That work around works well to offset the brace if the start and end points are in the same plane (i.e.: column and beam). But in this instance where the beam is offset from the column, it seems like either your start point or your end point will have nothing to snap to. For example, if you start at the column end, then there will be nothing to snap to when you extend it to the offset beam. Or, if you start at the offset beam, you will have nothing to snap to when you are extending to the column.