line chart formatting problem

Hello all,

For work I am creating a bar graph with four sets of data (i.e.---four bars for each discrete x-axis value). These four sets of data are all supposed to conform to the same max limit. I'd like to graph this limit as a line and not a set of columns or bars. I need the limit to be a line with a positive slope before it goes constant for a bit and then jumps to a higher constant for the remainder of my relevant x values.

Doing this as a line chart can't give me the jump discontinuity that I'm looking for. Doing it as a scatter plot doesn't seem to work with my discrete, logarithmic x-axis. I can't really just draw the lines on either as I have to define the numerical limit very accurately. Could I maybe do it point by point graphing the individual points as horizontal bars? I am currently searching for a way to do that. Any help would be much appreciated.

Thanks in advance,
Noah

I am unable to post the workbook or an attachment because of the NDA's I've signed (sorry). Anyways I came up with a basic, temporarily acceptable fix where I still use a line chart but hide the line and use the markers to show the limit. It doesn't give me the line I want but the limit is clearly defined and visible which is most important to me.

Thanks,
Noah