Document storage rack conversion apparatus

A rack system comprising:

• a storage rack frame comprising:
• at least four spaced apart uprights, each residing approximately vertically and forming a rectangle;
• at least two pairs of lateral beams longitudinally spaced apart and approximately parallel, the at least two pairs of lateral beams supported by the uprights and defining approximately horizontal planes;
• and
• stepped shoulders on an inside upper edge of each lateral beam;
• four lateral tracks supported by the stepped shoulders of the lateral beams;
• three lateral rows of bins comprising:
• two rows of each a number N minus one of forward bins laterally slidably cooperating above the four lateral tracks to allow lateral movement of the forward bins within each of their two respective rows;
• and
• a row of the number N of the rear bins residing behind the two rows of forward bins, wherein the rear bins have approximately the same width as the forward bins, wherein the rear bins slidably cooperate with longitudinal tracks to slide the rear bins forwards and rearwards in a direction orthogonal to the lateral movement of the forward bins.

A rack system comprising:

• a storage rack frame comprising:
• at least four spaced apart uprights, each residing approximately vertically and forming a rectangle;
• at least two pairs of lateral beams longitudinally spaced apart and approximately parallel, the pairs of lateral beams supported by the uprights and defining an approximately horizontal plane;
• stepped shoulders on an inside upper edge of each lateral beam;
• and
• decks supported by the stepped shoulders;
• twice a number N of longitudinal tracks carried by the lateral beams;
• four lateral tracks supported by the decks;
• three lateral rows of bins, each bin having an approximate bin width W and comprising:
• two rows, each row having the number N minus one, of forward bins slidably cooperating above the four lateral tracks to allow lateral movement of the forward bins within each of their respective rows;
• and
• a row of the number N of the rear bins residing behind the two rows of forward bins and longitudinally slidably carried by the longitudinal tracks, wherein the number and the widths of the bins is selected to allow the rear bins to slide forward through a space provided by laterally sliding adjacent forward bins apart.