Unitip the rof surport bracket and the crane truss for demotishop cotumn in the light-steel workforms with protal frames the method of that desigh and calculation were intrduced in this paper.

According to the contrast of the three schemes, such as crane truss, welding I-shaped crane girder and welding box-section crane girder, the design scheme of box-section crane girder is adopted by con sidering with the economy and the safety.

Mechanical analysis and design of crane beam on rock wall for underground power house;

At present,the rigid-body limit equilibrium method adopted in the design of crane beam on rock wall can not reflect the actual mechanical behavior of crane.

The article introduces the excavation and demolition engineering of crane beam on rock wall in main engine hole of underground workshop during the project of Baise Hydropower Junction Station,for the reference of the similar projects.