When it comes to construction, much of the attention is focused on the permanent structure – the building, bridge, or infrastructure that will stand the test of time. But before the permanent works can be safely delivered, a carefully planned system of temporary works design is required. These are the essential supports, access systems, and stabilisation measures that allow contractors to carry out construction safely and efficiently.
Temporary works design is not always visible to clients, but it underpins the success of almost every project. Without it, projects would face risks of collapse, non-compliance, or costly delays. In this guide, we explain what temporary works design is, why it matters, and what contractors and clients need to know.
What Is Temporary Works Design?
Temporary works design covers the planning and engineering of structures that support construction until the permanent works are strong and stable enough to stand on their own. These could include:
- Scaffolding and formwork
- Falsework and propping systems
- Temporary bridges, platforms, or road diversions
- Shoring for excavations
- Hoardings and access routes
Unlike permanent structures, temporary works are dismantled after use. Yet their design requires the same rigour and technical expertise, because they must meet strict safety and performance standards during construction.
At Imperium Engineering, our team of structural engineers create temporary works solutions that are practical, compliant, and tailored to site conditions. This ensures contractors can deliver projects with confidence.
Why Is Temporary Works Design So Important?
1. Safety First
The primary purpose of temporary works is to maintain safety. Construction sites are inherently hazardous, and poorly designed temporary systems can result in collapse, injury, or even fatalities. A clear, certified design removes unnecessary risk.
2. Compliance with Standards
In the UK, temporary works are guided by strict codes, most notably BS 5975. Following the standard ensures designs are properly checked, authorised, and documented – all of which protect contractors from liability.
3. Cost and Efficiency
Well-designed temporary works save time and money. They minimise disruption on site, allow access to critical areas, and reduce the chance of remedial works. A poor design, by contrast, can cause delays, increased labour costs, or damage to permanent works.
Who Is Responsible for Temporary Works?
On most projects, a Temporary Works Coordinator (TWC) is appointed. Their role is to manage the process, ensure designs are in place, and check that installations follow the drawings. Supporting them may be a Temporary Works Supervisor (TWS), who oversees day-to-day activities on site.
The design itself must be prepared and signed off by a competent engineer. Contractors remain responsible for implementing the system, while clients and project managers must verify that adequate arrangements are in place.
Imperium Engineering works directly with contractors, architects, and developers to provide certified designs that integrate smoothly with the construction programme.
What Are the Main Types of Temporary Works?
Temporary works cover a broad range of site activities, but most fall into three categories:
1. Access and Support Systems
- Scaffolding, formwork, and falsework
- Provide access for workers and support for fresh concrete or heavy loads
2. Stability and Retention Measures
- Shoring, ground anchors, and retaining structures
- Maintain the stability of excavations, slopes, or partially completed structures
3. Site Logistics and Protection
- Ensure safe movement around site and protect works in progress
- Temporary bridges, haul roads, hoardings, or weather protection
Each system must be designed for its specific use, taking into account loadings, duration, weather, and interaction with permanent works.
The Role of British Standards in Temporary Works
The main reference in the UK is BS 5975:2019 – Code of practice for temporary works procedures and the permissible stress design of falsework. This sets out the management framework, checking categories, and responsibilities for TWCs and designers.
Other relevant standards may include:
- BS 8110 for structural use of concrete
- BS EN 12812 for falsework performance
- Construction (Design and Management) Regulations 2015 (CDM 2015)
Following these standards is not optional – it is a legal and contractual requirement.
What Happens if Temporary Works Are Neglected?
Unfortunately, history shows that temporary works failures can have severe consequences. From collapsed scaffolding to failed excavation support, these incidents often result in injury, legal action, and reputational damage.
By investing in professional temporary works design at the outset, contractors mitigate these risks. The cost of design is always far less than the cost of a failure.
Working with Imperium Engineering
Temporary works require a blend of technical knowledge, practical site awareness, and regulatory compliance. At Imperium Engineering, we:
- Provide certified designs tailored to your project’s needs
- Coordinate with contractors to integrate systems smoothly
- Ensure compliance with BS 5975 and related standards
- Offer rapid turnaround to keep projects on schedule
Our experience ranges from small-scale residential works to complex commercial projects. Whether you are planning an extension, a new build, or major infrastructure, our engineers deliver solutions that keep your site safe and efficient.
FAQs
What is temporary works design in simple terms?
It is the planning and engineering of temporary structures that support construction until the permanent works can stand safely on their own.
Who appoints a Temporary Works Supervisor (TWS)?
Typically, the main contractor appoints the TWS, while also assigning a Temporary Works Coordinator to oversee the process.
What are the three main types of temporary works?
Access/support systems (like scaffolding), stability measures (like shoring), and site logistics/protection (like temporary bridges or hoardings).
Is temporary works design a legal requirement?
Yes. Under UK regulations and standards like BS 5975 and CDM 2015, adequate design and management of temporary works is mandatory.
How do temporary works add value to a project?
They ensure safety, maintain compliance, reduce delays, and allow construction to proceed efficiently.
Final Thoughts
Temporary works design may not always be visible in the finished structure, but it is the foundation of safe, compliant, and cost-effective construction. From scaffolding to excavation support, these systems require the same expertise as any permanent work.
If you are planning a project and need expert advice on temporary works design, speak to the team at Imperium Engineering. We provide tailored solutions that keep your site moving safely and efficiently.
📞 Contact us today to arrange a consultation and ensure your property obligations are managed the right way.
