Recreational structure using a coupling member

A coupling assembly for a trampoline assembly with a first horizontal frame member, a second horizontal frame member, a vertical frame member, and a vertical pole member, the first and second horizontal frame members being arranged substantially along a horizontal frame axis, the coupling assembly comprising:

• a coupling device that includes:
• a first arm member comprising first and second ends, the first and second ends being arranged substantially along a first longitudinal axis, the first end including a first opening capable of receiving an end of the first horizontal frame member and the second end including a second opening capable of receiving an end of the second horizontal frame member,
• a second arm member capable of receiving the vertical frame member, the second arm member projecting substantially along a second longitudinal axis and in only one direction from the first longitudinal axis, and
• a side-sleeve member capable of receiving the vertical pole member, the side-sleeve member projecting substantially along a third longitudinal axis, the third longitudinal axis being different from the second longitudinal axis;
• and
• a tension member operable to couple to both the first and second horizontal frame members and that is operable to apply a force between the first and second horizontal frame members to compress the first and second horizontal frame members toward each other.