Method and apparatus for construction mats

A modular construction mat system comprising:

• a. a substantially rectangular upper layer mat having an upper layer top, an upper layer bottom, and a first plurality of walls extending downwardly from the upper layer bottom which define a plurality of upper layer enclosed cells;
• b. a substantially rectangular lower layer mat having a lower layer top, a lower layer bottom, a second plurality of walls extending upwardly from the lower layer top which define a plurality of lower layer mat enclosed cells, wherein the first plurality of walls of the upper layer mat are aligned with the second plurality of walls of the lower layer mat;
• c. a floating nut system for affixing the upper layer mat to the lower layer mat, wherein the mats are offset relative to one another such that two adjacent edges of the lower layer mat form a lower peripheral extension along two adjacent sides, and two edges of the upper layer mat form an upper peripheral extension along the remaining two sides, wherein the floating nut systems are used to affix the lower and upper mat peripheral extensions to create complete modular mat systems.