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TG20:08 Information

 

NASC Website 
HSE Website

The NASC (National Access and Scaffolding Confederation) issued new guidance in response to BS EN 12811-1:2003, that will impact all tube and fitting scaffold design in the UK. BS EN 12811-1:2003 replaced the obsolete British Standard for tube and fitting scaffolding, BS 5973. TG20:08 provides wide-ranging advice on the construction of tube and fitting scaffolding, together with guidance for design engineers.

 

 The HSE (Health and Safety Executive) states that:

1. Unless a scaffold is a basic configuration described in recognised guidance e.g. NASC Technical Guidance TG20 for tube and fitting scaffolds or manufacturers' guidance for system scaffolds, the scaffold should be designed by calculation, by a competent person, to ensure it will have adequate strength and stability.
2. All scaffolding should be erected, dismantled and altered in accordance with either NASC guidance document SG4 for tube and fitting scaffolds or the manufacturers' erection guide for system scaffolds. 
3. For scaffolds that fall outside the scope of 'Basic Scaffolds' as described in bullet point 1, the design information should describe the sequence and methods to be adopted when erecting, dismantling and altering the scaffold, if this is not covered by published guidance as detailed in bullet point 2.  
4. Any proposed modifications or alterations outside a generally recognised standard configuration should be designed by a competent person.
5. Handover certificates should refer to relevant drawings, permitted working platform loadings and any specific restrictions on use.
  http://www.hse.gov.uk/construction/scaffoldinginfo.htm
 

NASC TG20 1 

TG20:08 is a guide to good practice for tube and fitting scaffolding published by the NASC, the National Access and Scaffolding Confederation. It is based on BS EN 12811-1, which is the British and European standard for tube and fitting scaffold design.TG20:08 defines a range of 'basic scaffolds' for which a structural design has been performed by the NASC, and for which a further design is not required. These standard designs are provided in the form of tables of safe height and tie duty values.
If an independent or putlog scaffold conforms to the TG20 definition of a 'Basic Scaffold' then it does not require a formal structural design if its height is within the safe height provided by TG20:08. The tie duty advises whether light, standard, or heavy duty ties are required, and also advises of cases where extra ties need to be applied. 'SMART Scaffolder check IT performs TG20:08 checks automatically. The 'basic scaffold' checks are performed and if these checks pass then the safe height and required tie duty are calculated.'

 
TG20 check report

The Benefits of TG20:08

  • A larger number of standard scaffold arrangements
  • Direct input and support from the HSE
  • Supported by full scale tests and calculations
  • Greater level of practicality
  • Minimum disruption to scaffolder
  • A standard designation describing scaffolds, aimed at scaffolders and clients
SMART Scaffolder check IT will produce a report that can be printed or saved electronically and used as part of your Health & Safety procedures.
TG20 check report
 

What is a Basic Scaffold?

  • TG20:08 provides guidance for 'basic independent' and 'basic putlog' scaffolds, plus some limited guidance for other types of scaffolding, including towers and loading bays.
  • Safe height and tie duty designs are only provided for independent and putlog scaffolds.
  • TG20:08 provides a checklist of conditions that must be met which are checked by CADS SMART Scaffolder check IT software, in the cases where the scaffolding can be entered into the software, and a drawing produced.
  • Any 'special' scaffolds that cannot be handled directly by SMART Scaffolder should be checked using the guidance in TG20:08.
Working with TG20

CADS produced a guide to the new TG20:08 and how easily you can comply with BS EN 12811-1:2003 using our SMART Scaffolder software. Inside this essential document you can:

  1. Read a clear summary on the new guidance
  2. Define a 'Basic Scaffold'?
  3. Learn how it will impact on your business
  4. View a simple software based approach to TG20:08
  5. Understand how to gain real business advantages
By registering here you will receive this FREE essential guide to TG20:08.

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"As from 1st January 2011 the Health and Safety Executive will no longer acknowledge BS5973:1993 as a recognised standard for the design of tube and fitting scaffolding structures."Philip White, Chief Inspector of Construction, HSE (June2010)

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