The NASC’s eagerly-anticipated eGuide scaffolding compliance software update and expansion – TG20:21 – will be launched in March.

TG20 provides the definitive guidance document for scaffolding constructed with tube and fittings throughout the UK. TG20 comprises 4 elements – the Operational Guide, the Design Guide, the User Guide and the NASC’s innovative, user-friendly and widely-adopted eGuide software.

Full details of what will be included in TG20:21 can be found here while an itemised price guide is available here.

Below we explain how existing and new users will be able to access TG20:21 when it goes live.


Existing users of the TG20:13 eGuide

TG20 eGuide users are identified by 16-digit serial numbers allocated at the time of purchase. Existing users can find their serial number by pressing the information i on the eGuide home screen.

Existing TG20 serial numbers will be uploaded to the NASC ePortal Subscription Management system before the launch. Each number will be marked as either an NASC member or not an NASC member, and given a free period depending on the original date of purchase.

One serial number for each NASC full member will be set up as a continuous free subscription, the free subscription will last for as long as they remain an NASC member.

The free periods will start on the date of the launch and will last for 3 months, 9 months or 15 months depending on the user’s original date of purchase.

Users with TG20:13 serial numbers will be able to follow a link to the new Portal and use their existing serial number to register a login.  The name of the business will be already in the system.

To change the business name, users will need to email The registration process will set up a user name, email address, job title and password. The process is designed to be quick and easy.

The link to the new Portal will be publicised on the wind map page of the TG20:13 eGuide and also on the NASC website, social media, e-shots and so on.

Users will be able to continue to use the TG20:13 eGuide while they try out the new Portal version. Users will need to purchase a subscription renewal, via the NASC website shop, in order to continue using their serial number when the free period expires.

Subscription renewals can be bought before the expiry of the previous period, the new subscription period will be started from the end of the previous period.

Initially the NASC website will not be connected to the NASC ePortal so there will be a delay between subscription renewal on the website and activation on the Portal. In time the two systems will be connected so the Portal subscription will be updated automatically immediately following a purchase.

TG20:13 eGuide is built using software which is increasingly difficult to support. The TG20:13 eGuide is likely to be withdrawn before September 2021.


New users

New users will purchase a subscription via the NASC web site shop. The purchase process will capture the business name, contact email address and any NASC membership details.

Initially the NASC web site will not be connected to the NASC Portal so there will be a delay between subscription purchase on the website and activation on the Portal. Purchasers will receive an email telling them when their subscription has been set up and how to log in.

In time the two systems will be connected so the Portal subscription will be added automatically, immediately following a purchase.

NASC video

It's not easy to become an NASC full-contracting member. That's the whole point. This short video explains more.

Click here