Patent ID: 6845871

Claim:
A system for modular construction comprising: (A) a plurality of structural members, each of said plurality of structural members comprising: (1) a first lengthwise side and a second lengthwise side opposite said first lengthwise side, each of said lengthwise sides being generally parallel to each other; (2) a first widthwise side and a second widthwise side opposite said first widthwise side, each of said widthwise sides being generally parallel to each other; (3) at least two slots along one of said lengthwise sides, each of said slots comprising: (a) a pair of generally parallel slot sides; (b) an open end along one of said lengthwise sides; (c) a slot axis parallel to and disposed equally between said slot sides; wherein a first one of said at least two slots defines a first outside slot which is located nearest to the first widthwise side and a second one of said at least two slots defines a second outside slot which is located nearest to the second widthwise side; and wherein the distance between the slot axis of the first outside slot and the first widthwise side is a predetermined slot-to-side distance and the distance between the slot axis of the second outside slot and the second widthwise side is a whole-number multiple of the predetermined slot-to-side distance; and wherein the distance between each of the slot axes of the at least two slots along one of said lengthwise sides is a whole-number multiple of the predetermined slot-to-side distance; and wherein each of said at least two slots alone one of said lengthwise sides of one of said plurality of structural members is detachably and selectively connected slot-to-slot to each and every one of all of said at least two slots along one of said lengthwise sides of each of the other of said plurality of structural members.