→Used in steel tube with diameter 48.3mm/51.0mm scaffolding coupler property test, including right angle coupler, swivel coupler, parallel coupler, sleeve coupler and base plate.
→ Tests of right angle coupler (RA): slipping force, failure force, rotation moment and stiffness, pull arpart force, cruciform bending stiffness and bending moment, indentation.
→Tests of swivel couplers(SW): slipping froce, failure force, indentation.
→Tests of parallel coupler (PA): slipping force, failure force, indentation.
→Tests of sleeve coupler (SF): slipping force, bending moment.