TG4:19 had amendments predominantly in relation to the orientation of ring bolts where current thinking is that settlement is probably greater than side wind loads so reduces potential shear loads on the bolt. Other minor changes were cosmetic. A recent update in April 2019 saw the removal of one reference only when the guidance was reissued as TG4:19.
This guidance gives details of the stress corrosion cracking (SCC) that can occur in certain materials when subjected to tensile stress and specific corrosive environments. Although rare in our industry, it can lead to unexpected sudden failure of certain metals. Whilst chemical environments and alloys are highly specific, this guidance explains the process by which SCC can occur and advises that specialist advice may be needed where SCC is possible or has occurred in the past.
A 32-page, full-colour pocket guide in A6 format. This document summarises clearly the requirements for TG20 compliant scaffolding and offers indispensable guidance to the scaffolding operative on-site. Minimum order of 10 unless you also own the TG20:13 Full Suite. NASC members are entitled to a discount on orders in excess of 100 copies. For more information email email@example.com
An A4 full-colour, brand new, 224-page guide containing detailed practical guidance for most common types of scaffolding supported by structural research and calculation. Guidance is provided for an expanded range of standard structures which includes independent scaffolding, interior birdcages, chimney stack scaffolds, loading bays, ladder-access towers, free-standing towers, lift shaft towers and putlog scaffolding. A range of TG20 ‘compliance sheets’ is included for these structures. (Price shown includes £6 Postage & Packaging)
In an ideal world all working platforms should contain no gaps or holes. This updated guidance is a simplification of the previous 2003 issue regarding working platforms, which have additional requirements over those that are normally provided on an access scaffold. Quality and the thickness of ply used are integral.
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