These are steel garages and buildings manufactured by Versatube. 

Easy to install.  Made to last.  Garages and buildings are Versatube's most popular products - and for good reason.   Pre-engineered for easy installation - most of the work has been done for you.  They have a patented swagging process produces unique "Slip-Fit" connections that speed up frame assembly.  Apply the painted steel roofing, siding and trim and your project is complete. 

VersaTube Garage & Building Highlights

• All-steel framing system uses primarily 2" x 3" heavy gauge triple layer galvanized steel tubing that is resistant to rust, fire, termites and rot.
• Patented "Slip-Fit" connections contribute to the ease and speed of assembly.
• With 67% of all steel recyclable, VersaTube is an environmentally-sound building system for the DIY consumer.
• Features a 3:12 roof pitch and engineered to address local Ground Snow & Wind Load conditions.  Contact us for an Engineering Package Order Form for ordering engineering calculations and/or stamped drawings if required for permitting.
• Compact packaging makes for more cost-effective delivery and storage.
• Available in either Frame-Only or Complete Package kits.  Complete kits include all framing and hardware, plus painted steel roofing, sidewall and trim, as well as an installation video and written instructions to complete the structure.  Concrete or foundation work, garage and side entry doors, windows or installation are not included.