When we look at a finished skyscraper or a new bridge, we tend to marvel at the glass, the steel, and the architectural finesse. What we rarely see is the complex web of temporary structures that allowed that permanent building to exist in the first place. This is the world of temporary works, and at the heart of this world sits the Temporary Works Coordinator. It is a role that often goes unnoticed by the public, yet it is arguably one of the most critical positions for ensuring that everyone on a construction site goes home safely at the end of the day.

Temporary works include everything from the scaffolding that clings to the side of a building to the massive excavations and the props holding up a ceiling while a wall is removed. If these temporary structures fail, the consequences are almost always catastrophic. That is why the industry relies on a structured management system, governed by British Standards like BS 5975, to ensure that these elements are designed, installed, and dismantled with absolute precision.

What does a Temporary Works Coordinator actually do

The title might sound like it is all about administrative filing, but the reality is far more hands-on and high-stakes. A Temporary Works Coordinator (TWC) is responsible for the entire lifecycle of temporary works on a site. They act as the central point of communication between the permanent works designers, the temporary works designers, and the site team carrying out the physical labour.

One of their primary tasks is to maintain the Temporary Works Register. This is a live document that lists every single piece of temporary works on a project, from a simple fence to a complex cofferdam. The TWC ensures that each item is categorised by its level of risk. They then ensure that an appropriate design is created and, crucially, that this design is independently checked before any work begins. It is about creating a fail-safe environment where nothing is left to chance or ‘gut feeling’.

Key responsibilities on a daily basis

While every site is different, the core duties of the role remain consistent. A TWC must be organised, authoritative, and technically minded. Their day-to-day tasks often include:

• Coordinating all temporary works activities to ensure they don’t clash with permanent structures or other site operations.
• Ensuring that a formal Temporary Works Design Brief is prepared for each element.
• Liaising with the Temporary Works Designer to ensure the solution is practical for the specific site conditions.
• Supervising the ‘Permit to Load’ and ‘Permit to Unload’ process, which acts as the final safety gate before a structure is put into use.
• Ensuring that all materials used for temporary works are of the correct quality and haven’t been damaged or degraded.
• Managing the Temporary Works Supervisors (TWS) who may be overseeing specific parts of the project.

 

The importance of the Permit to Load system

If you ask any experienced Temporary Works Coordinator what the most stressful part of their job is, they will likely mention the Permit to Load. This is a formal document signed by the TWC that gives the green light for a temporary structure to be used. For example, before concrete is poured into formwork, the TWC must inspect the setup against the approved drawings. They are checking that every bolt is tight, every prop is vertical, and every brace is in the right position.

This system exists because many site accidents occur because someone assumed a structure was ready when it wasn’t. By having one person—the TWC—accountable for that final signature, it forces a culture of rigour. It ensures that no one takes shortcuts in the name of the project programme. Once the temporary works are no longer needed, the TWC then issues a ‘Permit to Unload’ or a ‘Permit to Dismantle’, ensuring the structure is taken down in a sequence that doesn’t jeopardise the stability of the new permanent building.

Why this role became a legal and safety standard

The construction industry didn’t always have such a strict focus on this role. The shift largely came after several high-profile and tragic structural failures in the mid-20th century. The Bragg Report, published in the 1970s following the collapse of the Loddon Bridge falsework, specifically recommended that an individual should be appointed on every site to take responsibility for temporary works. This recommendation eventually formed the basis of BS 5975, which remains the ‘bible’ for temporary works management in the UK today.

Under the Construction (Design and Management) Regulations 2015 (CDM 2015), there is a legal requirement to ensure that all work is planned and managed safely. While the regulations don’t use the specific term ‘Temporary Works Coordinator’, the industry recognises this role as the primary way to meet those legal obligations. For a principal contractor, appointing a competent TWC is not just a ‘nice to have’—it is a fundamental part of their risk management strategy.

The qualities that make a great coordinator

It is a common misconception that you need to be a chartered structural engineer to be a TWC. While technical knowledge is vital, the role is as much about management and communication as it is about physics. A great coordinator needs to be able to stand their ground. If a site manager is pushing to start a pour because the concrete trucks are waiting, but the TWC isn’t happy with the bracing, the TWC must have the authority and the confidence to say ‘no’.

• Attention to detail: Spotting a missing pin in a scaffold tower or a slight lean in a trench box.
• Communication: Explaining complex design requirements to subcontractors who may have ‘done it this way for thirty years’.
• Risk awareness: Understanding that site conditions, like heavy rain or shifting ground, can change the safety of a temporary structure in hours.
• Organisation: Keeping a meticulous register and ensuring all design checks are filed and accessible for audits.

Training and proving competency

Because the stakes are so high, you cannot simply step into this role without the right background and training. Competency is defined as a mix of skills, knowledge, training, and experience. Most major contractors require their coordinators to have completed a CITB-recognised training course. These courses dive deep into the legal requirements, the procedural requirements of BS 5975, and the practicalities of managing various types of temporary works.

However, the certificate is just the beginning. A TWC must also have relevant experience on site. They need to understand how things are built and where things typically go wrong. Many people move into this role from a background in site engineering, site management, or from a specialised trade like scaffolding or formwork. The key is having a broad enough understanding to recognise when a situation requires a specialist designer’s input. Knowing what you don’t know is often the most important skill a TWC can possess.

Managing the transition to permanent works

One of the trickiest parts of the job is the interface between the temporary and the permanent. For instance, when a new basement is being dug, the temporary shoring must hold back the earth until the permanent concrete walls are strong enough to take the pressure. The TWC must coordinate with the permanent works designer to understand exactly when that ‘strength’ is reached. This often involves reviewing concrete cube test results to ensure the material has cured sufficiently before the temporary props are removed.

This coordination prevents ‘built-in’ stresses that could damage the building in the long term. It is a delicate dance of timing and engineering. Without a dedicated person overseeing this transition, it is easy for details to fall through the cracks, leading to cracks in the actual building later on. By maintaining a clear line of sight across all these moving parts, the coordinator ensures that the temporary works serve their purpose without ever compromising the integrity of the final structure.