How to speed up the construction speed of steel support in the excavation area
Axial force: in architecture, the internal force which coincides with the axis of the rod is called axial force, which is represented by the symbol FN.
The axial force of the diagonal brace is 1/sin times of the same span. The angle between the axis and the axis of the crown beam
The design of pre axial force (force along the direction of the line per meter of straight brace under the effect of the length of the steel support) multiplied by the
