£5.15
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.
2 pages
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. 24 pages
Traditionally, flame retardant timber decking has long been a fundamental requirement for scaffolding in various sectors of the industry. However, in the light of the ‘Grenfell’ disaster, there has been a substantial increase in the number of contracts which specify the need for flame retardant scaffold boards. This document gives details of various fire retardant treatments available, the recommended specification and guidance for care and storage. This guidance is available for pdf download only. 2 pages.
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. This guidance is available for pdf download only.
Please note - this guide is on back order as of 31 July 2024. We are waiting for a reprint and will send them out ASAP. 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. NASC members can purchase 10 or more copies of the TG20:21 Operational Guide book at the discounted rate of £25 per unit. To do so, please email sales@nasc.org.uk
Please enter a postcode to search for a member:
Please complete the fields below:
