Just curious... I'm not in construction and always wondered...
2007-06-18 04:03:57 · 2 answers · asked by garyforlenza 1 in Science & Mathematics ➔ Engineering
The top sections of the mast beneath the crane are removed one at a time and lowered to the ground. The top section of the crane has hydraulic rams that lower it down one mast section at a time. It is hard to describe without a diagram or photos.
See photos at attached link.
In some design, the jacking portion is at ground level. The crane jacks itself up so a 20' section of the mast can be unbolted and slide out. Then the jack is lowered so the process can be repeated. See second link for photos and a more detailed explanation.
2007-06-18 04:47:39 · answer #1 · answered by Thomas C 6 · 0⤊ 0⤋
little pieces by welly chopper
2007-06-18 11:06:31 · answer #2 · answered by violatordepeche 3 · 0⤊ 0⤋