Building door unit
FIG. 1 is a perspective view of a building door unit incorporating the new design; 
     FIG. 2 is a right side elevational view thereof, the left side being a mirror image thereof; 
     FIG. 3 is a rear elevational view thereof; 
     FIG. 4 is a bottom view thereof; 
     FIG. 5 is a cross-sectional view thereof taken along the line 5--5 of FIG. 1; and 
     FIG. 6 is a cross-sectional view thereof taken along the line 6--6 of FIG. 1.