US Patent 8991134 Reconfigured modular building unit and method

A modular building unit includes a top member, a bottom member, a plurality of wall members and at least one door member. The at least one door member and the wall members include a plurality of uniform-sized panel members. First attachment members are provided to reinforce openings in the unit. Second attachment members are provided on the uniform-sized panel members. The uniform-sized panel member are mounted in the openings and interconnected.