I put up a 60X100X18 with a 40' bifold from Norquay Co-op very good people they did the whole shed in 2 1/2 days they were amazing very happy with them. Also have a 48X120X16 built by MacDarmit out of Winnipeg but the Norquay coop was nicer to deal with. Both buildings are wood post. Norquay has there own crew that comes with all there own equipment to drill holes lift rafters zoom booms and lifts.