The Revolution in Portable Support: How Bi-stable Reeled Composite Technology Is Transforming Mast Systems

Portable mast systems have been built in broadly the same way for decades. Telescopic tubes, sectional poles and pneumatic systems all do the job, but each carries its own weight, complexity and maintenance burden. A different approach to composite design has changed what a portable mast can be, and it sits at the heart of every system Rolatube makes.

This guide looks at Bi-stable Reeled Composite (BRC) technology: what it is, how it works, what sets it apart from other rollable composites, and why it is opening up new possibilities for portable support in the field.

What Is Bi-stable Reeled Composite Technology?

A Bi-stable Reeled Composite, or BRC, is a unique and counter-intuitive approach to composite design. Most modern composites are designed and manufactured to remain stable in the shape they are produced in. BRC is deliberately designed to do the opposite. The material transforms between two stable formats on demand: a compact, rolled format for transport and storage, and a rigid, structural tube when deployed.

That word stable matters. The BRC is completely stable in both its rolled and deployed states, which means it can be transported, stored, deployed, recovered and redeployed thousands of times without losing its structural behaviour.

BRC is built from multiple layers of reinforced composite materials, most often glass-reinforced polypropylene. The angles of the reinforcement in those layers can be tuned to create the bi-stability characteristics for a given application, balancing size, weight, strength, rolling behaviour and cycle life.

How BRC Differs from Other Rollable Composites

Technically, BRC belongs to a wider family of composites known as Slit Tube Engineered Members, or STEMs. Composite and metal STEMs have existed for a long time. The difference is that conventional STEMs are not stable when they are rolled. They behave like a wound-up spring, physically restrained in the rolled format and driven to explosively deploy into a tube. That high-energy rolled state is dangerous to handle and has historically limited where STEM technology can be used.

BRC solves that. It is completely stable in the rolled format, completely stable in the deployed format, and the transition between the two happens in a calm, controlled manner. That single change unlocks the latent potential of STEM technology as a serious engineering solution, and is the basis of every BRC product Rolatube makes.

It is also worth being clear about what BRC is not. It is not a generic rollable composite or an industry-standard material. Rolatube invented the concept and holds the patents on both the technology and the products that incorporate it, which means BRC products are unique to Rolatube.

Why It Matters for Portable Mast Systems

Traditional portable masts solve the problem of getting equipment up in the air in one of three ways. Telescopic systems nest tubes inside each other and lock them at height. Sectional systems are built up from individual poles or lattice sections. Pneumatic systems use air pressure to extend telescopic stages. Each approach works, but each adds weight, mechanical components or external services.

BRC takes a different route. The same composite that rolls into a compact package forms the rigid, structural tube of the deployed mast. There are no telescoping sections, no locking collars, no air sources and no moving parts to wear or fail. For users in the field, that translates to a system that is significantly lighter and more compact than a telescopic equivalent, typically deploys in under five minutes by hand (often by one operator), and rolls up cleanly for transport with no tools required.

That combination has made BRC masts the system of choice for organisations that have to carry their kit into hard-to-reach locations, deploy quickly under pressure, and rely on it working first time after long periods in storage.

Integrated Functionality: A Capability Unique to BRC

There is one more property of BRC that other rollable composites cannot match. The low-energy rolled format is not a wound spring, which means components can be integrated directly into the composite layers without being destroyed in deployment. With a conventional STEM, the deployment energy would tear those components apart.

Rolatube has used this property to develop BRCs that incorporate rollable RF antennas, electrical conductors and lighting arrays within the composite material itself. The Integrated Antenna Mast (IAM) range is one example: the antenna is part of the mast, not a separate component mounted on top, which removes the cabling and connector points that often cause field failures. The same approach extends to integrated lighting and integrated electrical run-outs in other product lines.

For end users, the practical effect is fewer separate parts to manage, lower weight, faster setup and a more reliable system overall.

Where BRC Technology Is Used

The combination of compact storage, light weight, fast deployment and reliable performance suits BRC to a wide range of sectors. Defence and military teams use BRC masts for tactical communications, surveillance and target acquisition in environments where conventional kit is too bulky or too slow to deploy. Emergency services rely on BRC for rapid-deployment command and communications when fixed infrastructure is unavailable. Broadcast and media crews use it for outside-broadcast antennas, microwave links and camera support at events and breaking-news sites. Industrial users deploy it for construction-site lighting, security and communications. Surveyors and inspection teams use BRC tripods to mount instruments and cameras in remote locations.

The technology also reaches well beyond the ground. In the marine sector, BRC supports coastal search-and-rescue operations and shipborne communications. In space, Rolatube’s BRC booms are now in orbit on CubeSat missions, deploying instrumentation and inspection cameras. The shared thread across all of these sectors is the value of getting structure into place quickly, in a small package, and trusting it to perform.

Why Rolatube

Rolatube is the only manufacturer of Bi-stable Reeled Composites in the world. The concept was invented in 1997, and the company was founded specifically to commercialise it. Rolatube holds patents on the technology, the manufacturing processes and the products that incorporate BRC. All design, R&D and manufacturing happens at the Lymington facility in the UK, with around 95% of production going to export markets.

For organisations looking at how BRC could solve a portable structural problem, Rolatube remains the only source for both the material and the engineering expertise behind it. Get in touch to discuss an application, or explore the wider BRC technology.

FAQs

What does Bi-stable Reeled Composite mean?

Bi-stable describes a material that is mechanically stable in two distinct configurations. In BRC, those are a compact rolled format and a deployed tube format. Reeled refers to how the material is stored and deployed, and composite describes the layered, reinforced material it is built from.

How is BRC different from other rollable composites?

BRC is the only composite of its kind that is completely stable in both rolled and deployed states. Conventional Slit Tube Engineered Members are not stable when rolled, which means they behave like a wound spring and have to be physically restrained. BRC removes that limitation, which makes a much wider set of applications possible.

What is BRC made from?

Most Rolatube BRC products are built from multiple layers of glass-reinforced polypropylene, with the angles of the reinforcement tuned to give the right balance of size, weight, strength, rolling behaviour and cycle life for the application. Other materials, including carbon-fibre composites, are used for specific applications such as space deployables.

How many times can a BRC mast be deployed?

A BRC is designed to be deployed thousands of times without losing its structural behaviour. The exact cycle life depends on the specific design, but BRC products in active service have been deployed and recovered repeatedly over years of field use.

Can a BRC mast carry the same load as a telescopic mast?

Load capacity depends on the system and the height it is deployed at. Rolatube BRC masts cover a range of load ratings from compact single-tube systems to larger double-tube configurations supporting heavier equipment. As a general principle, BRC delivers the strength field teams need at a fraction of the weight and packed size of a comparable telescopic system.

Can other components be built into a BRC?

Yes. The low-energy rolled format allows components to be integrated directly into the composite layers, which is not possible with conventional rollable composites. Rolatube uses this capability to embed RF antennas, electrical conductors and lighting arrays into specific product lines.

Where can BRC technology be used?

BRC is in use across defence, emergency services, broadcast and media, telecoms, construction, surveying, inspection, marine search-and-rescue and space applications. The common factor is the value of getting structure into place quickly and reliably from a compact, lightweight package.

Is BRC available from anyone other than Rolatube?

No. Rolatube invented the technology and is the world’s only manufacturer of BRC. The patents cover both the material and the products that incorporate it.