u2032 rather than four precast blocks the building 71 can be secured to the foundation assembly 21 u2032 by means of mounting studs 27 extending from the top of the block similar to studs 27 shown in fig1 and utilities can be fed into the building 71 by way of a conduit section 29 similar to a conduit section 29 shown in fig1 utility supplies and hardware can be kept in a utility cavity 53 similar to a cavity 53 as shown in fig2 fig7 shows an example of a utility access door 49 located on the bottom of the block 23 u2032 that is shown in fig6 fig7 is a cross sectional view of the foundation assembly 21 u2032 shown in fig6 with the view taken as indicated by the arrows numbered u201c 7 u201d in fig6 this view shows the supporting ground surface 31 and the bottom surface 51 of the block contacting the supporting ground surface 31 a utility cavity 53 is shown in the block 23 u2032 and the utility access door 49 provides access to it also shown are a conduit section 29 which intersects the inner space of the cavity 53 and mounting studs 27 providing an access door 49 beneath a foundation block provides maximum protection against terrorist threats.