... stage set up by our Ring lock system scaffolding for a performance in EXPO 2010 ... tube scaffoldCup lock scaffoldRing lock system scaffoldComponentTube, fastenerStandard, LedgerStandard, Leger, DiagonalForce styleFriction, ShearAxial loadReliabilityFree frame node, diversity ... .5T2.8TErection efficiency134Wastage rate10%5%2% ConclusionFlexible frame, low reliability, excessive material, huge wastage ...