Ladder support and movement assembly

An adjustable ladder system including:

• a ladder comprising a pair of side rails with a plurality of rungs extending between the side rails, with at least a bottom rung defining a through passage;
• and
• a ladder support assembly comprising:
• a base frame having first and second ends, a pair of side rails extending between the first and second ends, and at least one base frame cross brace extending between the pair of side rails,
• a pair of pivot supports extending from the base frame proximate the first end;
• a rod directly coupled to each of the pivot supports and spanning between the pivot supports, the rod extending through the bottom rung through passage;
• a pivot frame having first and second ends, a pair of side rails extending between the first and second ends of the pivot frame, and a pivot frame cross brace extending between the pair of side rails of the pivot frame, the pivot frame first end pivotally mounted adjacent the base frame second end, wherein the pivot frame is biased away from the base frame by a spring, wherein the spring extends between the at least one base frame cross brace and the pivot frame cross brace;
• a bracket assembly pivotally mounted to the pivot frame second end, the bracket assembly including a pair of bracket plates, with each bracket plate having an inner flange and outer flange with a ladder rail receiving area between the inner and outer flanges, each ladder rail received in a respective ladder receiving area such that the bracket plates are slidable relative to the respective ladder rail received therein;
• and
• a crank assembly including a spool rotatably supported on the base frame and a cord wound about the spool with a free end of the cord connected relative to the pivot frame, whereby rotation of the spool in a first direction takes up the cord onto the spool and causes the pivot frame to pivot toward the base frame, thereby raising the ladder toward a raised position, and rotation of the spool in a second direction opposite the first direction causes the cord to be let out from the spool and the pivot frame to pivot away from the base frame, thereby lowering the ladder toward a lowered transport position.