Recent content by mar128a

  1. M

    Lifting a 100 lb aluminum communications tower with pulley and winch

    The winch will be a crank type not with electric motor since it is used rarely. I am thinking now of terminating the cable at the tower and putting a pulley at the holding bracket and another at the tower, so the winch will wind the steel cable from the pulley at the tower in a more esthetic...
  2. M

    Lifting a 100 lb aluminum communications tower with pulley and winch

    Per '5' Agreed, the tower is always secured in position to the bracket with 2 stainless steel U-Bolt clamps when in the vertical position. The advantage is that now the Tower will stay in position, while the the U-Bolt clamps are being attached, an additional safety measure. So based on the...
  3. M

    Lifting a 100 lb aluminum communications tower with pulley and winch

    What would be the actual formula to calculate the stress on the cable, pulley, and Bracket? Not knowing the formula at this time, I am thinking that the stress is worse case at Horizontal and progressively gets lower as the center of gravity shifts downward toward the base, is it a correct...
  4. M

    Lifting a 100 lb aluminum communications tower with pulley and winch

    Hello, Yes the tower is a Lattice type made of aircraft aluminum with a width of 14.5" outer section, the inner is 9.5". The name of the tower is; "Aluma Towers" T-40-H, its actual weight is 72 Lbs. To make the math easier, I picked 100 Lbs. since the additional antenna would increase the...
  5. M

    Lifting a 100 lb aluminum communications tower with pulley and winch

    I am getting a bit older, and I have a Aluminum Communications Tower, and used to angle it up by myself from the back of the house to the side. Now I would like to lift the tower to its vertical position on the side of the house using the existing aluminum angled bracket plasma welded to a...