While the existing models based on concept lattice aim at the static database and the attribute value is just from the single level, lacking of the transformation of granularity.

In order to investigate the mechanical performance of lattice girders, a series of small scale static load tests are carried out and the loading properties and failure behaviour are analysed.

Introduction is made to the lattice apron regarding hot setting, melt cutting, way of anti-static and ultrasonic cleaning.