area of the side surface 20 b the channel 26 may run a length of the side surface 20 b located in the channel 26 is a groove 28 the groove 28 is formed along a surface 26 b on the channel 26 the groove 28 may run the length of the channel 26 the plank member 20 may have one or more sides where a tab 30 may be formed the tab 30 may be formed along one or more side surfaces 20 b of the plank member 20 the tab 30 may be formed along a central area of the side surface 20 b the tab 30 may run a majority of the length of the side surface 20 b the tab 30 may have a locking member 32 which extends from the tab 30 the locking member 32 may be a locking tab 32 a which extends down from tab 30 in operation the tab 30 of one plank member 20 may be inserted into the channel 26 of a corresponding plank member 20 the locking tab 32 b may be slide into the channel 28 thereby forming a snap lock connection by lifting the plank member 30 the locking tab 32 b may be slide out of the channel 28 thereby unlocking the plank member 30 from the corresponding plank member 20 referring to fig6 another attachment mechanism 24 u2032 may be seen in.