When you are running an operation with lots of racking, it isn’t uncommon to have to replace an occasional upright or beam, or to add new bays onto an existing row. Sometimes you cannot avoid it, as the rack was purchased years ago, by someone else, or from a source you can’t even locate. It might be that you bought used rack and need to fill some gaps in, or it may be perfectly good, 10-year old rack that just needs some damaged components replaced.
This is done all the time, and although it isn’t an optimum situation for rack stability and safety, you can minimize the issues by following the following guidelines: