jhg-2-002-3 temporary work design rev 5 (230810)

8/6/2019 JHG-2-002-3 Temporary Work Design Rev 5 (230810)

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JOHN HOLLAND GROUP PROCEDURE

TEMPORARY WORK DESIGNAuthorised by:

Jeff Horsley

JHG-2-002-3* Sponsor:Justin Lee

Revision No: 5 Page 1 of 6Issue Date: August 2010

DISTRIBUTION

There are no restrictions on the distribution/circulation of this procedure within the Group.

SYNOPSIS

This procedure details requirements for the design of temporary works where there is a risk ofinjury to personnel and/or property/equipment should failure occur. This procedure iscomplimentary to the Design Management Manual and is applicable to smaller projects.

CONTENTS

1.0 Definitions/References2.0 Key Risks/Issues3.0 Temporary Works Design - Responsibilities4.0 Procedure

4.1 General4.2 Type of Temporary Works Design4.3 Nomination of Designer/Verifier4.4 Design Control4.5 Records

1.0 DEFINITIONS/REFERENCES

Definitions for design are in Appendix 1 of the Design Management Manual

Procedures

JHG-0-009 - Design Management Manual

Appendices

JHG-2A-02-3A - John Holland Calculation Sheet

2.0 KEY RISKS AND ISSUES

No. Risks/Issues Risk Mitigating Actions Outcomes (positive)1. Design is difficult to

construct.Have experienced constructionpersonnel review design and considertemporary works required.

Designs considerconstructability and areeconomical to construct.

2. Construction is difficultand dangerous.

Temporary works designs considerconstructability and eliminate hazards.

Fast, safe, efficientconstruction.


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TEMPORARY WORK DESIGN

JHG-2-002-3*

Revision No: 5Issue Date: August 2010

3.0 TEMPORARY WORKS DESIGN - RESPONSIBILITIES

Implementation of this procedure in all projects is a line management responsibility. Specific responsibilities within th

Activity DescriptionLEGEND

P = Direct responsibility for leading or performing the task.S = Provides assistance and support to the person directly performing the task.

Accountabil

P r o

j e c

t M a n a g e r

D e s

i g n e r

V e r i

f i e r

1. Legal liability for ensuring temporary works are adequately designed in conformity withrelevant codes and regulations P

2. At the commencement of a project, identify the type of temporary works required andnominate responsible person (s) to undertake the design and verification required P

3. Any temporary works not listed in table shall be performed by a person qualified in thediscipline area and be verified P

4. Nominate Designer/Verifier P

5. Prior to starting temporary works design ensure inputs are clearly defined/referenced anddocumented P

6. All temporary works design data/computations shall be clearly documented and signed off by

the designerP

7. Upon completion of the design, data/computations to be forwarded to the nominated verifierfor review. P

8. Data/computations reviewed and any discrepancies arising from the review shall bediscussed/resolved with the designer. P

9. Upon completion of verification, initial the documentation as verified/checked P


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TEMPORARY WORK DESIGN

JHG-2-002-3*

Revision No: 5Issue Date: August 2010

Activity DescriptionLEGEND

P = Direct responsibility for leading or performing the task.S = Provides assistance and support to the person directly performing the task.

Accountabil

P r o

j e c

t M a n a g e r

D e s

i g n e r

V e r i

f i e r

10. Nominate a suitably qualified person to validate that the temporary works have beenconstructed in accordance with design documentation. P

11. At the completion of each inspection, provide an inspection report to the Project Manager P

12. Review report and initiate action(s) to rectify issues highlighted in the report P

13. At the completion of the temporary works construction confirm in writing that the works havebeen constructed to design documentation.

14. A copy of the data/computations shall be maintained in the Temporary Works Design file. P P

15. Where documents are required to be submitted to the client for acceptance, ensure copy issent to Clients Representative with a covering letter P


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Jeff Horsley



4.0 PROCEDURE

4.1 General

All Project Managers have a legal liability for ensuring temporary works are adequatelydesigned in conformity with relevant codes and regulations.

4.2 Type of Temporary Works Design

4.2.1 At the commencement of a project the Project Manager shall identify the type oftemporary works required and nominate responsible person (s) to undertake the design

and verification required, taking into account the nominee's experience.

4.2.2 The following table provides a guide as to the experience required of the designer andverifier in their respective discipline:

ITEM TYPE OF TEMPORARY WORKS EXPERIENCE REQUIRED

Designer Verifier1 All elevated concrete formwork 5 years 5 years2 Precast handling (lifting and restraint) and storage 5 years 5 years3 Floating plant / marine operations 5 years 5 years4 Major falsework 5 years 5 years5 Geotechnical stability and temporary shoring 5 years 5 years6 Staged loading stability 5 years 3 years7 Temporary electrics 3 years 5 years8 Special temporary works and hoisting equipment 5 years 5 years9 Crane Lift Analysis 5 years 5 years

4.2.3 Any temporary works not listed above shall be performed by a person qualified in thediscipline area and be verified by the Project Manager or his nominee.

4.3 Nomination of Designer/Verifier

4.3.1 Design or verification of temporary works shall be performed by either project personnelor an external consultant nominated by the Project Manager. The Project Manager shalltake into consideration the following when nominating the designer and verifier:- the complexity and type of temporary work being designed and verified;- the qualifications and experience of the nominee;- professional indemnity insurance implications.

4.4 Design Control

4.4.1 Preparation

4.4.1.1 Prior to starting temporary works design, the designer shall ensure that the followinginputs are clearly defined/referenced and documented:


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Jeff Horsley



- Load requirements;- Statutory or Regulatory requirements;- Standards/Codes;- Client requirements such as specific tolerances or access times.

4.4.2 Documenting the Design

4.4.2.1 All temporary works design data/computations shall be clearly documented on either thestandard John Holland Calculation sheet see Appendix 2A-02-3A (or consultantdocumentation) or computerised printouts and be signed off by the designer. Thesheets/printouts shall be uniquely identified, e.g.:

TWD / S123 / 001

(Temporary Works Design) (Project/Job No) (Sequential number)

4.4.2.2 The sheets/printouts shall be individually numbered, e.g. "Page 1 of 2".

4.4.3 Verification of Design Outputs

4.4.3.1 Upon completion of the design, the designer shall forward the data/computations to thenominated verifier for review. The verifier shall review the data/computations for thefollowing:

- assumptions are in accordance with the Codes and regulatory and Clientrequirements;

- loading requirements comply with specifications and Codes;- calculations/sketches are clearly defined and correct;- temporary works design incorporates features required and is safe for the proposed

construction methodology;- safety, quality and environmental risks associated with the temporary works design

both during the construction and operational phases;- tolerances clearly defined, where applicable;- equipment/materials/plant are clearly defined.

4.4.3.2 Any discrepancies or queries arising from the review shall be marked up by the verifierand discussed/resolved with the designer. Upon completion of verification the verifiershall initial the documentation as verified/checked.

4.4.3.3 Changes to temporary works design after the design has been approved shall beperformed as per JHG-2-002-4 'Design Change'.

4.4.4 Design Validation of Temporary Works

4.4.4.1 The Project Manager shall nominate a suitably qualified person to validate that thetemporary works have been constructed in accordance with design documentation. A

schedule of inspections covering the various stages of constructing the temporary worksshall be agreed between the Project Manager and the Validator. The validation processincludes reviewing test results, specifications, checking calculations and conducting siteinspections as the temporary works are being constructed.


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Jeff Horsley



4.4.4.2 At the completion of each inspection, the Validator shall provide an inspection report tothe Project Manager. The Project Manager or his/her nominee shall review the reportand initiate action(s) to rectify issues highlighted in the report. At the completion of thetemporary works construction the Validator shall confirm in writing that the works havebeen constructed to design documentation.

4.5 Records

4.5.1 A copy of the data/computations shall be maintained by the Project Manager /Designer inthe Temporary Works Design file. Where such documents are required to be submitted

to the Client for acceptance, the Project Manager shall ensure that a copy is sent to theClient's Representative with a covering letter.

jhg-2-002-3 temporary work design rev 5 (230810)

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