Overhead Crane Columns
Overhead Crane Columns
(OP)
Wondering if there is any publicaitons or data on when to use seperate crane columns vs attaching crane runway beams to the main building frame columns. I have a 40' tall building with (2) 30 ton cranes with possible expansion. I would gladly do prelim. engineering work on this, however this isn't in our budget and would stray from preliminary plans that were presented.






RE: Overhead Crane Columns
http://www.eng-tips.com/viewthread.cfm?qid=340535
Now, you don't say whether or not you plan to attach to the existing columns using brackets, or if your are trying to fabricate a stepped column or if you are trying tor frame the system completely independent from the structure. I have never done a crane that large, I would definitely not use brackets, I would probably use a separate crane column.
Some good information can be found in AISC DG 7.
Hope this helps.
RE: Overhead Crane Columns
DaveAtkins
RE: Overhead Crane Columns
RE: Overhead Crane Columns
http://www.cisc-icca.ca/files/publications/techpub...
RE: Overhead Crane Columns
RE: Overhead Crane Columns
3. Brackets should not be used to support crane beams with unfactored reaction greater than about 250kN.
Has anyone else seen this stated elsewhere. I would like to see it in a more specific tone.
RE: Overhead Crane Columns
After the design of my last facility (a 15-ton crane with a 58 foot bridge), I would place my rule of thumb for bracketed crane columns at around 15-tons. Anything over 15-tons I would use a separate column system. This seems to fall in line with DaveAtkins. I have talked to others in the metal building industry and I have been told that they will frequently use stepped columns for large cranes. I have also visited a few fabricators, one of note had 2 5-ton cranes on the same line located on a separate column system braced back to the main building columns.