Building block set and method for building with such a block set

Claim 1

A wall construction comprising superimposed rows of hollow blocks into which binder, for example concrete, has been poured, said construction including two forms of block, a first form of block having cross walls and side walls which define a straight, rectangular parallelipiped which has a hollow volume extending through the whole height of the block, the side walls being extended at least at one end by two flanges whose length is a fraction of the length of the parallelipiped thereby defining a hollow volume which is short relative to the long hollow volume of said parallelipiped, and a second form of block of U-shaped horizontal cross-section having a cross wall and flanges whose outer surfaces are co-planar with the outer surface of the flanges of the first form of block, the blocks being positioned so that in each row long and short ones of said hollow volumes alternate and in successive rows the cross walls of each row, except the lowermost, are displaced horizontally relative to the cross walls of the next lower row by a distance of the order of the length of one of said short hollow volumes, said displacements in the consecutive rows being in the same direction towards one end of the wall construction, whereby both vertical shafts and slanting channels exist between said hollow volumes which facilitate the flow of said binder through said hollow volumes during said pouring.