Jacks, Planks & Systems
Cuplock System is a modular tube-and-cup vertical scaffold framework with ledgers and transoms that lock into cups welded at 0.5 m intervals on the verticals. It is the standard framework for facade scaffolding, towers, birdcages and stairs in the UK, Ireland and internationally, often specified against BS EN 12810. Specify the vertical height, bay configuration, finish and the quantity you need.
At a glance
Verticals arrive with welded cups top and bottom at 0.5 m spacing. Each ledger or transom blade end slides into the top cup at your chosen height and locks firm — the cup lip grips it so it cannot slip under load. That means you set bay height freely within the cup grid, and the connection stays locked without bolts or pins.
The 150 mm spigot joint accepts ledgers and transoms at any cup height, so you choose whether a bay spans 0.6 m or stretches to 3.0 m wide. That flexibility lets you fit the scaffold framework to any building facade or structural edge without custom-length horizontals.
Verticals 1–4 m in 0.5 m steps, 48.3 mm O.D., 3.2 or 4.0 mm wall; top and bottom cups every 0.5 m; 150 mm spigot joints for 0.6–3.0 m bays. Plain, zinc plated or hot dip galvanized.
Also known as
Cuplock System is sold as cuplock scaffolding across the US, the UK, Australia and New Zealand; in other languages it is échafaudage cuplock (French) and Cuplock Gerüst (German).
Position a vertical. Set a ledger or transom at the height where the next cup sits, and push its blade end into the cup opening. The cup lip surrounds and grips the blade, so the horizontal cannot rise, fall or twist — it stays locked at that height even as the platform loads up and workers move across it. Move to the next cup for the next horizontal.
Common applications
The cuplock framework wraps the building face floor by floor. Cup intervals match typical storey heights so stages land level, and the flexible bay width fits window or panel patterns as the scaffold travels around corners and edges.
Birdcages for plant, hoists or service shafts rise inside buildings with cuplock's rigid cup-locked connections. The framework stands square and plumb under its own weight and operating loads because every horizontal locks into its cup the moment it is seated.
Cuplock bays compress to 0.6 m wide, so you can build staircases and narrow scaffolding through confined plant rooms, around existing beams, and in dense site layouts. The small bay range makes it possible to tie the scaffold directly to existing structural edges.
Questions answered
Cuplock System supplies the verticals, cups, ledgers and transoms that lock together to form the scaffold framework. Planks create the working platforms, and Screw Jacks with Base Plates foot the base. See how cuplock assembles with other components.
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