to draw the planar member 18 of the floor plate assembly and the joist together so as to tighten the floor against the joist it will also be noted from the fig1 illustration that a washer in 28 is interposed between the nut 26 and the second end of the joist strap 24 this washer facilitates tightening of the nut referring now to fig2 there is shown a top plan view of one embodiment of planar member 18 of the floor plate assembly in the illustrated embodiment the planar member 18 includes four holes 30 therethrough each hole is configured to allow the shaft of a wood screw to pass therethrough but is made small enough so as to retain the head of the screw in this manner the holes 30 may be used in conjunction with the screws to mount the planar member 18 onto the bottom surface of the floor it is to be understood of course that the planar member may take other shapes and that a greater or lesser number of holes may be included and that the planar member 30 may be affixed to the floor by nails adhesive or other such means the central portion of the planar member 18 includes a depressed region 32 configured to receive the head of a carriage bolt this depressed portion also includes a generally square opening 34 therein as is generally known to those of skill in the mechanical arts carriage.