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.
The TG20:13 Operational Guide has now been withdrawn from sale as we enter the transition period to TG20:21. The TG20:21 Operational Guide is available electronically via the NASC ePortal TG20:21 subscription. Printed copies will be available later in 2021, to holders of NASC ePortal TG20:21 subscriptions.
The TG20 Operational Guide contains detailed practical guidance for most common types of scaffolding, supported by structural research and calculation. Guidance is provided for a range of standard structures which includes independent scaffolding, interior birdcages, chimney stack scaffolds, loading bays, ladder-access towers, free-standing towers, lift shaft towers, putlog scaffolding, exterior birdcages, tube and fitting mobile towers, tube and fitting loading bays without beams, and tied independent scaffolds with three inside boards.
For further information about TG20:21 click here.
This guidance explains the differences between ‘supplementary’ and ‘check’ couplers and gives typical design applications where high coupler forces could be expected and where additional loadbearing capacity to connections may be required. It also contains guidance on coupler configurations and expected safe working loads (SWLs) where supplementary couplers are used. To ensure that SWL values are as accurate as possible, data provided within this document is based on practical testing rather than calculation.
Updated 2015 version is a change of date only. Scaffold board nail plates are specially stamped toothed strips of galvanised steel that can be used to help prevent scaffold boards developing splits, or in repairing scaffold boards that have split. This guidance gives details on the manufacture and installation of Nail Plates.
This guidance gives details of various products available which will satisfactorily hold down scaffold boards to prevent movement. Users should satisfy themselves that any proprietary system meets their requirements.
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