Prefabricated building structure

Claim 1

A prefabricated building structure of the type comprising horizontal tongue-and-groove planks of a sufficient thickness for assembly into an insulated building in a confined space and which building structure comprises: a pluraltiy of tongue-and-groove wooden planks having generally planar, generally mutually parallel and longitudinally extending inner and outer surfaces, each such plank being of a predetermined height and thickness, such planks being disposed in mutual tongue-and-groove edgewise horizontal mating engagement with each other to form the walls of said building structure and some of said planks having butt ends at one end thereof for defining a door opening; a tenon defined by longitudinally extending faces and projecting longitudinally from a respective end of each said plank at each said corner of said structure and defined by upper and lower rectangularly cut away portions of said plank thereby locating the tenon intermediate the upper and lower edges of the plank each said tenon having a width essentially equal to the thickness of each said plank, a height equal to about one half the height of the plank such that the tenon interfits snugly with the tenons of adjacent said planks, and a longitudinal length which is less than said plank thickness whereby when a said plank is assembled at a corner with other planks the lower cut away portion thereof receives part of the tenon of the subjacent plank, and the upper cut away portion receives part of the tenon of the super-adjacent plank; vertically extending grooves formed in outer surfaces of said planks for alignment of such grooves with each other when said planks are disposed in mating engagement as aforesaid thereby to form continuous vertical grooves in both walls adjacent each said corner of said building structure; vertically extending holding members having generally L-shaped horizontal sectional configurations, each including two mutually perpendicular legs and adapted to fit snugly around a respective corner of said building structure; flanges on said legs of each said holding member to fit within respective ones of said continuous vertical grooves and to interlock said planks in their assembled disposition; sealing members on said legs of said holding members outwardly of said flanges for sealing engagement with said outer surfaces of respective ones of said walls; a roof assembly mounted on said walls to enclose the upper part of said building structure; door frame members adapted to be attached to said butt ends of said planks within said door opening; and floor means within said building structure.