The prefabricated position of the bull leg column when lifting the bull leg column by the rotary method should be such that the
The foot of the column is close to the foundation. According to the textbook "building construction technology" on the column lifting method of rotary method and gliding method, and rotary method used to lift the cow leg column when the cow leg column prefabricated position should make the column foot close to the foundation. Gliding method of lifting the bullwheel column, the bullwheel column prefabricated position should make the lashing point near the foundation.