Abstract: A module mat system with first layer that is joined to a second layer by fusion welding, hot welding, hand welding, seam welding, heat pressing, or other methods know to those having skill in the art. Each layer has a central core with a first cellular structure formed from ribs extending from the interior surface. The cross section of the ribs in the central core of the first layer matches the cross section of the ribs in the central core of the second layer such that when fusion welded together the ribs of the central core of the first layer weld to the ribs of the central core of the second layer.

Abstract: A fastening device system for connection at least a first and a second overlapping mats placed on the ground wherein the first mat is aligned over at least one connecting hole of the second mat, the fastening device system comprising, a housing having a first half and a second half wherein the first half and second half are attached together forming the housing. A pin having a foot disposed at the lower end thereof and a shaft having a helical shelf that engages the helical channel of the housing. The pin is configured so that when it rotates 90° in one direction to the housing the pin draws the foot closer to bottom of housing and provides at least one locking position of the foot and locking the foot in place.

Abstract: A traction mat system and a method of manufacturing comprising a mat having a grip layer adhered to or mate integral to the surface of the mat. The grip layer can be a textured material foil sheet combined to a top surface and/or a bottom surface of the mat system. The texture of the grip layer is retained when the mat is contoured with a raised pattern to give the entire surface of the mat a texture to improve traction and grip. A method of manufacturing comprises a traction mat system wherein the traction mat can comprise of manufacturing step for placing a grip layer on the mat surfaces, for placing the foil sheet and/or aggregate on the mat. Each operation can be performed for both surfaces simultaneously or can be its own operation such as one surface at a time, or both surfaces at once.