Modular construction system

1. A system for modular assembly, said system 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 side;

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 along one of said lengthwise sides of said plurality of structural members is adapted to be detachably and selectively connected slot-to-slot to 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; and

wherein said plurality of structural members comprises a first vertical structural member, a second vertical structural member, a first horizontal structural member and a second horizontal structural member; and

wherein the first outside slot of the first vertical structural member is detachably connected slot-to-slot to the first outside slot of the first horizontal structural member, the second outside slot of the first vertical structural member is detachably connected slot-to-slot to the first outside slot of the second horizontal structural member, the first outside slot of the second vertical structural member is detachably connected slot-to-slot to the second outside slot of the first horizontal structural member, and the second outside slot of the second vertical structural member is detachably connected slot-to-slot to the second outside slot of the second horizontal structural member such that the first vertical structural member is substantially parallel to the second vertical structural member and substantially perpendicular to the first horizontal structural member and the second horizontal structural member.

2. The system for modular assembly of claim 1 wherein the distance between the slot axis of the second outside slot and the second widthwise side of each of the plurality of structural members is equal to the predetermined slot-to-side distance.

3. The system for modular assembly of claim 1 wherein each of the at least two slots along one of said lengthwise sides of each of the plurality of structural members has a substantially equal slot depth.

4. The system for modular assembly of claim 1 wherein said at least two slots along one of said lengthwise sides of each of said plurality of structural members includes at least one slot which is located between the first outside slot and the second outside slot of each of the plurality of structural members.

5. The system for modular assembly of claim 4 wherein the plurality of structural members includes a third vertical structural member; and wherein the first outside slot of the third vertical structural member is detachably connected slot-to-slot to one of said at least one slot which is located between the first outside slot and the second outside slot along one of said lengthwise sides of the first horizontal structural member and the second outside slot of the third vertical structural member is detachably connected slot-to-slot to one of said at least one slot which is located between the first outside slot and the second outside slot along one of said lengthwise sides in the second horizontal structural member such that the third vertical structural member is substantially parallel to the first vertical structural member and the second vertical structural member and substantially perpendicular to the first horizontal structural member and the second horizontal structural member.

6. The system for modular assembly of claim 4 wherein the plurality of structural members includes a third horizontal structural member; and wherein the first outside slot of the third horizontal structural member is detachably connected slot-to-slot to one of said at least one slot which is located between the first outside slot and the second outside slot along one of said lengthwise sides of the first vertical structural member and the second outside slot of the third horizontal structural member is detachably connected slot-to-slot to one of said at least one slot which is located between the first outside slot and the second outside slot along one of said lengthwise sides in the second vertical structural member such that the third horizontal structural member is substantially parallel to the first horizontal structural member and the second horizontal structural member and substantially perpendicular to the first vertical structural member and the second vertical structural member.

7. The system for modular assembly of claim 1 wherein said at least two slots along one of said lengthwise sides of each of said plurality of structural members includes at least two slots which are located between the first outside slot and the second outside slot of each of the plurality of structural members.

8. The system for modular assembly of claim 7 wherein the plurality of structural members includes a third vertical structural member and a fourth vertical structural member; and wherein the first outside slot of the third vertical structural member is detachably connected slot-to-slot to one of said at least two slots which are located between the first outside slot and the second outside slot along one of said lengthwise sides of the first horizontal structural member and the second outside slot of the third vertical structural member is detachably connected slot-to-slot to one of said at least two slots which are located between the first outside slot and the second outside slot along one of said lengthwise sides in the second horizontal structural member such that the third vertical structural member is substantially parallel to the first vertical structural member and the second vertical structural member and substantially perpendicular to the first horizontal structural member and the second horizontal structural member; and wherein the first outside slot of the fourth vertical structural member is detachably connected slot-to-slot to one of said at least two slots which are located between the first outside slot and the second outside slot along one of said lengthwise sides of the first horizontal structural member and the second outside slot of the fourth vertical structural member is detachably connected slot-to-slot to one of said at least two slots which are located between the first outside slot and the second outside slot along one of said lengthwise sides in the second horizontal structural member such that the fourth vertical structural member is substantially parallel to the first vertical structural member, the second vertical structural member and the third vertical structural member and substantially perpendicular to the first horizontal structural member and the second horizontal structural member.

9. The system for modular assembly of claim 7 wherein the plurality of structural members includes a third horizontal structural member and a fourth horizontal structural member; and wherein the first outside slot of the third horizontal structural member is detachably connected slot-to-slot to one of said at least two slots which are located between the first outside slot and the second outside slot along one of said lengthwise sides of the first vertical structural member and the second outside slot of the third horizontal structural member is detachably connected slot-to-slot to one of said at least two slots which are located between the first outside slot and the second outside slot along one of said lengthwise sides in the second vertical structural member such that the third horizontal structural member is substantially parallel to the first horizontal structural member and the second horizontal structural member and substantially perpendicular to the first vertical structural member and the second vertical structural member; and wherein the first outside slot of the fourth horizontal structural member is detachably connected slot-to-slot to one of said at least two slots which are located between the first outside slot and the second outside slot along one of said lengthwise sides of the first vertical structural member and the second outside slot of the fourth horizontal structural member is detachably connected slot-to-slot to one of said at least two slots which are located between the first outside slot and the second outside slot along one of said lengthwise sides in the second vertical structural member such that the fourth horizontal structural member is substantially parallel to the first horizontal structural member, the second horizontal structural member and the third horizontal structural member and substantially perpendicular to the first vertical structural member and the second vertical structural member.