kinds of blocks equipped with coupling means of the present invention except for the ending block 952 which has no channel 302 whatsoever c the slope 205 of the trapezoidal prisms 200 is steeper for the lightened block 951 than for the plinth block 950 starting from the bottom base of the bridge 206 towards the lower edge 121 of the rectangular prisms 100 thereby forming the cavity 300 the protruding bases 207 allow the lightened block 951 to be placed on a previous course of plinth blocks 950 or on a previous course of lightened blocks 951 or a previous course of a combination of any of the blocks equipped with coupling means except for the ending block 952 while automatically aligning itself with said previous course prior to its placement it is necessary to fill the channel 302 of said previous course with adhesive 301 by placing the lightened block 951 the bases 207 displace the adhesive 301 horizontally on the channel 302 distributing it along the cavity 300 the side faces of the bases 207 placed adjacent to the channel 302 walls of the blocks equipped with coupling means from a previous course have an inclination from the lower edge 121 of the rectangular prisms 100 and towards the center wherein said inclination is equal to the inclination of the walls 304 of the channel 302 allowing the blocks equipped with coupling means from one course to fit in the channel 302 of the blocks equipped with coupling means from the course immediately below in another embodiment of the lightened block 951 cavity 300 is not present so that the base 207 is unique and extends longitudinally along the bottom of the block equipped.