Why did the channel steel start from the 4 floor?
Through the comparison of economy and technology, a reasonable starting position is obtained.The bottom construction, not early pick, and pick too late, the following shelf is relatively high, uneconomical. Compare the two.In other ways, you can tell that the four floor is better. It's settled.
Note: all cantilever channel wall must be done when the box, to prevent future channel can not be removed. There are cantilevered outer shelf, buried channel layer, for the cantilever channel construction, all the balcony on the side of the reserved steel bar, the latter two times pouring concrete. The other floors, outdoor lifts, discharging platforms and tower crane delivery platforms meet the same way on the top side of the balcony.
Bottom construction, not early and pick. There are other aspects, you can see that the four layer began to be better, and pick too late, the following shelf is relatively high, uneconomical. Compare the two. It is decided, through the economic and technical comparison of a more reasonable starting position.
