comprises a top surface 43 four sides 39 and a bottom surface 51 each block 23 in a foundation assembly 21 rests with its bottom surface 51 see fig2 in contact with the top of a supporting ground surface 31 the blocks 23 do not need to sit in a dug out recess in the ground surface 31 the ground surface 31 may however comprise compacted gravel or other grading material there are no foundation strengthening elements extending downward from the bottom surface 51 and penetrating the ground and there are no steel attachment elements through the sides 39 of the blocks attaching one block to another each block 23 is located side by side with at least one other block 23 in the implementation shown four blocks are arranged in a two dimensional rectangular array with inner facing corners nearly touching one another at a location 45 sealant 35 protects gaps 37 that are between the blocks 23 protecting them from downward and sideways entry by environmental elements or by terror related encroachments a gap 37 is shown in fig2 in some implementations the body 25 of each block is made of concrete whether made of concrete or not the body 25 is precast at a different location than that of its installation as part of a foundation extending from the top surface 43 of each block shown are four mounting studs 27 spaced apart from one another and about the location of a conduit section 29 which also extends through the top surface 43 of each block shown an advantage of this implementation is that each.