Re: roof columns basesFrom: BABRTs 973 
Date: Tuesday, April 05, 2011
Time: 11:07:13 PM
Remote Name: 220.127.116.11
CommentsTankies have a tool called a hair pin. It is two pieces of I beam with a pin at one end to join the two pieces. The pin needs to be heavy enough to carry the load you are going to put on the I beams.
Two ears are welded on the column with 1/2 inch or thicker depending on how much weight will be lifted. The I beams rest on the bottom of the ears. The pinned end is supported with heavy skids and the open end has a piece of I beam placed under the pinned I beams. A 20 ton hydraulic jack is placed under the I beam and this jacks the column.
You have to be careful on T columns as you can bend them really easily.
Jacking a floating roof is another thing as you have to be careful on where the jack is places so as not to bust welds on the floating roof.