Not good http://www.nydailynews.com/new-york/crane-collapse-manhattan-article-1.1194790 Amazing what the wind did to that boom
This is sad, but they’ll come up with a good plan to get it repaired and working again. A chopper is too risky at that height and in this wind, and erecting another crane at a 60th floor level is impractical. I would hire an expert rigger and have him determine the location of the strongest and most strategically placed snatch blocks, to utilize the crane’s own load line to lower each chunk of scrap down after they cut it at a size and weight that can be controlled and lowered safely down along the side of the tower. They could also use tuggers at the ground level to keep the pieces from swinging back into the tower or the sides of the building.
There have been a couple that collapsed in the Seattle area a few years ago. Not good. Sent from my iPhone
thats going to be a job to repair. video. http://www.liveleak.com/view?i=ce7_1351546353
Actually just one http://seattletimes.com/html/localnews/2003434979_crane17m.html And in 1989 a tower crane collapsed in San Francisco killing the Seattle area operator and several Ironworkers. The crucified the late operator, although his personal issues were later cleared as a contributing factor. http://www.chron.com/CDA/archives/a...n-crane-accident-reportedly-attempted-su.html
There's no way the FAA would allow a helicopter. My bet is a really big hydraulic crane with a really big luffing jib, or even two rigs. Get guys on the steel, rig the iron and cut it loose. But do a lot of thinking first
Could have sworn there was another one a couple months after that one. Oh well. Sent from my iPad
The moment is happened http://www.liveleak.com/view?i=36a_1351572925
Do you crane guys t think that this crane was working at the time or parked for the storm. Looks to me they could lowered it to prevent the screw up.
Video of actual collapse. http://www.youtube.com/watch?v=84HOXzflMd4 WARNING: strong language at the end of the video.
I'm no expert on luffing towers in any shape or form (crawlers for me), as it would seem this was caused by the wind (perhaps also some contributing factors),could they not have climbed the crane down,or if there is a facility to put the crane in "free swing" ? we used to do this with our big crawlers in Hong Kong if there was strong pre-typhoon winds.
With that crane facing the oncoming storm and the boom being in such an upright position someone was not thinking of the impending circumstance coming there way. If they would have lowered the boom another 10-20 degrees this may not have happened.
Wow
Here is some more info. http://enr.construction.com/product...ng-Crane-Was-WeatherVaned-Contractor-Says.asp
Heard on the news last night that they will need to erect another crane to remove the damaged crane. It also stated that it had been set to windmill, also had been in several other storms since it had been erected. An engineer also stated that the wind around the top of the building may have been stronger.
Strong wind does some interesting things when it hits tall buildings. A stand alone high rise will get some odd wind at the corners where it tries to get around the big structure, but if there’s more tall buildings near by it can have a nozzle effect, and can increase in velocity, as it is forced to go between them. If there’s a very tight cluster of big buildings the air can also be pushed up and over the top too, which would lift a boom, if it was at more than an optimal angle. The lowest angle that he could have set it [with out hitting the roof, plus about 5’ for a fudge factor] before weathervaning would have helped it rotate, and oriented the boom down wind, not up wind.
http://www.nydailynews.com/new-york...cured-6-days-snapping-sandy-article-1.1196876
I wonder if they will just cut the boom into smaller pieces and lower it down.
last i heard they were going to have to erect the same model tower on site and use that to take the other one down. Then after it can be used to finish the original scope of project.
Digging up an oldie here, some photos from the top. http://ny.curbed.com/archives/2012/11/14/vertigoinducing_photos_of_the_collapsed_one57_crane.php Alex.