Patent ID: 7797897

Claim:
A building construction system, comprising: a group of modules, which are interconnectable to create a shell of an edifice, each module in the group comprising a pair of parallel lateral longitudinal panels having opposite ends, each lateral panel terminates at either of the opposite ends thereof with a flexible catch region comprising a long portion and a short, bent-in portion, and at least one transversal web, wherein said lateral panels are bridged by the at least one transversal web extending between the panels, and a joiner for interconnecting modules in the group, the joiner having at least two faces detachably connectable to the opposite ends of the module, and a face of the joiner comprises a pair of teeth wherein each tooth in the pairs of teeth has a cross section having a first side and a second side, the first and the second sides being perpendicular to each other and having a third side in a slanting relationship to both the first side and to the second side such that, when the face of the joiner is pressed against the catch region of the module, the long portion flexes and the bent-in portion snaps into and behind the teeth to connect an opposite end of the module to the joiner.