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Design a vertical suspension system for hanging a hammock from joists.

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hammock

  • Use the notebook to compute the suspension loads.
  • Adjust occupant weight and ridgepole diameter, length, and modulus.
  • Rigging between the ridgepole and the rest of the suspension transfers no appreciable moment (simply supported).
  • Longer ridgepoles allow for shallower hammock suspension angles (30º is ideal).
  • Shallower hammock suspension angles increase the buckling stress in ridgepole.
  • Pre-drill holes for eye screws (15/64" for 3/8" screw).
  • Anchor hitches everywhere.
  • Ringbolt hitching around suspension joint rings optional but helps cord used to transfer center lateral load along neutral axis of ridgepole.
Quantity Item
1 8 foot long ⨉ 1-5/16" diameter oak closet rod (sub-optimal but accessible)
2 3/8" thick ⨉ 4" long eye lag screws
2 3/8" thick ⨉ 3" diameter rings
1 ~25 ft Amsteel 7/64" rope
6 caribiners (optional)

Hammock and suspension
Detail view of suspension joint

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Design a vertical suspension system for hanging a hammock from joists.

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