Scaffolding Update Including TG20:13 2 years on NEW SG4:15. Ray Johnson BSc Joint Managing Director

Transcription

1 Scaffolding Update Including TG20:13 2 years on NEW SG4:15 Ray Johnson BSc Joint Managing Director

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3 Impact of TG20:13 A new set of guidance, not merely a revision Changes are far reaching, effecting most common scaffolds Most significant change to impact the industry for years

4 Work at Height Regulations 2005 Schedule 3 part 2 additional requirements for scaffolding 7) Strength & stability calculations for scaffolding shall be carried out unless a) A note of calculations, covering the structural arrangements contemplated is available; or, b) It is assembled in conformity with a generally recognised standard configuration. TG20:13 compliance sheet or a bespoke scaffold design meets this criteria

5 Impact of TG20:13 NASC Objectives Expand the scope of standard scaffolds Reflect the needs of today s scaffolding industry Reduce the design burden Improving lead times and remove unnecessary costs Achieve compliance

6 Principal Changes Expanded Scope of Basic Scaffolds To become known as Compliant Scaffolding TG20 Compliance Sheets Chapter 3 common range of scaffolds TG20 e-guide extents the range Revolutionary e-guide software Otherwise scaffold must be designed

7 TG20 Compliance Sheets Demonstrates compliance and that bespoke design is not required. Predicted to become the default addendum document for scaffolding: RAMS Pre-start briefings Handover Inspection Auditing Accident Investigation

8 Principal Changes - Scope Expanded Scope of Compliant Scaffolds, including Tied Independent Scaffolding* Towers Interior Birdcage Scaffolding Tied Putlog Scaffolds* Fee-standing Independent Scaffolds Loading Bays Ladder access towers Chimney Stack Scaffolds *previously covered in TG20:08

9 Principal Changes - Scope Expanded Scope of Scaffolding Features Would have previously required design Referred to now as Add-on features, including Bridging with beams Prefabricated transom units Light-duty protection fans Pavement lifts* Cantilevered access platforms Inside board brackets *previously covered in TG20:08

10 TG20 eguide The purpose of the eguide is to generate TG 20 compliance sheets: These are recognised standard configurations of scaffolding exempt from bespoke design. Several variations of TG 20 compliance sheet are available from the eguide that are not available in the Management Guide. The compliance sheets for independent scaffolding in the Management Guide are suitable for typical scaffolds up to a height of 16m in order to provide straightforward guidance. The TG 20 eguide provides several alternative designs to achieve greater heights including reduced bay lengths, alternative tie configurations and doubled standards.

11 TG20 eguide Demo s?

12 Double Sole Boards Sole boards of a greater thickness or size may be required for: Taller scaffolds (TG20 eguide) Loading Bays; or, Bridged sections depending upon the number of lifts supported. Double 450 x 225mm sole boards (38mm) may be required for TG20 Compliant Loading Bays. Alternatively 450 x 225 x 50mm timber battens may be used. Greater heights for loading bays are specified in the eguide.

13 Foot lifts Also known as a foot tie, base lift, locking lift or kicker lift Not necessary for most TG20 Compliant Independent Scaffolding. TG20 eguide compliance sheets may specify a foot lift for taller scaffolds. A foot tie is also recommended for slopping ground >1 in 10.

14 Excavations, slopes or embankments Scaffolds adjacent to an excavation, edge of a slope or embankment must have the sole board set back from the edge as shown Do not excavate under scaffold foundations, unless the scaffold has been designed to bridge the trench. As a guideline excavations should not be made within 1m of the scaffold foundations, TG20 states a minimum of 300mm. Special consideration needs to be given to ground/trench support by the loads imposed in the ground by the scaffold.

15 Platform widths

16 Lift Heights and Headroom TG20 Compliance Sheets allow lifts of up to 2m Compliant scaffolds are available in the TG20 eguide of up to 3m

17 Cladding

18 Tie duty TG20 Tie Duty (TG20 Table 7.2)

19 Tie Spacing TG20 Tie symbol

20 Tie Spacing Tie frequency examples Second example uses half as many ties. Ties effective over a 32m 2 area. Can only be used where the tie layout is stated at 32m 2 or more. Following TG20 guidance each tie will carry double the tie duty to allow half the ties (Section 7.6)

21 Masonry Anchors - Proof Tests Carried out for all jobs where anchorage systems are used. Tested to 1.25 x the required tensile load (TG20 Table 7.4) Pass Criteria = No significant movement - visual check Minimum of 3 anchors tested per discreet area 5% (1 in 20) of the total job (except brickwork is 10% min) Tests to be spread evenly over the area being considered Identify the ties tested with a tag (including failures)

22 Raker Assemblies

23 Scaffolding Inspection Guidance Jan 2016

24 Foundations

25 Joints in same bay

26 Tie Positions

27 Scaffold Couplers for corner return ties If a corner return is to used as a tie, then ALL guard rails must be connected to the corner standard at every lift with right angle or swivel couplers TG20:13.

28 Scaffold Couplers All guard rails to be fixed with right angle couplers TG20:13 Transom tubes must have a minimum projection of 25mm beyond the couplers - TG20:13 (this photo was on A loading bay).

29 Access to Ladders Head hazard Ladder Ladder access route

30 Ladder Towers

31 Tying Ladders TG20:13 Rope Ladder clamps Zip ties

32 Tying Ladders

33 Ladder Faults Damaged ladder rungs

34 Boarded Platforms TG20:13 States Max gap in platform is 25mm, (50mm between main & inside Platforms) Boards less than 2.13m long to be fixed down to prevent movement

35 Internal Fall Risks

36 Beams and Bridging Check that beams fixed in as compliance Sheet or scaffold design.

37 Check that scaffold conforms to design!

38 Hazards and Solutions

39 Hazards and Solutions Inner standards not level with Platform or min 1 metre above

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41 TG20:13 2 years on, where are we NOW? q All NASC member companies have full copy of TG20:13 q Most Major Construction Companies are aware of TG20:13, but this does not go down to site level in some cases q Smaller Scaffold Companies more likely to have NOT to have TG20:13 q HSE fully committed to TG20:13 and have given prohibition notices for not having TG20:13 compliance sheet or design q Compliance sheets are not finding there way down to Scaffolders on site q Misunderstanding on need for compliance sheet or design on every job q Not insisting on design when needed (eg: edge protection BS13374) q Not checking that scaffold is erected to compliance sheet or design.

42 NASC SG4:15 Preventing Falls in Scaffolding Operations FREE DOWNLOAD OF SG4:15 FROM NASC Once on page click to download

43 WAHR - Hierarchy AVOID qavoid WAH? PREVENT qmost suitable method of working and equipment to prevent falls MITIGATE COLLECTIVE OVER PERSONAL qboth the consequences and distance of a potential fall must be minimised qat all stages you must consider COLLECTIVE protection over PERSONAL protection

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46 Background q Positive effect of SG4 so far. q Injuries to Scaffolders as a result of falls has significantly reduced following the publication of SG4 in the mid 1990 s and revisions in 2000, 2005, 2010 and now q Since 2000 there has been a 78% reduction in the number of reported falls involving Scaffolders despite an increase in numbers of operatives of 29% working for NASC members, this equates to a 82% reduction in accident frequency in the period. q From 2006/07 to 2014/15 there has been 461 fatal accidents in the Construction industry of which 15 were Scaffolders of which only 1 was working for a NASC member company.

47 NASC SG4:15 Preventing Falls in Scaffolding Operations

48 Practical Applications Avoiding Work at Height & Preventing Falls

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52 Collective Fall Arrest examples

53 What is a Scaffolders Safe Zone q A Scaffolders Safe Zone is a position of work where suitable edge protection and a platform exists. q A Scaffolders Safe Zone can be achieved using several methods, including progressive work platforms, systems of work, use of powered access and proprietary collective fall prevention systems

54 How to create a Scaffolders Safe Zone q Scaffolders Safe Zone Use of Powered Access

55 Slung Scaffold the wrong way!...

56 What is the Scaffolders safe zone q A fully boarded and correctly supported platform without gaps where someone could fall; and, q A single main guardrail (950mm above platform) where there is a risk of fall (inside edge, window openings & stop ends) to remain in place on all lifts ready for dismantle q When within 1m of unprotected edge Scaffolders are considered at risk and personal fall arrest equipment must be used

57 What is a Scaffolders Safe Zone?...

58 How to create a Scaffolders Safe Zone q Scaffolders Safe Zone Proprietary Systems

59 How to create a Scaffolders Safe Zone? q Scaffolders Safe Zone Proprietary Step System q Must be clipped on!...

60 Push Type Advance Guardrail qthis push up type AGS utilises special couplers that allows scaffold tube guardrails to be erected from below and pushed up into position with a locating tool

61 Scaffolders Safe Zone - Short lifts

62 Scaffolders Safe Zone - Tall lifts

63 Scaffolders Safe Zone System Scaffolding Short lift in system tower scaffold

64 Scaffolders not working to SG4

65 Show Lyndon Scaffstep DVD

66 Questions? qcontacts qsafety and Access Ltd Nottingham Humberside Also in Middle East and South Korea qwww.safetyaccess.co.uk qray Johnson (Joint Managing Director)..