... Column, H-Beam & C/Z-Purlinb. Material grade and performance of steelCarbon structural steel: Q235, Q345, etc. High-strength ... the followings:a. The function of the building.b. The drawings or the pictures c. Size for the building: Length, width, height. Doors and ... and disassemble for several times without damage.Widly used in construction site, office building,prefabricated house The project of ...