re: Jointer height

When planing smaller stock, having it a little higher is not a big deal but for long and heavy pieces, you typically want it a little lower to make it easier to manage and control as you slide it -- you want to be able to comfortably hold stock down on the table.  I think that you would want the bed to be at about the same height that you find is comfortable working at a workbench with hand planes.  You would typically bend over a little so that you can use your upper body to hold stock down but not so low that your back would start to hurt if you were doing it for a while. I think that on most full sized jointers the bed would probably be about  31-34" above the ground, which  my workbench happens to fall.  I don't have a full sized jointer to measure but that is about what I remember.