Scaffold types
Traditional Tube and Fittings
Before system scaffolds, there was tube and fittings – and for complex, awkward or one-off structures, there still is. Loose tubes, loose couplers and a competent scaffolder can fit a scaffold to any building ever built. That flexibility is the method’s whole argument.
The kit of parts
The basic components are tubes, couplers and boards. Tubes are usually aluminium or galvanised steel – aluminium lighter and more flexible, steel stiffer and more robust. Boards of seasoned timber, their ends protected by hoop irons or nail plates, provide the working surface; sole boards spread the load where the ground is soft or suspect.
Couplers are the fittings that hold it all together, and the three basic scaffold couplers are right angle couplers, putlog couplers and swivel couplers. Only right angle and swivel couplers may be used in a load-bearing connection; sleeve couplers join tubes end to end. Which coupler goes where is not a matter of preference – it’s what the structural design assumes.
Standards, ledgers, transoms
The vocabulary of tube and fittings is the vocabulary of all scaffolding: standards (the uprights, on base plates that spread the load), ledgers (the horizontals connecting them), transoms (across the ledgers at right angles), plus ledger braces and sway bracing to make the frame rigid. The lift height between ledgers is 2 m, with a base lift of up to 2.7 m.
Why choose it over a system scaffold
Proprietary system scaffolds are faster on regular elevations – that’s what they’re designed for. Tube and fittings wins wherever the building refuses to be regular: curved facades, stepped terraces, bridges, birdcages, temporary roofs, shoring and everything bespoke. Every connection is placed exactly where the structure needs it, which is precisely why the method demands more of the person placing it.
Caring for the kit
Tube-and-fitting stock is an asset that degrades in plain sight. Bent or split tubes, corroded threads, couplers with worn or seized bolts, and boards with broken hoop irons or deep splits all belong in the quarantine pile, not the wagon. A sensible yard routine – inspect on return, segregate the suspect, service the couplers – costs little and pays twice: the scaffold you erect behaves like the design assumed, and the kit itself stops walking off site, especially paired with the site security measures in our scaffold alarms guide. Damaged components doing load-bearing work is one of the recurring findings in the failures collected on our scaffold disaster videos page.
Where the method shows up across this site
Almost every structure described in these guides is, at heart, a tube-and-fitting configuration: the independent tied scaffold and putlog scaffold for facades, the birdcage for soffits, and towers where a single position needs reaching. Learn the grammar – standards, ledgers, transoms, the right coupler in the right place – and every specific scaffold type becomes a dialect of the same language.
Competence and cover
Tube-and-fitting scaffolding is the core of the CISRS training and card scheme covered in our regulations guide, and it’s the discipline insurers picture when they underwrite a scaffolding contractor. Keep cards current, work to recognised configurations or a bespoke design, and record every alteration – the paperwork trail is as much a part of the method as the couplers.
Tube and fittings FAQs
What are the three basic scaffold couplers?
Right angle couplers, putlog couplers and swivel couplers. Only right angle and swivel couplers may be used in load-bearing connections; sleeve couplers join tubes end to end.
Steel or aluminium scaffold tube – which is better?
Neither universally. Aluminium is lighter and more flexible, which suits handling and mobile structures; galvanised steel is stiffer and tougher, which suits heavily loaded and long-standing scaffolds. Many firms run both and choose per job – what matters is not mixing assumptions mid-design.
What is the standard lift height in scaffolding?
The lift height – the spacing between ledgers – is 2 m, although the base lift can be up to 2.7 m.
Is tube and fittings being replaced by system scaffold?
Displaced from regular facades, yes – system is faster there. Replaced, no. Bespoke geometry, heavy bespoke loads and everything non-standard still belongs to tube and fittings, which is why it remains the foundation of scaffolder training.
The traditional method, properly covered
Bespoke structures carry bespoke risks – make sure your liability cover understands tube and fittings work.