1 introducing tg20:13. 2 official launch - 22 nd november 2013 at the nasc agm, bristol ‘a...

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Introducing TG20:13

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Introducing TG20:13 Official launch - 22nd November 2013 at the NASC AGM,

Bristol‘A comprehensive guide to good practice for tube and fitting scaffolding’

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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.

Work at Height Regulations 2005

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HSE Support

‘The Work at Height Regulations 2005 require that strength and stability calculations are carried out for scaffolds unless they conform to a recognised standard…

…HSE is pleased to acknowledge that TG20 has been written by NASC to provide such a standard…’

Heather Bryant, Chief Inspector of ConstructionHealth and Safety Executive

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UKCG Support

‘We applaud and support the work of the NASC which will no doubt result in safer scaffolding…

The UKCG recommend the adoption and standardised use of TG20:13… both within and outside the construction sector.’

Stephen Ratcliffe,Director UK Contractors Group

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TG20 Compliant Scaffolding

TG20 compliant scaffolds have been designed by structural calculation in accordance with BS EN 12811.

Design advice should be sought for any scaffold outside of the scope of TG20 Compliant Scaffolding.

TG20 compliant scaffolds were previously referred to as ‘Basic’ or ‘Standard’ Scaffolds.

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TG20 Compliance Sheets

Demonstrates compliance and that bespoke design is not required.

Typical Scaffolds included in TG20:13 Operational Guide (Chapter 03).

Wider variations included in the TG20 eGuide.

Design advice must be sought for any scaffold outside the scope of a TG20 Compliance Sheet.

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Simplified Wind Classifications Wind exposure affects the maximum

height and tie duty, especially when sheeted or netted.

A simple wind exposure classification illustrated here is used with the TG20 Compliance Sheets (chapter 3)

A more accurate wind analysis is used in the TG20 eGuide, which can result in increased safe heights and reduced tie duties.

Further advice is provided for designers in TG20 Design Guide.

Wind exposure is classified as ‘moderate’, ‘high’ or ‘extreme’

Other factors to be considered are ‘site topography’, ‘seasonal variations’ and ‘wind shielding in cities’

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Compliant Scaffolding Types

Tied Independent Scaffolding

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Compliant Scaffolding Types

Towers

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Interior Access Birdcage Scaffolding

Compliant Scaffolding Types

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Tied Putlog Scaffolding

Compliant Scaffolding Types

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Free-standing Independent Scaffolding

Compliant Scaffolding Types

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Loading Bay

Compliant Scaffolding Types

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Ladder Access Tower

Compliant Scaffolding Types

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Chimney-stack Scaffolding

Compliant Scaffolding Types

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Compliant Scaffolding Features

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Compliant Scaffolding Features Bridging with Beams

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Compliant Scaffolding Features Prefabricated Transom Units

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Compliant Scaffolding Features Light duty protection fans

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Compliant Scaffolding Features Pavement Lifts

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Compliant Scaffolding Features Cantilevered Access Platforms

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Compliant Scaffolding Features Inside Board Bracket Platforms

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Tube TG20 Compliant Scaffolds only

permits the following types of tube to be used:

BS EN 39 type 4 (4mm) galvanised steel tubes or equivalent

High-tensile galvanised steel tubes with a diameter of 48.3mm, thickness of 3.2mm, in accordance with BS EN 10210-1

The following types may not be used without design:

BS EN 39 type 3 steel tubes

Aluminium tubes

Other dimension, material or grade

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Scaffold Boards Platforms constructed from timber boards or decks of other

materials

BS2482 Timber board (softwood)

BS2482 Board (with nail plate option)

LVL Board (Laminated Veneer Lumber)

Composite Plastic Board

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Summary in the TG20:13 article in the Yearbook

NASC Yearbook

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TG20 eGuide Demonstration

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www.nasc.org.uk