The structure adopts steel structure industrial building

At present, most of the industrial hoist gantry crane structure adopts steel structure, all kinds of span, the cross section of the steel crane beam needs more and more. Compared with more than 10 years ago, when the steel crane beam in the design of product quality requirements, especially further strict to the requirement of welding quality; And, because the owners of construction period limit makes the steel crane beam production cycle have to further compression; Second, due to the increasingly fierce competition in steel structure manufacturing, make the bid have been almost zero profit in the competition, all contractors have to excavate the potential to reduce the steel crane cost from various channels. Steel crane beam is one of my company's main steel structure products, accounting for about 50% of the annual steel structure manufacturing tasks. My company to undertake the EGang cold rolled sheet plant engineering main factory main rolling across different and finished 1/3 blocks of steel crane beam installation tasks, a total of 64, including 15 m across 56 root, 9 m across 4, 2.2 welding position: CO gas shielded welding using short 2 road transition welding, suitable for flat, vertical, horizontal, and all position welding. 2.3 current density, current density is high, the molten drops high fusion rate and is suitable for the welding process of single-sided double-sided forming. 2.4 welding deformation, heat concentration, heat affected zone 21 m across four root; Material Q235 - C 32, small wood, after welding deformation is small.