electrical box 48 is shown embedded in the panel 12 and it is often on the interior surface of the panel an electrical conduit 50 is joined to the box and it extends upwardly through the top edge of the panel after the four walls of the building 10 are assembled together the electrician may feed electrical wires through the various conduits for wiring the building with an electrical service these electrical components 48 and 50 are by way of example only other modifications may include water or gas pipes drains faucets heaters cabinets and the like now turning to a consideration of the side elevational view of the panel 12 of fig3 the panel 12 is shown supported in a groove 54 in the footing 56 of the foundation of the building the straightness and level of the base 58 of this groove 54 are critical factors in the success of this preformed structural wall invention because the panel is seated on this base 58 one successful procedure has been to pour a partial footing up to the line 60 that coincides with the base line 58 and at the same time install spaced vertical threaded rods 61 see fig7 through 10 in the footing 56 extending up from the base line 58 then install a channel.