北京兰华大厦为劲性混凝土结构，采用劲性混凝土柱作为结构主要受力构件，尤其斜向劲性柱，其体量及施工难度大。
Beijing Lanhua Mansion is of stiffened concrete structure , in which stiffened concrete columns are adopted as main load bearing structure . In particular , the construction of tilted stiffened column of big volume is a hard task .
兰劲