China Scaffolding Test Standard：GB 15831-2006

Steel tube scaffold couplers

Test item：
Right angle couplers
1 Slipping force

2 Torsional rigidity 

3 Failure force

4 Appearance
Swivel couplers
1 Slipping force

2 Failure force

3 Appearance
Sleeve couplers
1 Pull force

2 Appearance
Base-plate
1 Press force

2 Appearance