

b Check for missing structuralcomponents;

c Check for damaged components;

d Check condition of working and accessplatforms;

e Check tie fixings;

f Check that ladder is secure.

To complete this section successfully, theapplicant must have identified at least five ofthe six items.


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Assessment form: Basic ScaffoldingApplicant's name..........................................................

Performance items1 Inspection of equipment

Applicant identified andisolated at least 80% ofunserviceable items

2 Fibre ropesApplicant completed:

whipping (common/West-Countryman's/American/sailmaker's)

splicing (end splice/eyesplice)

bends and hitches: clove hitch

rolling hitch

single bowline

timber hitch & halfhitch

sheet bend

3 Scaffold construction

Applicant ensured: area secured/signposted

soleplates positionedand fully bearing

adjustable baseplatespositioned and fullybearing

standards positioned

transoms and ledgerspositioned and fixed

braces positioned andfixed

scaffold squared,levelled and plumbed

platform brackets andtie-bars positioned and

fixed

planks located

toeboards located andfixed

guardrails and midrailslocated and fixed

ladder positioned,pitched and fixed

scaffold complies withthe drawing

4 Erection and dismantlingskillsApplicant:

works confidently andsafely at heights

uses tools confidentlyand safely at heights

passes, receives andpositions componentsand uses handlinesafely

5 Tie construction

located and fixed toscaffold

bearing surfaces fixedhard

clear access notobstructed

correct construction

6 Scaffold inspection bearing of standards

missing components

damaged components

condition of platforms

bearing of ties

fixing of ladder


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Basic ScaffoldingPractical

ATTACHMENT A

Suggested modular scaffold design

NOTE: FOR CLARITY, SOLEPLATES, TOEBOARDSAND LADDER ARE NOT SHOWN


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ATTACHMENT B

Whipping methods for fibre ropes

COMMON WHIPPING

1. Form a loop facing away from the end 2. Pass the long end of the twine over theof the rope leaving one short end and one short end and around the rope.long end of whipping twine.

3. Keep passing the twin aroudn the rope 4. Pull the short end of twine until the longuntil the correct length is achieved. Pass long end is buried about halfway underthe long end of the twine through the the whipping. Now pull each end of theloop twine with equal strength until the whipping

is tight. Trim off the loose ends.


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ATTACHMENT B

Whipping methods for fibre ropes (Cont.)

AMERICAN WHIPPING

1. Lay the end of the twine down and take 2. Now lay the other end down and holda number of turns over the end and the two ends together. Make several.Around the rope. Turns around the rope with one side of

the loop covering the other side ofthe

loop and the rope.

3. Tighten the whipping by pulling the two 4. Tie a reef knot with the two ends toends secure and finish the whipping.


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ATTACHMENT B


WEST-COUNTRYMAN'S WHIPPING

1. Take a turn around the rope with thetwine and form the first overhead knot,ensuring that the two ends of twine leftare of roughly equal length.

2. Take another half turn around the ropewith each length of twine and form asecond overhand knot on the other sideof the rope..

3. Continue tying overhand knots in such away that the knots alternate all the wayup the rope. Finish off with a reef knot-

in other words two overheads knots,one on top of the other.


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ATTACHMENT B


SAILMAKER'S WHIPPING

1. Unlay the rope for about 50 mm and form 2. Lay the rope back up an adjust the twinea loop around a strand with the whipping so that the loop and one end of twine aretwine. The two (2) ends of the twine should approximately 100 mm in length. The

emerge together opposite the strand other end should be about 400 mm in length.with the loop.

3 & 4. Holding the loop and short end of twine with the rope in one hand use the other hand to windthe long end of twine around the rope away from the loop and short end of twine.


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ATTACHMENT B


SAILMAKER'S WHIPPING

5. Pass the loop around the end of the strand 6. Tighten the loop by pulling the shortin such a way that the twine rests in the space end of twine.between the strands.

7 & 8. Now follow the groove left between the strands with the short end of twine and jointhe ends of twine with a reef knot in the middle of the rope.


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ATTACHMENT C

Splicing methods for fibre ropes

CROWN KNOT AND BACK SPLICE

SIDE EYE SPLICE


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ATTACHMENT D

Bends and hitches for fibre ropes

CLOVE HITCH

ROLLING HITCH

Step 1. Lay standing part on object to be lifted Step 2. Pass end of rope around back of Step 3. Pass end of rope around backof

And cross end of rope over the standing object and over the standing part object again and over thestanding

again. Part again.

Step 4. Pass end around the object again this timeforming a half hitch behind standing part.This type of hitch must be accompaniedwith and extra half hitch further along the


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object on the standing part for safety.


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ATTACHMENT D

Bends and hitches for fibre ropes (Cont.)

BOWLINE

TIMBER HITCH(Used to lift lower scaffold planks or assorted timber.)

Step 1. Pass rope around the scaffold plank. Step 2. The end must then go around the standingpart choking it.

Step 3. Using the end of rope we must pass it around. Step 4. The same as above only the end must wraparound itself and trap the rope under itself. around itself at least three times.

Note: When hauling or lowering timber, we use the extra half

hitch for safety.


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ATTACHMENT D

Bends and hitches for fibre ropes (Cont.)

SHEET BEND


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ATTACHMENT E

Erection procedure for modular scaffolds

Step 1

When a lift has been completed, the scaffolderrelocates sufficient planks to the next lift toprovide a platform for further erection. To liftthe last plank, the scaffolder braces his/herback against a standard and keeps the feetspread, with one foot securely on the transomand the other foot securely on the ledger.

Step 2

Components are passed up from below or arelifted up with a handline, gin wheel, hoist orother suitable means.

Step 3The standards which break below guardrailheight are topped up.


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ATTACHMENT E

Erection procedure for modular scaffolds

Step 4As soon as practicable, guardrails arepositioned at all open sides and ends wherethe scaffolder could fall more than 2m fromthe platform. The guardrail is balanced tosecure it at the far end of the bay first.

Step 5

The near-end of the guardrail is secured to thestandard. These guardrails are for thescaffolder's protection and will remain in placeuntil the lift is dismantled. After guardrails

are placed, any standards which break aboveguardrail height are topped up.

Step 6

The next lift of ledgers and transoms is fixed tothe standards. Braces and tie assemblies arefixed where appropriate. The process is thenrepeated for all further lifts until the scaffoldhas reached its required height and therequired working platforms are installed forthe user.


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ATTACHMENT F

Use of a handline


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Basic scaffoldingPractical

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, the physicalstrength, dexterity, balance, coordination andmotor skills, and the familiarity with scaffoldingequipment and recommended work practiceswhich are necessary to carry out the 4 units ofcompetence for Basic Scaffolding prescribedby Schedule A of the National OccupationalHealth and Safety Certification Standard for

Users and Operators of Industrial Equipment.

These are as follows:

1.0 Plan and prepare work.2.0 Erect scaffolding/equipment.3.0 Inspect, repair and alter

scaffolding/equipment.4.0 Dismantle scaffolding/equipment.

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

THE PERFORMANCE CRITERIA

The relationship between each section of thepractical assessment and the NationalStandard's performance criteria is as follows:

Section 1: Inspection of EquipmenThe task in this section reflectsperformance criteria 1.2.1 and

1.2.2.

Section 2: Fibre RopesThe 7 tasks in this section reflectperformance criteria 1.2.4, 1.3.2,2.1.3, 2.2.1, 2.2.6, 3.2.3 and4.2.1.

Section 3: Scaffold ConstructionThe task in this section reflectsperformance criteria 1.1.3, 1.1.7,1.1.9, 1.1.10, 1.1.16, 2.1.1, 2.1.2,2.1.4, 2.2.1, 2.2.3, 2.2.6, 3.2.3,3.2.4, 4.2.1 and 4.2.2.

Section 4: Erection and Dismantling SkillsThe task in this section reflectsperformance criteria 2.2.1, 2.2.2,2.2.6, 3.2.3, 3.2.4, 4.2.1 and 4.2.2.

Section 5: Tie ConstructionThe task in this section reflectsperformance criteria 2.2.1, 2.2.3,2.2.6, 3.2.3, 3.2.4, 4.2.1 and 4.2.2.

Section 6: Scaffold InspectionThe task in this section reflectsperformance criteria 2.2.4, 3.1.1,3.1.2, 3.1.3, 3.2.2, 4.1.1, 4.1.2 and4.1.3.

THE RANGE STATEMENT

The tasks making up the practical skillsperformance assessment are focused aroundthe erection of prefabricated modularscaffolding.

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 BasicScaffolding.

The model results apply the requirements of theNational Standard for Plantand 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 thebasic scaffolding certificate of competency.


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ACKNOWLEDGEMENTS

Mr Phil Court of the Plant Safety Branch, Occupational Health and Safety Authority, Victoria islargely responsible for the development and subsequent high quality of these assessmentinstruments.

The material for Attachments B, C and D is taken from:

A Handbook of Rigging Practice, written by Peter Amjah and published by the NSW TAFE,1991.

The material for Attachment F is taken from:

A Guide to Practical Scaffolding,published by the UK Construction Industry Training Board

(2nd edition, revised 1987).

The material for Attachment E, will form part of the soon-to-be published:

Guidelines for Scaffolding,published jointly by Standards Australia and Standards NewZealand, 1994.


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FOR THE

BASIC SCAFFOLDING


PART TWO

WRITTEN ASSIGNMENT

(Questions and Answers)


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Basic ScaffoldingWritten Assignment

CONTENTS

Page

ASSESSOR GUIDELINESSPECIFICIntroductory notes 25

INSTRUCTIONS TO APPLICANTS 26

DIRECTIONS: SECTIONS 1 TO 4 27Modular scaffolding equipment list 29Sketch number 1 30Drawing VFS/0123 31Handover Certificate 32

MODEL ANSWERSExplanatory notes for Certificate assessors 33

Section One: Estimating equipment quantities 33Section Two: Calculating loads 33Section Three: Construction of ties 35Section Four: Completing a log 36



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Assessor guidelines-specific

Introductory notesAssignment

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

2 The written assignment for BasicScaffolding is a `closed book' examinationconsisting of a total of seven separatetasks. The tasks cover four sections.

In the written assignment the certificateassessor evaluates the applicant'sconceptual understanding of scaffoldconstruction, his/her ability to apply simplemathematics and physics, and ability toread and comprehend the Englishlanguage. On completion of theassessment the assessor will determinewhether the applicant can safelyundertake, without supervision, the tasksencompassed within each of the four unitsof competence comprising Basic

Scaffolding prescribed by Schedule A ofthe National Occupational Health andSafety Certification Standard for Usersand Operators of Industrial Equipment(NOHSC: 1006, 1992).

3 The relationship between the four sectionsof the assignment and the Standard'sprescribed performance criteria and rangestatements is set out on page 36.

A full assignment includes five minutesreading time and up to 55 minutes tocomplete.

4 To pass the assignment, the applicantmust satisfactorily complete each of thefollowing sections:

Section 1: Estimating EquipmentQuantities (One Task)

Section 2: Calculating Loads(Four Tasks)

Section 3: Construction of Ties(One Task)

Section 4: Completing a Log (OneTask)

5 An applicant undergoing re-assessmentneed only be re-assessed in thosesections which he or she previously failed.

6 Any other partial or full waiver ofassessment should only be permitted incompliance with guidelines,determinations or advice given to thecertificate assessor by the certifyingauthority.

7 The model answers to the tasks and themethod of determining satisfactorycompletion of each section are provided on

pages 3335.


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Basic ScaffoldingAssignment April 1994 26

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 assignmenttasks.

3 The assignment

The assignment contains:

one scaffold sketch;

one scaffold drawing;

one equipment order list;

one handover certificate; and

seven tasks for you to do.

WRITE YOUR NAME AT THE TOP OFEACH PAGE.

4 Time allowed

You have 55 minutes to complete allseven tasks.


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Directions: Section 1 to 4

INTRODUCTION

You work for the Very Fast Scaffold Company.

Your supervisor has sent you to the AcmeConstructions building site to take charge ofthe erection of two scaffolds.

The first scaffold is shown on sketch no 1.

The second scaffold is shown on drawing noVFS/0123.

You have also been given a modular

scaffolding equipment list and a handovercertificate.

With the help of these materials, you are tocomplete the following tasks.

SECTION ONE:ESTIMATING EQUIPMENT QUANTITIES

Task 1: On the modular scaffolding equipmentlist, write in the quantities required to

construct the scaffold shown onsketch no 1.

(Do NOT include soleplates. Do NOT includetoeboards.)

SECTION TWO:CALCULATING LOADS

Task 2: Calculate the total weight of theequipment needed to construct the

scaffold shown on sketch No 1.

(Use the weights shown on the modularscaffolding equipment list to help you. DoNOT include soleplates. Do NOT includetoeboards.)

Task 3: Calculate the dead load carried by theadjustable baseplate marked onsketch no 1 as:

A; or

B

(as selected by assessor)

Task 4: The scaffold shown in sketch no 1 willbe used for:

a medium duty work which is 450 kgper bay; or

b heavy duty work which is 675 kgper bay.as selected by assessor)

Each standard is designed to carry up to onethird of the duty live load per bay.

Calculate how many kilograms of live load couldbe carried by the same adjustable baseplateused for Task 3.

Task 5: The soleplates you will use to constructthe scaffold shown in sketch no 1 are300 mm wide.

The site engineer has certified that thesoil supporting the scaffold shown insketch no 1 has a bearing capacity of:

a 2.8 t per square metre; orb 1.65 t per square metre.

(as selected by assessor)

Calculate, to the nearest 10 mm, theminimum length of soleplate you needunder the same adustable baseplateused for Tasks 3 and 4.

(Use the dead load you calculated for Task 3and the live load you calculated for Task 4 tohelp you. Do NOT include toeboards. Do NOTinclude the self-weight of soleplates.)

SECTION THREE:CONSTRUCTION OF TIES

Task 6: On drawing no VFS/0123, mark withcrosses the maximum positions atwhich you would fix the scaffold's ties.

(Plan bracing and ledger bracing is NOT to beused on this scaffold.)


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SECTION FOUR:COMPLETING A LOG

Task 7: You have finished constructing the

scaffold shown on drawing noVFS/0123. It is now ready for use.

Complete the handover certificate for thisscaffold.


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Task 1 Applicant's name..........................................

The Very Fast Scaffolding Company

Modular scaffolding equipment list

Component Length Weight Quantity required

Standard 2.0m 12kg

Standard 3.0m 18kg

Transom 1.2m 8kg

Ledger/Guardrail 2.4m 10kg

Brace (1.2m bay) 2.0m 10kg

Brace (2.4m bay) 3.6m 17kg

Captive Plank (225mm) 1.2m 10kg

Captive Plank (225mm) 2.4m 20kg

Ladder Access Putlog 1.2m 8kg

Adjustable Baseplate 750mm 7kg

Ladder 4m 20kg


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Tasks 1 to 5 Applicant's name...........................................

SKETCH NO 1

NOTE: TOEBOARDS ANDSOLEPLATES ARE NOT SHOWN


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Task 6 Applicant's name............................................

DRAWING NO VFS/0123


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Task 7 Applicant's name............................................

The Very Fast Scaffolding Company

HANDOVER CERTIFICATE Number: 9999

Each of the following items must be completed by the responsible scaffolder:

(1) Client:

(2) Site address:

(3) Scaffold location:

(4) Type of scaffold: Tube-and-coupler/Frame/Tower-frame/Modular/Other(Circle the appropriate type.)

(5) Number of working platforms:

(6) Duty category of working platforms: Light/Medium/Heavy/Special(Circle the appropriate category.)

(7) Number of lifts above base lift:

(8) Scaffold height:

(9) Number of bays long:

(10) Scaffold length:

(11) Type of access: Ladder/Stair/Ramp/Other(Circle the appropriate type.)

(12) Design drawing reference:

(13) Date of handover:

(14) Time of handover:

(15) Name of responsible scaffolder:

(16) Signature of responsible scaffolder:


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Model answers

Explanatory notes for Certificate assessors

1 In marking the assignment, the assessorneeds to be aware that several of thetasks are linked. Therefore a wrongsolution to one task may affect the answergiven in a following task.

For example, if the quantities estimatedfor Task 1 are incorrect, the total weightcalculated for Task 2 will be based on thewrong quantities. In another case, if thedead load has been incorrectly calculatedfor Task 3, this may result in the answer

for Task 5 being different from that shownin the model answers.

2 Where the assessor has identified aninitial calculation as incorrect, anysubsequent use of this incorrect figureshould not necessarily be penalised. Theassessor should calculate answers tosubsequent questions using the incorrectfigure thereby ensuring that the applicantis credited for subsequent correctcalculations.

3 Where appropriate, the methodology hasbeen explained in the model answers toassist the assessment of answers basedon incorrect data.

SECTION ONE:ESTIMATING EQUIPMENT QUANTITIES

Task answer and commentary

Task 1:Note: This question assesses theapplicant's understanding of the function ofcommon prefabricated modular scaffoldingcomponents and ability to calculatequantities from a drawing.

In order to pass Section One, the applicantmust have correctly estimated at least 9 ofthe 11 quantities on the Equipment List .

The correct estimates for the quantities in eachcategory are as follows:

1 Standards (2 m) x 22 Standards (3 m) x 83 Transoms x 204 Ledger/Guardrails x 205 Braces (2 m) x 26 Braces (3.6 m) x 27 Planks (1.2 m) x 2

8 Planks (2.4 m) x 189 Ladder Access Putlogs x 110 Adjustable baseplates x 1011 Ladders x 1

SECTION TWO:CALCULATING LOADS

Note: Four tasks are given in Section Two(Tasks 2 to 5). In order to pass this section,the applicant must correctly complete atleast three of these tasks.


Task 2:Note: This task assesses theapplicant's ability to calculate weight fromquantity.

The answer is achieved by multiplying thequantities estimated for Task 1 in each category

by the component weight given on theequipment list and adding the totals.

If Task 1 was correctly completed, the answershould be 1060 kg(or 1.06 t).

Task 3:Note: This task assesses the applicant'sunderstanding of how dead load isdistributed in a scaffold and the applicant'sability to calculate dead load in a specific

configuration.


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The answer is achieved by adding the self-weight of the adjustable baseplate, the self-weight of the standard, half the self-weight ofeach ledger, transom and brace which is fixedto the standard, and one quarter of the self-weight of each bay of planks supported by thestandard.

For baseplate A, the dead load is 131.5 kg.

For baseplate B, the dead load is 99.5 kg.

Task 4:Note: This task assesses the applicant'sunderstanding of how live load istransmitted to standards and theapplicant's ability to calculate the portionof duty live load acting on a standard in a

specific configuration.

The answer is achieved by dividing the dutylive load by three and multiplying this figure bythe number of working platform bayssupported by the standard.

For baseplate A with medium duty loading, thelive load is 300 kg.

For baseplate A with heavy duty loading, thelive load is 450 kg.

For baseplate B with medium duty loading, thelive load is 150 kg.

For baseplate B with heavy duty loading, thelive load is 225 kg.

Task 5:Note: This task assesses the applicant'sunderstanding of load distribution oversurface area and the applicant's ability to

convert common units of measurement todetermine a single variable (namely, thelength of soleplate required).

The answer is achieved by firstly adding thedead load calculated for Task 3 and the liveload calculated for Task 4 to determine thetotal load carried by the baseplate. This figureis then divided by the bearing pressure (in kgper m

2). The result is then divided by 0.3,

which is the width of the soleplate (in m). Thisanswer (rounded to the nearest 10 mm) isexpressed in metres, or can be converted intosmaller units (such as mm or cm).

If Tasks 3 and 4 have been correctly answered,the answer should be as follows:

For baseplate A medium duty with bearingcapacity of 2.8 t: 0.51 m

For baseplate A heavy duty with bearingcapacity of 2.8 t: 0.69 m

For baseplate A medium duty with bearingcapacity of 1.65 t 0.87 m

For baseplate A heavy duty with bearingcapacity of 1.65 t 1.17 m

For baseplate B medium duty with bearingcapacity of 2.8 t: 0.3 m

For baseplate B heavy duty with bearingcapacity of 2.8 t: 0.39 m

For baseplate B medium duty with bearingcapacity of 1.65 t: 0.5 m

For baseplate B heavy duty with bearingcapacity of 1.65 t: 0.66 m(or 0.65 m)

SECTION THREE:CONSTRUCTION OF TIES


Task 6Note: This question assesses theapplicant's ability to apply the rules for tiespacings specified in Clause 3.6 of AS1576.3, Suppl 1. (These are therecommended specifications referred to byClauses 6.2.4.3 and 6.1.4 of AS/NZS XXXX,Guidelines for Scaffolding.

To pass Section 3, the applicant's marking ofdrawing no VFS/0123 must clearly indicate atleast four of the following five features:

1 A total of 12 tie positions are marked on theelevation.

2 Each tie position is marked close to aledger/standard node-point.

3 There are three tie positions marked ineach end bay (at the first or second pair ofstandards).


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4 The horizontal distance between adjacenttie positions does not exceed 7.2 m (threebays).

5 The vertical distance between thesupporting surface and the first level ofties, and the vertical distance betweeneach level of ties does not exceed 4 m(two lifts).

SECTION FOUR: COMPLETING A LOG


Task 7:Note: This task assesses the applicant'sability to transfer information from a

drawing and use a simple proforma.

To pass this section, the applicant musthave correctly filled in at least 14 of the 16items on the handover certificate.

The correct answers are as follows:

1 Acme Constructions

2 101 National Highway, Satellite City

3 North face

4 Modular

5 1

6 Heavy

7 6

8 12 m

(Note: Height is measured to top liftNOTguardrail)

9 10

10 24 m

11 Ladder

12 VFS/0123

13 As stated (should include day, month andyear)

14 As stated (should include am or pm or begiven in 24 hour form)

15 The applicant's name

16 The applicant's signature

END OF ANSWERS


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The tasks set within the four sections of thewritten assignment are intended to assess theconceptual understanding, English languageliteracy and numeracy required to carry out thefour units of competence for Basic Scaffoldingprescribed by Schedule A of the NationalOccupational Health and Safety CertificationStandard for Users and Operators of IndustrialEquipment.






The relationship between each section of thewritten assignment and the NationalStandard's performance criteria is as follows:

Section 1: Estimating equipmentquantitiesThe task in this section reflects

performance criteria 1.1.3, 1.1.4,1.1.7, 1.1.12, 1.1.16, 1.3.1, 2.2.1,2.2.3, 2.2.4, 3.1.2, 3.2.1 and4.1.1.

Section 2: Calculating loadsThe 4 tasks in this section reflectperformance criteria 1.1.1, 1.1.2,1.1.3, 1.1.4, 1.1.7, 1.1.8, 1.1.9,1.1.10, 1.1.15, 1.1.16, 1.3.1,2.1.4, 2.2.1, 2.2.3, 2.2.4, 3.1.1,

3.1.2, 3.2.1, 3.2.2, 3.2.3, 3.2.4,4.1.1, 4.1.3, 4.2.1 and 4.2.2.

Section 3: Construction of tiesThe task in this section reflectsperformance criteria 1.1.3, 1.1.4,1.1.6, 1.1.7, 1.1.12, 1.1.16, 2.2.1,2.2.3, 2.2.4, 2.2.6, 3.1.1, 3.1.2, 3.2.1,3.2.2, 3.2.3, 3.2.4, 4.1.1, 4.1.2, 4.1.3,4.2.1 and 4.2.2.

Section 4: Completing a log

The task in this section reflectsperformance criteria 1.1.1, 1.1.3,1.1.4, 1.1.8, 1.1.12, 2.2.4, 3.1.1, 3.1.2and 3.1.3.

THE RANGE STATEMENT

The tasks making up the written assignmentassess conceptual understanding, literacy andnumeracy in relation to prefabricated modularscaffolding.

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 BasicScaffolding.

The model answers apply the requirements ofthe National Standard for Plant and the designrequirements of its referenced StandardAS 1576, Scaffolding, to the obligations under

State/Territory occupational health and safetylegislation of a person who erects, alters ordismantles scaffolding within the scope of theBasic Scaffolding certificate of competency.


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FOR THE

BASIC SCAFFOLDING


PART THREE

KNOWLEDGE ASSESSMENT

(Questions and Answers)


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Basic ScaffoldingKnowledge Assessment

CONTENTS

Page

ASSESSOR GUIDELINESSPECIFICIntroductory notes 40

KNOWLEDGE QUESTIONSSection One: Certification 41Section Two: Site hazards 41Section Three: Tools and equipment for scaffolding 41

Section Four: General scaffold requirements 42Section Five: Particular scaffold requirements 43Section Six: Associated equipment requirements 44

MODEL ANSWERSSection One: Certification 45Section Two: Site hazards 45Section Three: Tools and equipment for scaffolding 45Section Four: General scaffold requirements 46Section Five: Particular scaffold requirements 47

Section Six: Associated equipment requirements 48

LIST OF REFERENCES 48


ASSESSMENT STANDARD 51


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Assessor guidelinesspecific

Introductory notesKnowledge

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

2 The knowledge assessment for BasicScaffolding is a `closed book' short-answer examination divided into sixsections. The questions in each sectionare to be randomly selected from a bank

which contains a total of 100 questions.

In the knowledge assessment thecertificate assessor evaluates the extentthe applicant's underlying knowledge. Oncompletion of the assessment theassessor will determine whether theapplicant can safely undertake, withoutsupervision, the tasks encompassedwithin each of the four units ofcompetence comprising Basic Scaffoldingprescribed by Schedule A of the National

Occupational Health and SafetyCertification Standard for Users andOperators of Industrial Equipment(NOHSC: 1006, 1992).

3 The relationship between the questionsand the Standard's prescribedperformance criteria is set out on page 36.

4 A full knowledge assessment consists of

26 questions and can take up to 30minutes to complete. The time permittedfor partial assessments should beapproximately one minute per question.

There are two ways in which theknowledge assessment can be conducted.These are:

By written examination. Where thismethod is used, the applicant must begiven the chance to be orally

assessed on any questions which arenot completed in writing;

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

5 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: Certification (3 selected from12)Section 2: Site hazards (3 selected from 7)Section 3: Tools and equipment for

scaffolding (3 selected from 17)Section 4: General scaffold requirements(7 selected from 26)

Section 5: Particular scaffold requirements(7 selected from 26)

Section 6: Associated equipmentrequirements (3 selected from12)

6 An applicant who holds a Basic,Intermediate or Advanced RiggingCertificate does not require assessment in

Section 6.

7 An applicant undergoing re-assessmentneed only be re-assessed in those sectionswhich he or she previously failed to answera majority of selected questions correctly.

8 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.

9 The model answers to the bank of

questions are on pages 3335.

Where appropriate, model answers includeacceptable alternatives given in brackets.

10 Applicants may use alternative compatiblemetric units to those given in the modelanswers. For example, where the modelanswer is 250 mm, an answer of 25 cm or

0.25 m is acceptable.


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

12 An 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. A failure to convert animperial measurement correctly isregarded as a failure.


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Basic ScaffoldingQuestions

SECTION ONE:

CERTIFICATION

Note: Select three questions at random fromthe following 12. To pass this section, theapplicant must correctly answer at least twoof the selected questions.

1 (a) At what height is a scaffolding certificateof competency needed?

1 (b) Is a person with a Basic Scaffolding

Certificate allowed to construct acantilevered scaffold?

1 (c) Is a person with a Basic ScaffoldingCertificate allowed to construct a barrowramp?

1 (d) Is a person with a Basic ScaffoldingCertificate allowed to construct a towerframe scaffold with outriggers?

1 (e) Is a person with a Basic ScaffoldingCertificate allowed to construct a tube-and-coupler scaffold?

1 (f) Is a person with a Basic ScaffoldingCertificate allowed to install a barrowhoist?

1 (g) Is a person with a Basic ScaffoldingCertificate allowed to construct amodular birdcage scaffold?

1 (h) Is a person with a Basic ScaffoldingCertificate allowed to construct a swingstage?

1 (i) Is a person with a Basic ScaffoldingCertificate allowed to install a safetynet?

1 (j) Is a person with a Basic ScaffoldingCertificate allowed to erect a mastclimber?

1 (k) Is a person with a Basic ScaffoldingCertificate allowed to construct a mobileframe scaffold?

1 (l) Is a person with a Basic Scaffolding

Certificate allowed to install a personneland materials hoist?

SECTION TWO:SITE HAZARDS

Note: Select three questions at random fromthe following seven. To pass this section, theapplicant must correctly answer at least twoof the selected questions.

2 (a) How close to live unprotectedpowerlines would you construct a metalscaffold?

2 (b) How far past each end of the scaffoldshould insulation on live powerlinesextend?

2 (c) How can a scaffold built alongside aroad be protected from traffic damage?

2 (d) What could happen if the tie tubes on a

scaffold stuck out too far when a craneis operating?

2 (e) Name something which might corrodescaffolding equipment.

2 (f) What is the danger where a scaffold isbeing constructed close to machinerywith moving parts?

2 (g) What type of scaffolding material would

you use to construct a scaffold wherethere may be a danger of explosion?


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SECTION THREE:TOOLS AND EQUIPMENT FORSCAFFOLDING

Note: Select three questions at random

from the following 17. To pass this section,the applicant must correctly answer at leasttwo of the selected questions.

3 (a) How far above the maximum nutextension must the spindle of anadjustable baseplate extend?

3 (b) What is the maximum extension on anadjustable baseplate?

3 (c) What is the minimum size of a square

baseplate?

3 (d) What is the minimum outside diameterof a common scaffold tube (to thenearest mm)?

3 (e) What is the minimum wall thickness of acommon steel scaffold tube?

3 (f) What is the minimum wall thickness of acommon aluminium scaffold tube?

3 (g) What is the minimum width of a scaffoldplank?

3 (h) What is the minimum thickness of ahardwood solid timber scaffold plank?

3 (i) What is the minimum thickness of anoregon solid timber scaffold plank?

3 (j) What is the minimum diameter of fibrerope you would use for a handline?

3 (k) What is the minimum diameter of fibrerope you would use for a gin wheel?

3 (l) What is the maximum load you would liftwith a gin wheel?

3 (m) Would you use a gin wheel with no ropeguides?

3 (n) How far along an unbraced cantileveredscaffold tube would you fix a gin wheel?

3 (o) How would you stop a ring-type ginwheel from sliding along the scaffoldtube?

3 (p) Would you suspend a gin wheel from aright angle coupler?

3 (q) What would you do to make safe ahook-type gin wheel with no safetycatch?

SECTION FOUR:GENERAL SCAFFOLD REQUIREMENTS

Note: Select seven questions at randomfrom the following 26. To pass this section,the applicant must correctly answer at leastfour of the selected questions.

4 (a) What is the maximum load in each bayof a light duty working platform?

4 (b) What is the maximum load in each bayof a medium duty working platform?

4 (c) What is the maximum load in each bayof a heavy duty working platform?

4 (d) What maximum load would you place ona right angle coupler?

4 (e) What maximum load would you place anadjustable baseplate?

4 (f) What is the maximum allowable load ona chain?

4 (g) What is the maximum allowable load ona flexible steel wire rope?

4 (h) When a scaffold is built on soil, whatwould you place under the baseplates todistribute the load?

4 (i) What minimum width of timber wouldyou use as a soleplate?

4 (j) Are gaps allowed between the planks ofa working platform?

4 (k) Can platform planks be lapped on thereturns of a scaffold?


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4 (l) What is the minimum width of a lightduty working platform?

4 (m) What is the minimum width of a mediumduty working platform?

4 (n) What is the minimum width of a heavyduty working platform?

4 (o) What is the minimum width of clearaccess along a working platform forpersons with hand tools only?

4 (p) What is the minimum width of clearaccess along a working platform forpersons and materials?

4 (q) Can planks with different thicknesses beused to deck out a working platform?

4 (r) When is edge protection needed onworking platforms?

4 (s) How far above the working platformmust a toeboard extend?

4 (t) At what height above the workingplatform would you fix a guardrail?

4 (u) What must be provided between theguardrail and the toeboard to completea platform's edge protection?

4 (v) What is the maximum gap allowedbetween an unprotected platform edgeand the working face?

4 (w) Is it acceptable to use a personnel hoistas the only means of access to ascaffold's working platforms?

4 (x) What type of ladder cannot be used foraccess to a scaffold?

4 (y) What is the maximum height allowedbetween ladder landings?

4 (z) What is the minimum height an accessladder must extend above the landing?

SECTION FIVE:PARTICULAR SCAFFOLD REQUIREMENTS

Note: Select seven questions at randomfrom the following 26. To pass this section,

the applicant must correctly answer at leastfour of the selected questions.

5 (a) Do castors for mobile scaffolds needwheel locks?

5 (b) Can a castor for a mobile scaffold havea pneumatic tyre?

5 (c) Why is plan bracing needed in a mobilescaffold?

5 (d) What is the minimum platform widthwhen platform brackets are fixedbetween lifts?

5 (e) Would you fix platform brackets on theinside of the scaffold or on the outsideof the scaffold?

5 (f) When platform brackets are fixedbetween lifts, where would you place theextra working platforms?

5 (g) What maximum spacing would you usebetween tank brackets supporting 50mm thickness solid timber scaffoldplanks?

5 (h) What maximum spacing would you usebetween tank brackets supporting 63mm thickness solid timber scaffoldplanks?

5 (i) What would you do to stop the

movement of planks on a crane-liftedshutter bracket scaffold?

5 (j) Should the design of a sheeted scaffoldbe checked by an engineer?

5 (k) Would you use hessian to sheet ascaffold?

5 (l) Does the supplier of prefabricatedscaffolding need to provide writteninformation about the system?


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5 (m) Would you mix components of twoprefabricated systems in the onescaffold without a supplier's orengineer's consent?

5 (n) What maximum horizontal tie spacingwould you use on an unsheetedmodular scaffold?

5 (o) What maximum vertical tie spacingwould you use on an unsheetedmodular scaffold?

5 (p) If you used plan bracing to increase thetie spacings on a prefabricated scaffold,how would you strengthen each tie?

5 (q) If a tie tube was fixed to a wedge-typemodular ledger, how would you fix theledger against uplift?

5 (r) Where would you fix the first lift on amodular scaffold?

5 (s) How many unbraced panels would youallow between the longitudinally bracedpanels of an unsheeted modularscaffold?

5 (t) Where would you fix transverse bracesto a run of unsheeted modular scaffold?

5 (u) What would you attach to a run of framescaffold at the platform level so thatrandom-length scaffold planks can bebutted?

5 (V) How high would you build an unsheetedfree-standing steel frame scaffold?

5 (w) Without supplier's information orengineer's approval, how high wouldyou build a light duty aluminium towerframe scaffold?

5 (x) Would you fix the ladder access to atower frame scaffold internally orexternally?

5 (y) How is the ladder opening in a towerframe scaffold's working platformusually protected?

5 (z) Without supplier's information orengineer's approval, how many workingplatforms would you place on a lightduty aluminium tower frame scaffold?

SECTION SIX:ASSOCIATED EQUIPMENT REQUIREMENTS

Note: Select three questions at randomfrom the following 12. To pass this section,the applicantmust correctly answer at least two of theselected questions.

Applicants who hold a National RiggingCertificate have already been accessed on this

Section and do not require re-assessment.

6 (a) What is the maximum mesh size of asafety net?

6 (b) What maximum gap would you allowbetween the edge of a safety net andthe building or structure?

6 (c) What are the two maximum falldistances which you might find markedon the label of a safety net?

6 (d) What minimum and maximum initial sagwould you allow for a safety net?

6 (e) What minimum clearance would youensure below a safety net?

6 (f) What minimum horizontal distanceshould an outrigged safety net extendpast the outermost working position?

6 (g) What maximum spacing would you usebetween ties along the border chord of asafety net?

6 (h) What is the minimum overun distancebetween the hoist rope attachment andthe head sheave on a cantileveredplatform hoist?

6 (i) What is the minimum and maximumhorizontal clearance between themoving platform of a cantilevered hoist

and any landing or floor?


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6 (j) What is the minimum height of a landinggate for a cantilevered platform hoist?

6 (k) What maximum distance would you usebetween lateral braces of a cantileveredplatform hoist?

6 (l) How high would you free-stand thetower of a cantilevered platform hoistabove its last tie?

END OF QUESTIONS


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Model answers

SECTION ONE:CERTIFICATION

(Reference: Guidelines for Scaffolding)

Question Answer Reference

1 (a) Where a person AS/NZS4576or object could fall Clause 2.7more than 4 m Page 11from the scaffolding.(An answer of `4 mor `more than 4 m, or`2 lifts, or over 2 liftsis acceptable.)

1 (b) No AS/NZS4576Clause 2.7Page 11

1 (c) No AS/NZS4576Clause 2.7Page 11

1 (d) Yes AS/NZS4576Clause 2.7Page 11

1 (e) No AS/NZS4576Clause 2.7Page 11

1 (f) Yes AS/NZS4576Clause 2.7Page 11

1 (g) Yes AS/NZS4576Clause 2.7Page 11

1 (h) No AS/NZS4576Clause 2.7Page 11

1 (i) Yes AS/NZS4576Clause 2.7Page 11


1 (j) No AS/NZS4576

Clause 2.7Page 11

1 (k) Yes AS/NZS4576Clause 2.7Page 11

1 (l) No AS/NZS4576Clause 2.7Page 11

SECTION TWO:SITE HAZARDS


2 (a) 4 m AS/NZS4576Clause 5.4.2Page 18

2 (b) 5.0 m AS/NZS4576Clause 5.4.2Page 19

2 (c) Any one of the AS/NZS4576following: Clause 5.5.2(i) Re-route traffic; Page 19(ii) Provide guards

(or fenders)(iii) Use a person to

direct traffic(or flagman).

2 (d) Crane loads could AS/NZS4576snag the scaffold Clause 5.5.3

(or similar words). Page 19

2 (e) Any one of the AS/NZS4576following: Clause 5.5.6(i) Acids; Page 20(ii) Alkalis; or(iii) Salts


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2 (f) Injury from AS/NZS4576,machinery Clause 5.5.4,operation Page 20

2 (g) Non-conductive AS/NZS4576,material Clause 5.5.7,(or timber) Page 20

SECTION THREE:TOOLS AND EQUIPMENT FORSCAFFOLDING


3 (a) 150 mm Table 7.2,Item 4Page 25

3 (b) 600 mm Table 7.2,Item 4,Page 25

3 (c) 150 mm x 150 mm Table 7.2,(or 225 cm

2) Item 3,

Page 24

3 (d) 48 mm AS/NZS4576,Clause 10.5,Page 63

3 (e) 4 mm AS/NZS4576,Clause 10.5,Page 63

3 (f) 4.45 mm AS/NZS4576,(or 4.4 mm Clause 10.5,or 4.5 mm) Page 63

3 (g) 220 mm (or 225 mm) Table 7.2,Items 7 & 8,Page 25

3 (h) 32 mm Table 10.1,Page 50

3 (i) 38 mm Table 10.1,Page 50


3 (j) 12 mm Clause 3.11,Page 14

3 (k) 16 mm Clause 3.11,Page 14

3 (l) 50 kg Clause 9.13,Page 48

3 (m) No Clause 9.13,Page 47

3 (n) 600 mm Clause 9.13,Page 48

3 (o) Fix a coupler on Clause 9.13,either side Page 47

3 (p) No Clause 9.13,Page 47

3 (q) Mouse the hook Clause 9.13,Page 48

SECTION FOUR:GENERAL SCAFFOLD REQUIREMENTS


4 (a) 225 kg (or 2.2 kN) Table 8.7,Page 33

4 (b) 450 kg (or 4.4 kN) Table 8.7,Page 33

4 (c) 675 kg (or 6.6 kN) Table 8.7,Page 33

4 (d) 630 kg (or 630 kgf Table E3,or 6.25 kN) Page 119

4 (e) 3030 kg (or 30 kN, Table E3,or 3030kgf 3000 kg, Page 119or 3 t are acceptable,approximations.)


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4 (f) one sixth of the Clause 8.12,breaking load Page 44(or breaking strainor breaking force.)

4 (g) one sixth of the Clause 8.11,breaking load Page 41(or breaking strainor breaking force.)

4 (h) Soleplates Clause 8.3,Page 28

4 (i) 220 mm (or 225 mm, Clause 8.3,or the width of a Page 28

sacaffold plank).

4 (j) No Clause 8.7,Page 31

4 (k) Yes Clause 8.7,Page 31

4 (l) 450 mm, Table 8.7,(or 2 planks) Page 33

4 (m) 900 mm, Table 8.7,

(or 4 planks) Page 33

4 (n) 1000 mm, Table 8.7,(or 5 planks) Page 33

4 (o) 450 mm (or 2 planks), Clause 8.7,Page 31

4 (p) 675 mm (or 3 planks), Clause 8.9,Page 36

4 (q) No Clause 8.7,Page 31

4 (r) When a person or Clause 8.8,or object could Page 33fall more than 2 m

4 (s) 150 mm Clause 8.8,Page 34


4 (t) Not less than 900 mm Clause 8.8,and not more than Page 341100 mm (or anyheight between these two)

4 (u) A midrail (or infill, Clause 8.8,or brickguards of Page 3317 mm plywood)

4 (v) Less than 225 mm Clause 8.8,(or 225 mm or less Page 34than the width of ascaffold plank)

4 (w) No Clause 8.9,Page 34

4 (x) Any one of the Clause 8.9,following: Page 36(i) A domestic grade

(or non-industrialgrade ladder)

(ii) An extension ladder(iii) A step ladder

4 (y) 6 m (or 3 lifts) Clause 8.9,

Page 36

4 (z) 900 mm (or 1 m) Clause 8.9,Page 36

SECTION FIVE:PARTICULAR SCAFFOLD REQUIREMENTS


5 (a) Yes Table 7.2,Item 5,Page 25

5 (b) No Table 7.2,Item 5,Page25


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5 (c) To stop the scaffold No specificfrom twisting (or referencedistorting) when it

is moved

5 (d) 450 mm Clause 10.3.5,(or 2 planks) Page 55

5 (e) The inside (or along Clause 10.3.5,side the working Page55face)

5 (f) At the lift immediately Clause 10.3.5,above and the lift Page55immediately below

5 (g) 2 m Table 10.1,Page 50

5 (h) 2.5 m Table 10.1,Page 50

5 (i) Positively fix (or lash, Clause 10.2.3,or strap, or spike) Page 51them

5 (j) Yes Clause 8.10,Page 38

5 (k) No Clause 8.10,Page 38

5 (l) Yes Clause 10.3.3,Page 55

5 (m) No Clause 10.3.5,Page 55

5 (n) 3 bays (or 6 bays Clause 8.5,with plan bracing) Page 28

5 (o) 4 m (or 2 lifts, or Clause 8.5,8 m with ledger Page 28bracing, or 4 liftswith ledger bracing)


5 (p) Fix check couplers Clause 8.5,(or additional Page 28couplers) to thetie tubes

5 (q) Fix a check couplers Clause10.3.6,

(or additional Page 57coupler) overthe wedge

5 (r) At the standards Clause10.3.6,

lowest connection Page 56

points (or at thebase of the standards)

5 (s) 3 Clause10.3.6,

Page 57

5 (t) At each end Clause10.3.6,

(or in each lift Page 57at each end)

5 (u) Ledgers and putlogs Clause10.3.7,

Page 60

5 (v) Three times the least Clause 8.5,base width Page 28

5 (w) 9 m Clause10.3.8,

Page 61

5 (x) Internally (or within Clause10.3.8,

the framework) Page 61coupler) overthe wedge

5 (y) With a trapdoor Clause10.3.8,

(or hinged Page 61hatch)


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5 (z) One Clause 10.3.8,Page 61

SECTION SIX:ASSOCIATED EQUIPMENTREQUIREMENTS

6 (a) 100 mm Appendix F,Clause F2,Page 122

6 (b) 200 mm Appendix F,Clause F3,Page 123

6 (c) 1 m and 6 m Appendix F,Clause F2,Page 122

6 (d) and 1/5 of the Appendix F,shortest side length Clause F3,

Page 123

6 (e) 100 mm Appendix F,2/3 of the shortest Clause F3,side length or 2 m, Page 123

whichever is greater

6 (f) 2/5 of the maximum Appendix F,fall height Clause F3,plus 2 m Page 123

6 (g) 7500 mm Appendix F,Clause F3,Page 123

6 (h) 1.5 m Appendix I,Page 132

6 (i) 25 mm and 100 mm Appendix I,Page 132

6 (j) 1.8 m Appendix I,Figure I1Page 133


6 (k) 6 m Appendix I,Page 132

6 (l) 3 M Appendix I,Page 132

END OF MODEL ANSWERS

LIST OF REFERENCES

The sole direct reference used for thisassessments is:

AS/NZS 4576 Guidelines for Scaffolding

Additional reference is made to AS 1576.3 forthe following questions:

5 (d) to 5 (f);5 (n) to 5 (p); and5 (v)


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Basic ScaffoldingKnowledge Questions



The questions selected at random from the sixsections of the knowledge assessment areintended to assess underlying knowledge whichis required to carry out the four units ofcompetence for Basic Scaffolding prescribed bySchedule A of the National Occupational Healthand Safety Certification Standard for Users andOperators of Industrial Equipment.






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

Section 1: CertificationThese questions reflectperformance criteria 1.1.8 and1.1.13.

Section 2: Site hazardsThese questions reflectperformance criteria 1.1.5, 1.1.8,1.1.9, 1.1.10, 1.1.13, 1.1.14,1.1.16, 2.1.1, 2.1.2, 2.2.1, 2.2.6,3.1.1, 4.2.1 and 4.2.2.

Section 3: Tools and equipment forscaffoldingThese questions reflect

performance criteria 1.1.16, 1.2.1,1.2.2, 1.2.3, 1.2.4, 2.1.3, 2.1.4,2.2.1, 2.2.3, 2.2.4, 2.2.6, 3.1.1,

3.2.2, 3.2.3, 3.2.4, 4.1.2, 4.1.3,4.2.1 and 4.2.2.

Section 4: General scaffold requirementsThese questions reflectperformance criteria 1.1.1, 1.1.2,1.1.3, 1.1.5, 1.1.6, 1.1.7, 1.1.8,1.1.9, 1.1.10, 1.1.12, 1.1.13,1.1.14, 1.1.15, 1.1.16, 2.1.4, 2.2.1,2.2.3, 2.2.4, 2.2.6, 3.1.1, 3.1.2,3.1.3, 3.2.1, 3.2.2, 3.2.3, 3.2.4,

4.1.1, 4.1.2, 4.1.3, 4.2.1 and 4.2.2.

Section 5: Particular scaffoldThese questions reflectperformance criteria 1.1.1, 1.1.2,1.1.3, 1.1.5, 1.1.6, 1.1.7, 1.1.8,1.1.9, 1.1.10, 1.1.12, 1.1.13,1.1.14, 1.1.15, 1.1.16, 2.1.4, 2.2.1,2.2.3, 2.2.4, 2.2.6, 3.1.1, 3.1.2,3.1.3, 3.2.1, 3.2.2, 3.2.3, 3.2.4,4.1.1, 4.1.2, 4.1.3, 4.2.1 and 4.2.2.

Section 6: Associated equipmentrequirementsThese questions reflectperformance criteria 1.1.1, 1.1.3,1.1.4, 1.1.5, 1.1.7, 1.1.8, 1.1.9,1.1.10, 1.1.11, 1.1.12, 1.1.13,1.1.14, 1.1.15, 1.1.16, 1.2.4, 2.1.4,2.2.1, 2.2.3, 2.2.4, 2.2.6, 2.2.7,3.1.1, 3.1.2, 3.2.1, 3.2.2, 3.2.3,3.2.4, 4.1.1, 4.1.2, 4.1.3, 4.2.1 and4.2.2.

THE RANGE STATEMENT

The bank of questions assesses knowledgewhich directly relates to most equipment typeslisted in the National Standard's RangeStatement for Basic Scaffolding. This is asfollows:

prefabricated scaffolds;

cantilevered hoists with maximum WLL notexceeding 500 kg (materials only);

ropes;

gin wheels;

safety nets;


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bracket scaffolds (tank and formwork).

The model answers apply the requirements ofthe National Standard for Plantand its relevantreferenced Standards to the obligations under

State/Territory occupational health and safetylegislation of a person who erects, alters ordismantles scaffolding and associatedequipment within the scope of the BasicScaffolding certificate of competency. Inparticular, the model answers are consistentthe following referenced Standards:

AS 1418, Cranes (Including Hoists andWinches);

AS 1576, Scaffolding;

AS 1577, Scaffold Planks;

AS 1892, Portable Ladders; and BS 3913, Industrial Safety Nets.

The model answers are taken from AS/NZSXXXX, Guidelines for Scaffolding, which theWorksafe Australia Scaffolding and RiggingExpert Working Group has endorsed as asuitable text for the determination of applicants'answers for Basic Scaffolding.

It is intended that a future revision of this

instrument will include questions relating tostatic lines once suitable information has beenincluded in the Guidelines for Scaffolding


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Basic Scaffolding April 1994 54

Assessment standard

! Basic scaffolding

Form of

Assessment

Completed within

allowed time(Yes, No or NA)

Sections Overall result

(C or NYC)

1 2 3 4 5 6

Practical skills

Assignment

Knowledge

C = competentNYC = not yet competent NA = not applicable

Summary

Applicant is: COMPETENT Date: ................................................(circle the result obtained)

NOT YET COMPETENT

Name of ................................................ Name of

assessor ......................... 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 Basic

RI 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, Manager

Mobile:Mobile: 0419 592 4040419 592 404

Freecall:Freecall: 1800 064 9661800 064 966

P.O. Box 1103, Moe Vic. 3825

Fax: (03) 5126 3210

Email: [email protected]

www.worksafetraining.com.au

ABN: 85 066 339 110

Basic Scaffolding - Literature

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