platform racing : 1.CE,ISO9001:2008; 2. ... , fastenerStandard, LedgerStandard, Leger, DiagonalForce styleFriction, ShearAxial loadReliabilityFree frame node, diversity, low reliabilityFixed size component, steady structure, ... 7T2.5T2.8TErection efficiency134Wastage rate10%5%2% ConclusionFlexible frame, low reliability, excessive material, huge wastage more ... low wastage, high efficiency platform racing