A lightweight universal panel mat made of plastic or elastomeric material and having a first section that provides a relatively flat surface and provides a frame for receiving a plurality of removable panels that form a working surface within the panel mat. The panel mat includes a second section having geometry that supports the first section. The mats also include first, second, third and fourth sides forming a perimeter of the mat, wherein the first and second sides include upper structures having a sloped lower surface and the third and fourth sides include lower structures having sloped upper surfaces. The sloped surfaces are configured to allow for overlapping with sloped surfaces other like mats for interlocking therewith while forming a generally flat continuous top and bottom surface of the overlapped mats. The mats may be interlocked by a fastening member which fits in aligned openings of the adjacent mats for connection therewith.

An illustrative embodiment of a tile and support structure may include a plurality of tiles, which may be generally rectangular in shape, engaged with one or more support structures. The tile may be formed with four edges, wherein two opposing edges may be formed with grooves therein and the other two opposing edges may be formed with protrusions thereon. The support structure may be formed with a generally vertical spine having two rails extending outward from a distal end thereof. The support structure may also include two generally horizontally extending flanges, which may be formed with a trough therein. The trough may include a plurality of apertures formed therein. One side of the trough may be defined by a lip.

A deck board supporting system includes a plurality of interconnected skirt joists configured as an outer perimeter of the deck board supporting system and a plurality of deck joists configured to be attached to one or more of the plurality of skirt joists within the outer perimeter. Each of the skirt joist and deck joist has a respective longitudinal groove formed on a respective top surface, and the longitudinal groove extends downwards perpendicular to the respective top surface. The longitudinal groove is configured for receiving one or more fasteners for connecting one or more deck boards to the top surfaces of the respective skirt joists and deck joists.

An illustrative embodiment of a tile and support structure may include a plurality of tiles, which may be generally rectangular in shape, engaged with one or more support structures. The tile may be formed with four edges, wherein two opposing edges may be formed with grooves therein and the other two opposing edges may be formed with protrusions thereon. The support structure may be formed with a generally vertical spine having two rails extending outward from a distal end thereof. The support structure may also include two generally horizontally extending flanges, which may be formed with a trough therein. The trough may include a plurality of apertures formed therein. One side of the trough may be defined by a lip.

An illustrative embodiment of a tile and support structure may include a plurality of tiles, which may be generally rectangular in shape, engaged with one or more support structures. The tile may be formed with four edges, wherein two opposing edges may be formed with grooves therein and the other two opposing edges may be formed with protrusions thereon. The support structure may be formed with a generally vertical spine having two rails extending outward from a distal end thereof. The support structure may also include two generally horizontally extending flanges, which may be formed with a trough therein. The trough may include a plurality of apertures formed therein. One side of the trough may be defined by a lip.

A set of building panels including a locking device for locking a first edge portion of a first panel to a second edge portion of a second panel. The locking device includes a locking element extending upwards from a lower strip provided in the first edge portion, and a locking member extending downwards from an upper strip provided in the second edge portion, wherein the locking element and the locking member are configured to cooperate for horizontal locking. The locking device further includes a protrusion and a groove configured to cooperate for vertical locking. A perpendicularly arranged fourth edge portion of the second panel includes a tongue configured to cooperate with a tongue groove of an adjacent panel for vertical locking. The protrusion extends inwardly of the tongue in a direction along the second edge portion.

An illustrative embodiment of a tile and support structure may include a plurality of tiles, which may be generally rectangular in shape, engaged with one or more support structures. The tile may be formed with four edges, wherein two opposing edges may be formed with grooves therein and the other two opposing edges may be formed with protrusions thereon. The support structure may be formed with a generally vertical spine having two rails extending outward from a distal end thereof. The support structure may also include two generally horizontally extending flanges, which may be formed with a trough therein. The trough may include a plurality of apertures formed therein. One side of the trough may be defined by a lip.

An illustrative embodiment of a tile and support structure may include a plurality of tiles, which may be generally rectangular in shape, engaged with one or more support structures. The tile may be formed with four edges, wherein two opposing edges may be formed with grooves therein and the other two opposing edges may be formed with protrusions thereon. The support structure may be formed with a generally vertical spine having two rails extending outward from a distal end thereof. The support structure may also include two generally horizontally extending flanges, which may be formed with a trough therein. The trough may include a plurality of apertures formed therein. One side of the trough may be defined by a lip.

An illustrative embodiment of a tile and support structure may include a plurality of tiles, which may be generally rectangular in shape, engaged with one or more support structures. The tile may be formed with four edges, wherein two opposing edges may be formed with grooves therein and the other two opposing edges may be formed with protrusions thereon. The support structure may be formed with a generally vertical spine having two rails extending outward from a distal end thereof. The support structure may also include two generally horizontally extending flanges, which may be formed with a trough therein. The trough may include a plurality of apertures formed therein. One side of the trough may be defined by a lip.

An illustrative embodiment of a tile and support structure may include a plurality of tiles, which may be generally rectangular in shape, engaged with one or more support structures. The tile may be formed with four edges, wherein two opposing edges may be formed with grooves therein and the other two opposing edges may be formed with protrusions thereon. The support structure may be formed with a generally vertical spine having two rails extending outward from a distal end thereof. The support structure may also include two generally horizontally extending flanges, which may be formed with a trough therein. The trough may include a plurality of apertures formed therein. One side of the trough may be defined by a lip.