Tools, Equipment, and Materials Handling and Maintenance
What this domain covers
You must know the components of tube-and-coupler and frame scaffolds, how to handle them without damage or injury, and how to inspect, maintain and store them so they stay serviceable.
Core rules
- Tube: 48.3 mm outside diameter, 3.2 or 4.0 mm wall, in 2.4 m, 3.0 m and 6.0 m lengths. Reject bent, dented, split or heavily corroded tubes, and any tube with welded repairs.
- Couplers: right-angle (load-bearing, 90°), swivel (braces at any angle), putlog, sleeve/joiner. Tighten with a podger spanner, then verify with a torque wrench - commonly 40–65 N·m; confirm the figure in the specification.
- Bases: base plates on soleplates; adjustable base and U-head jacks extended only within the marked limit, never standing on blocks or oil drums.
- Boards: scaffold-grade timber, typically 50 mm thick and 225 or 250 mm wide, free of loose knots, splits and rot; steel planks with fully engaged hooks.
- Frames: frames, cross braces, guardrail frames, joint pins; castors locked before use.
Worked example
You torque-check a right-angle coupler holding a ledger. The wrench clicks at 50 N·m but the tube still slips under hand pressure. The likely fault is a worn coupler or an undersized, corroded tube - not under-tightening. Replace the coupler, check the tube, and do not "solve" it by over-tightening, which deforms the tube and strips the bolt.
Handling and maintenance
Hoist with rope and gin wheel or lift with two people; never throw or drop tubes from height. Clean threads, oil jacks, retract them for storage, cap tube ends, stack on dunnage and tag rejects.
Traps
Mixing parts from different systems, using ordinary timber instead of scaffold grade, and assuming galvanising means "no inspection needed".