Damaged Column 6

[BPres]

We have a large assembly building. At one end we have a 10 ton bridge crane followed in series by several 5 ton bridge cranes. All have a lift height of 21 feet.

One of the columns between the 10 ton and the 5 ton next to it was damaged by a fork truck. About 6 inches off the floor. The column is a W10x77. One flange was dented in approximately 1-1/2" on one side of the web. On the other side of the web the flange bowed out approximately 1".

Aside from AISC Manual of Steel Construction Allowable Stress Design (page I-149, Permissible variations in cross section), are there any thumb rules or codes dealing with damaged columns?

 

[pba]

jen4950,

OK - Here is some more detail.

The column was located in an old train shed near to a dock. The building had been coverted into small work shops at some previous date.

The company I worked for was the consulting engineer. We had been down to site to view the building. The column in question was one of several in a row, supporting the roof over. We couldn't get access to see the columns as the partitioning was in the way. We only wanted to know what the column detail was at floor level. I'd been told that this was important but can't remember why!

I asked the contractor the remove the casing to one column, assuming timber studs but turned up on site the next day to see a hole in the column bigger than my fist and clear surface damage elsewhere.

I phoned the office and explained what had happened and the boss spoke to the contractor and had him prop the roof.

The design progressed on the basis that we would replace a damaged column but we didn't let on how it had been damaged!

In the end the client changed his mind regarding the building and it was knocked down so the column was never replaced.

 

[BPres]

Sorry for the delay UcfSE. No, the work has not yet been done. I plan on welding 1" thick plates on both sides of the web out at the outside edges of the flanges. The plates will extend about 6" above and below the actual point of bend. This will turn the column from an I beam to a box at the damaged area.