TOOLBOX TALK 026 TEMPORARY SUPPORT STRUCTURES Created 4092020

TOOLBOX TALK 026 TEMPORARY SUPPORT STRUCTURES Created 4/09/2020; Rev 0 Toolbox Talk 026 – Temporary Support Structures 1

Training Objectives • Outline the requirements of Austral procedure SP 21 -24 Structural Support Systems. – – – Design Installation Inspection prior to and during use by a competent person Dismantling Emergency Response Created 4/09/2020; Rev 0 Toolbox Talk 026 – Temporary Support Structures 2

Types of Temporary Support Structures • • • Temporary Load-Out Facility (TLO) Swing-stage Scaffold Crows Nest Platform and other temporary access platforms Scaffold Formwork Falsework Shoring Panel Bracing Temporary Edge Protection Propping Created 4/09/2020; Rev 0 Toolbox Talk 026 – Temporary Support Structures 3

Types of Temporary Support Structures Created 4/09/2020; Rev 0 Toolbox Talk 026 – Temporary Support Structures 4

Design & Planning All structural support systems and temporary structures must be designed by a qualified Design Engineer. During the design process, the following items shall be considered: • Methods for erection and dismantling of structural support systems and temporary structures; • Means of access to the structure (ladder, EWP, work box, boat); • prevention of persons falling; • management of potential falling objects; and • management of penetrations and openings. Created 4/09/2020; Rev 0 Toolbox Talk 026 – Temporary Support Structures 5

Scaffold Plan On Rio Tinto projects, all scaffolds require a Scaffold Plan. The scaffold plan should address the following items: • Basis of design. • Foundations (including ground conditions and loadings). • Supporting structure. • Access and egress. • Tying into structures. • Bracing. • Type of scaffold. • Edge protection, and • Anchor points. Created 4/09/2020; Rev 0 Toolbox Talk 026 – Temporary Support Structures 6

Assessment of the Supporting Structure Before the installation of any structural support systems and temporary structures, Austral shall ensure that assessments are made on the structure/material/foundation to ensure that structural alterations or installation of temporary structures can be safely carried out. Created 4/09/2020; Rev 0 Toolbox Talk 026 – Temporary Support Structures 7

Installation Type of Support Structures Installed by Competent Person Structural support systems (other than Licensed Scaffolder or Rigger (HRWL) scaffolds & swing stage scaffolds) Scaffolds Licensed Scaffolder (HRWL) Swing-stage scaffolds Advanced Scaffolder or Advanced Rigger (HRWL) Created 4/09/2020; Rev 0 Toolbox Talk 026 – Temporary Support Structures 8

Installation of Clamp Platforms A specific checklist has been developed for the installation of any temporary works clamp platforms. These are specific to clamp platforms and are to be completed during installation. Created 4/09/2020; Rev 0 Toolbox Talk 026 – Temporary Support Structures 9

Inspection Type of Support Structure Inspected by Competent Person Structural support systems (other than scaffolds & swing stage scaffolds) Licensed Scaffolder or Rigger After completion & every 30 days thereafter Degree in Engineering (Civil or Structural) After completion (Handover) Licensed Scaffolder After completion (Handover) Scafftag Licensed Scaffolder Monthly (Weekly on RTIO sites) Scafftag Scaffolds Frequency After completion (Handover) Swing-stage scaffolds Advanced Scaffolder or Advanced Rigger Daily 30 days All structural support systems Competent person listed above Created 4/09/2020; Rev 0 After an incident related to SSS Inspection Records Required Structural Support System Inspection Checklist (form SP 21 -24 -A) Certificate of Compliance – Structural Support System (form SP 21 -24 -B) ® ® Swing-Stage Scaffold Installation Checklist (form SOP 43 -B) Swing-Stage Scaffold Daily Pre-Use Checklist (form SOP 43 -C) Swing-Stage Scaffold Register (form SOP 43 -A) Inspection records listed above for SSS (other than scaffold & swing stage scaffold), scaffold & swing stage scaffold Toolbox Talk 026 – Temporary Support Structures 10

Inspection Structural Support System Inspection Checklist (form SP 21 -24 -A) Created 4/09/2020; Rev 0 Certificate of Compliance – Structural Support System (form SP 21 -24 -B) Toolbox Talk 026 – Temporary Support Structures 11

Access and Use You must not access a temporary support structure unless it has been signed off by a rigger or scaffolder and the Engineer. Always confirm that a temporary support structure has been signed off and approved for use before accessing. Ensure that the means of accessing the structure is also considered in risk assessments, e. g. JHA or SWP. Specific controls must be in place if transferring from an EWP etc. • No more than 100 mm gap between EWP basket and structure • The ground level controls of the EWP are to be tagged 'Equipment in use - Do not operate. ' Created 4/09/2020; Rev 0 Toolbox Talk 026 – Temporary Support Structures 12

Access and Use • Example of good to go signage Created 4/09/2020; Rev 0 Toolbox Talk 026 – Temporary Support Structures 13

Dismantling The JHA or SWP shall also consider the method and risks involved with dismantling or removing the Temporary Support Structure and ensure that additional hazards are not introduced once the structure is removed. Created 4/09/2020; Rev 0 Toolbox Talk 026 – Temporary Support Structures 14

Emergency Procedures are established for any work on structural support systems and temporary structures. Emergency Procedures shall consider: • the rescue of a worker who: – has fallen from a temporary support structure whilst working at height, – is injured whilst working on a temporary support structure, • the means to access the temporary support structure via the use of one or a combination of rescue equipment such as a boom lift (EWP), or a work box hoisted by a crane, or a workboat (for a marine rescue), • first aid provision and, • the identification of emergency medical facilities and means of contacting emergency services. Created 4/09/2020; Rev 0 Toolbox Talk 026 – Temporary Support Structures 15

Questions? Created 4/09/2020; Rev 0 Toolbox Talk 026 – Temporary Support Structures 16