TG20:13 update
September 2014
Introduction
• The NASC is continuing to improve
TG20:13, the comprehensive guide
to good practice for tube and fitting
scaffolding
• The first update to TG20, TG20:13
Supplement 1, launched in
September 2014
• It is accompanied by an update to
the TG20:13 eGuide, version 1.1,
now available for download from
the NASC website
What’s new?
• A specification for TG20:13 compliant
cold-formed high tensile steel tubes
in TG20:13 Supplement 1
• TG20 compliance sheets for coldformed high tensile steel tubes in the
new TG20 eGuide
• TG20 compliance sheets for sheeted
scaffolds with transom units
• Several minor enhancements to
TG20 compliance sheets
High tensile tubes
• TG20:13 provides a definition for TG20
compliant 3.2mm wall thickness hightensile steel tubes to BS EN 10210-1
• These tubes are manufactured by a hotrolling process and offer performance
comparable to type 4 steel tubes
• However, many 3.2mm high-tensile tubes
used in the UK scaffolding industry are
manufactured with a cold-formed
process
• Although these tubes have a higher
bending capacity than type 4 steel tubes,
they did not comply with TG20:13
because they have a lower axial load
capacity due to their reduced thickness
High tensile tubes
• TG20:13 has now been extended
to support these tubes
• The required tube specification is
defined in TG20:13 Supplement 1
• New TG20 compliance sheets are
available for tubes of this
specification from the new TG20
eGuide
High tensile tubes
• TG20 compliance sheets for cold-formed high-tensile steel tubes are printed
from the new version of the TG20:13 eGuide with this new option:
Transom units
• TG20 compliance sheets are now
available for sheeted scaffolds
constructed with TG20 compliant
prefabricated structural transom units
• Compliance sheets are available for
tied independent scaffolds and tied
towers
• Printed from the new TG20 eGuide
• Guidance is provided in TG20:13
Supplement 1
Compliance sheet enhancements
• Some minor enhancements have
been made to the TG20 compliance
sheets from the new eGuide based on
feedback
• A new note that ‘illustrations are
indicative’ – the compliance sheet
illustrations are not dimensioned
design drawings
• Specific compliance sheets for
scaffolds which are 2.0m, 3.0m or
4.0m tall
• Minor clarifications to the wording for
scaffolds tied to the inner face only
Compatibility
• The NASC recommends that the
latest TG20 compliance sheets
from the new eGuide are always
used
• However, this update to TG20 has
been designed such that
compliance sheets from the original
eGuide (and from the TG20:13
Operational Guide) are still valid
• There is no need to differentiate
between new and original
compliance sheets on site
Software download
• Version 1.1 of the TG20:13 eGuide
is available as a free software
update
• Available for Windows, Mac and
Android devices
• Download from the NASC website
• TG20:13 Supplement 1 is available
for download as a PDF
http://www.nasc.org.uk/tg20_13/tg20_13_supplement_1_and_eguide_update
Thank you
Questions?