frame 19 via lift pins 28 disposed on support beam 25 and 29 disposed on support beam 26 fig2 is a right side perspective view of the box blade 10 of fig1 the right side guard 16 is generally a mirror image of the left side guard 17 and comprises a generally thin and flat plate the right side guard 16 is rigidly affixed by welding for example to the rear side 30 of the box blade 10 and also to the horizontal support beam 18 in this embodiment the right side guard 16 comprises a generally flat bottom side 33 and a generally flat top side 34 which are generally perpendicular to a generally straight rear side 35 the frontward edge 24 has rounded corners 73 and 74 as shown the rear side 30 of the box blade 10 extends downwardly and forwardly and terminates in an inverted y shape in which a forward rear blade shaft 37 angles forward and a rearward rear blade shaft 38 angles rearward the forward rear blade shaft 37 and the rearward rear blade shaft 38 are formed from a single piece of angle iron turned with its u201c legs u201d downward in one embodiment.