Shanti Tower
Eye bolts, rung spacing and footings deep enough that the tower stays where you built it.
A swing hanger is only as strong as its bolt and beam together. The rated pairing is a 5/8 in (16 mm) eye bolt through a 2x6 (38 x 140 mm) beam; the smaller 5/16 in (8 mm) eye bolt is rated only for a 2x4 (38 x 89 mm). Anything less is a guess, and swings do not forgive guesses.
The beam above the hangers matters as much as the bolts. As set out in Beams, Joists and Coastal Fastenings, swing loads push the beam section up to a 2x8 (38 x 184 mm) even where a 2x6 would carry the deck alone.
On narrow screens, swipe or scroll the plate sideways.
Rope ladders have their own geometry. Rungs sit 25-30 cm (10-12 in) apart vertically — close enough for short legs, far enough that a foot does not tangle — and a 600 mm wide ladder opening admits an adult hand and a child's shoulder, which is what a rescue reach needs.
Under everything, the footings. Posts go 900 mm (36 in) deep and at least 300 mm (12 in) across, always below the local frost line, and the post bolts to the concrete with 5/8 in (16 mm) galvanised anchor bolts. Footings stopped shallow are the reason towers lean after their first winter.
Once the hardware is in, the clearances from Deck Height, Guardrails and the Use Zone close the loop: swings sweep into the same 6 ft (1.8 m) use zone as the tower, so hang them where their arc stays inside clear ground.
Further reading