[rwhite692]

Unless you really have your heart set on doing those three small doors for aesthetic reasons or something....My advice is, don't do it.

Go with a single 16' wide door, preferably with a 9 foot clearance.

Those small doors are going to greatly limit what you will be able to get into/out of the shop. Who knows what the future may bring.

Also you lose that whole available wall, to doors.

Have you considered building with Scissor trusses, so that you can achieve a high (vaulted) ceiling at the center (so that you can accommodate a lift)?