TG20 explained: record TG30 compliance downloads and the NASC AI assistant that is driving them

The National Access and Scaffolding Confederation has reported that TG30 compliance sheet downloads have reached record levels, according to a notice published on its website on 19 August 2026 ^[1]. The announcement arrived within days of NASC and CISRS rolling out a new AI-powered guidance assistant, confirmed by both NASC and trade press ^[2][3], giving the sector's two most used compliance tools a significant visibility boost at a time when CITB grant cuts are pushing more firms to self-fund training and prove competence through documentation rather than course attendance alone ^[4].

What happened: record downloads and a new AI guidance tool

NASC confirmed on 19 August 2026 that downloads of TG30 compliance sheets had hit an all-time high ^[1]. TG30 is the NASC guidance suite dedicated to the safe design, supply and compliance of system scaffolding; it comprises an Operational Guide, a Design Guide and an eGuide for generating compliance sheets, all accessible through the NASC ePortal ^[5][6].

The record figure followed NASC's launch, approximately two weeks earlier, of an AI-powered assistant available to NASC members and approved CISRS Centres ^[2]. The tool allows users to ask questions in plain language and draws exclusively from NASC and CISRS material, including member-only guidance not available to the general public ^[3]. Answers direct users back to the original source document so the guidance can be checked directly ^[3]. The assistant covers TG20, SG4, technical standards, health and safety, training, competence and CISRS requirements ^[7].

NASC's Head of Technical, Mark Collinson, said the tool addresses a long-standing practical difficulty: knowing which document holds a specific answer, particularly for smaller businesses without a dedicated technical resource ^[2]. He described the assistant as a route into the guidance rather than a replacement for reading it ^[2].

TG30 itself received a significant update in May 2026 when NASC added five new birdcage configurations for cup, wedge and rosette system scaffolds, covering setups that had not previously been available through TG30 or manufacturer user manuals ^[8]. Collinson noted at the time that bespoke design had been the only option for those configurations previously, adding time and cost to projects ^[8]. The Operational Guide was updated in parallel to give contractors practical guidance alongside the new compliance sheets ^[8].

Two readings: industry confidence or compliance pressure?

One reading of the download spike is straightforwardly positive. The Construction (Design and Management) Regulations 2015 require clients, principal contractors and contractors to ensure those they appoint have the necessary skills, knowledge, experience and organisational capability to carry out work safely ^[9]. A TG30 compliance sheet is a concrete, auditable demonstration of that standard being met. Rising downloads may simply reflect a maturing market where more firms are documenting compliance correctly.

A second reading points to external pressure. CITB introduced sweeping changes to its grant and funding programmes from 8 January 2026, withdrawing short-course training grants except for a limited number of specialist categories, including scaffolding and plant operations ^[4][10]. Attendance grants for long qualifications were removed, and the achievement grant for qualifications at Level 7 was capped at £600 for eligible cohorts ^[10]. CITB's chief executive acknowledged the changes had been disruptive, attributing them to a 36 per cent rise in demand against a static levy rate ^[11]. With grant support narrowed, some firms may be spending less time on courses and more time ensuring the technical documentation they already hold is correctly applied and accessible, driving greater use of the ePortal. Both readings can co-exist; the data does not distinguish between them.

It is also worth noting that NASC membership itself reached 923 organisations by the end of 2025, an 11 per cent increase year on year ^[12]. A larger membership base using the same compliance tools would, on its own, produce higher download volumes without implying any change in individual firm behaviour.

Why this is a contractual question, not only a technical one

TG20 and TG30 compliance sheets are not merely technical documents. The NASC ePortal compliance sheet notice makes clear that producing a compliance sheet does not, in itself, confer NASC membership, and where a contractor is not an NASC member, there is no independent assurance of equivalent standards ^[9]. For commercial managers and quantity surveyors reviewing subcontractor submissions, this distinction matters: a compliance sheet demonstrates that the scaffold configuration meets a recognised standard, but it says nothing about whether the erecting firm is independently audited.

Under frameworks and public sector contracts, the difference is becoming more visible. The recently closed Efficiency East Midlands scaffolding framework, valued at an estimated £207 million, required that bidding suppliers employ scaffolders with all relevant CISRS qualifications and recommended NASC membership ^[13]. Closer scrutiny of compliance documentation at tender stage is consistent with the record download volumes: more firms are producing the paperwork because more clients are asking for it.

For scaffolding managers responsible for handover packs, scaffold inspection registers and design records, understanding what TG20 and TG30 cover, and where each one applies, is part of day-to-day contract administration. TG20 covers tube and fitting scaffolds; TG30 covers system scaffolding ^[5][6]. Where a configuration falls outside the scope of either compliance sheet, a bespoke design with calculations from a competent scaffold designer is required, as set out in NASC guidance TG21 and CG6 ^[14]. The pillar guide on CISRS progression at ScaffSkills covers how these technical competence requirements interact with career development for supervisors moving towards a contracts management role.

Separately, the NASC and CISRS digital infrastructure rebuilt since January 2026 now stores CISRS card details, membership status, ePortal subscriptions and CPD records in a single, unified platform ^[15]. That integration is what made the AI assistant possible: the tool draws on a knowledge base that is both comprehensive and consistently maintained ^[15].

What a scaffolding manager should check now

The record download figure and the AI assistant launch together signal that the industry's use of NASC technical guidance is accelerating. Three practical checks follow from that.

Guidance has always existed; what changes is how quickly it can be found, applied and demonstrated when a contract demands proof.