Attach the 3-foot board to the top of the 4-inch-by-4-inch beam, making a "T" shape. Use 8d nails and a hammer to join the two pieces.
Cut the beam so that it is approximately 4 to 6 inches shorter than the height of the room. For example, if the ceiling is 8 feet high, the beam should be cut to 7 feet, 6 inches. Use a circular saw for this cut.
Place the floor jack between 1 and 2 feet from the support column. Stand the 4-inch-by-4-inch beam on the floor jack with the wood board nailed to the top of the beam angled so that it is perpendicular to the ceiling studs. Use a stud finder to locate the direction of the ceiling studs. The board should support multiple studs.
Raise the jack until it contacts the ceiling. Continue to raise the jack a little more so that the ceiling or roof structure is supported by the jack.
Remove any decorative covers from the support column. A hammer and pry bar will make quick work of any plastic or vinyl veneers.
Cut the support column near the base with a reciprocating saw. Cut the column about 6 to 8 inches above the ground.
Grasp the upper portion of the column and pull it free from the ceiling. Use a pry bar to pull up the lower portion.