All, thanks for all the replies, sorry buy I just saw them today. Didn't get any email notifications any replied.

John Jay, yes that is how I have been measuring.

Indirtwtrust, we had a discussion on site about this, we had three mechanics and an inspector (multiple mods going on at once) , between our four gauges we had 4 different readings. Thanks for being willing to look up the door info. They are 48" two speed side slide with a 84" clear height with a stainless finish. If I remove them and weigh them, do I use the total weight or just one?

TC7, that's a good call, didn't think abut flipping it. I am using the small groove.

ridevertical, thanks for that clarification as well. I couldn't find the calculation in the book. Not in 2.13.4.2 or any of the appendix.