Scaffold Board Retaining Clamp
A board retaining coupler, often shortened to BRC, clamps a scaffold board down onto the tube below it so the board cannot lift or shift. It fixes to a transom or ledger with a single bolt, and a flat tab traps the board against the tube. On the top lift or any exposed scaffold, it is what stops a board being lifted by wind or walked out of place. Lengge makes them for 48.3 mm tube, made to BS1139 and EN74.
We hold board retaining couplers in bulk, galvanized or painted, and ship by the thousand, factory-direct for scaffold contractors, hire fleets and dealers worldwide.
| Item | Specification |
|---|---|
| Type | Board retaining coupler (BRC) |
| Function | Clamps a scaffold board to the tube to stop it lifting or shifting |
| Fixes to | Transom or ledger tube |
| Tube size | 48.3 mm (Ø48) |
| Bolt | Single T-bolt |
| Material | Pressed or forged steel |
| Standard | BS1139 / EN74 |
| Finish | Hot-dip galvanized or painted |
Tube size and finish can be set to your specification. Couplers are supplied loose in bulk for scaffold assembly.
A board retaining coupler clamps a scaffold board down to the tube below it so the board cannot lift or shift. It fixes to a transom or ledger with a single bolt, and a flat tab traps the board against the tube. It is used to secure boards that could otherwise be lifted by wind or moved by foot traffic. It is often shortened to BRC.
BRC is just the short name for a board retaining coupler, sometimes written board retaining clamp. Same fitting: a single-bolt coupler with a tab that holds a scaffold board down onto the tube. Suppliers and method statements often use the abbreviation.
Wherever a board could move or lift. The common cases are the top lift and any exposed or windy scaffold, where wind can get under a board and flip it, and end boards that overhang a transom, which can tip if someone steps on the overhang. Securing these boards with retaining couplers is standard safe practice.
It clamps onto Ø48 scaffold tube, the standard size, and suits standard scaffold boards. A single T-bolt closes it onto the transom, and the tab sits over the board. It is made to BS1139 and EN74, so it works with standard tube-and-coupler scaffolds.
No. It is a retaining fitting, not a load-bearing one. Its job is to stop a board moving or lifting, not to carry structural load, which is why it uses a single bolt and a light body. The load-bearing joints in the scaffold use double couplers instead.
We supply in bulk, galvanized or painted, and ship by the thousand. Stock moves quickly; large or custom orders we confirm at the time. Couplers pack dense into containers so freight per ton stays low, and we handle export packing, marking and documents for overseas projects.
A scaffold platform is only as safe as the boards on it. A board that lifts in the wind or slides under foot is a fall or a dropped-object risk, and the board retaining coupler, or BRC, is the simple fitting that holds it down. This page covers what a board retaining coupler does, when you need it, and how it differs from the load-bearing couplers in the scaffold.
A board retaining coupler clamps a scaffold board to the tube underneath it. The body fixes to a transom or ledger with a single bolt, and a flat tab reaches over the edge of the board, trapping it between the tab and the tube. Once it is on, the board cannot rise off the transom or slide along it. It is a small, light fitting that does one job: keep a board where it was laid.
Boards do not always need retaining, but in a few situations they do, and these are where the BRC earns its place:
Securing boards in these cases is standard safe practice, and many sites and method statements call for it directly.
It is worth being clear that a board retaining coupler is not a structural fitting. A double coupler joins two tubes at a right angle and carries the scaffold load; a board retaining coupler holds a board down and carries no structural load. That is why the BRC is a light, single-bolt fitting and the double coupler is a heavier, forged, load-rated one. They are bought together but do completely different jobs.
The board retaining coupler clamps onto 48.3 mm scaffold tube and suits standard scaffold boards. It is made to BS1139 and EN74, so it fits straight into standard tube-and-coupler scaffolds. Finish is hot-dip galvanized for outdoor and long-cycle work or painted for shorter use. Because these fittings sit out on the platform through all weather and get handled every time boards are moved, galvanizing is the practical choice to keep them from rusting and to keep the bolt turning.
Confirm the tube size against your scaffold and the finish against the site. Board retaining couplers are bought in bulk like the rest of the fittings, so check the supplier can hold volume and ship by the thousand without the price per piece rising on a large order. They are usually ordered alongside the other couplers as part of a full fittings package.
