How many types of insulated commercial doors are available from Steel-Craft?

I want to purchase a commercial door for my shop. What's the standard size for a commercial door?

What about metric sizes or other special sizes?

My opening is wider than your maximum size door, what can I do?

How does a sliding centre mullion work?

How much space is required above the door height to install a standard commercial Steel-Craft door?

If I install a commercial door operator, will I need more space than that listed above?

Is there special hardware available that will reduce the amount of room I need above the door opening?

How much room do I need on each side of the opening to install a Steel-Craft door?

Are there other types of hardware available that will allow my door to travel straight upwards, or maybe upwards for a few feet and then travel overhead? What about upwards for a few feet then overhead at a 5:12 or 6:12 slope?

I'm a contractor and presently building a large facility for a client and I need to know how to frame the opening for one of your large commercial doors. How can I get this information?