The arc is the footprint, not the frame.

A swinging child sweeps a long distance fore and aft.

That clear zone must stay free of other equipment.

It is why swings usually sit at a site edge.

Lay the swings out first.

Fitting them in last forces a redesign.

Seats follow ability rather than height.

Flat belt seats suit children who can hold on.

Cradle seats enclose a toddler entirely.

Nest seats take a child who cannot sit unaided.

They also take more than one child at once.

Mixing seat types within a bay is now normal.

They serve the widest range of children.

A child who cannot sit unaided can still use one.

Two children can share one seat.

Lying down is as valid as sitting.

They tolerate a wider range of ages.

Sites often find them the busiest item installed.

It is a maintenance decision more than a look.

Timber moves with moisture and weathers visibly.

Steel is dimensionally stable and shows scratches.

Both fail first where the frame meets the ground.

Ground-line treatment matters more than the material.

Ask how the ground fixing is protected.

Suspension bearings, chains and seats.

Bearings are the routine consumable.

Chains stretch and wear at the hanger.

Seats degrade under sun before they break.

Ask how bearings are replaced, not how long they last.

Replacement without dismantling the bay saves hours.

Chain and hanger detail decides it.

Open large-link chain traps small fingers.

Plastic-clad or small-link chain resolves it.

The top fixing should be reachable for inspection.

Worn hangers develop gaps that were not there originally.

It is a standing inspection item.

It follows the free height of fall.

The whole arc has to be surfaced, not just under the seat.

Loose fill migrates from under a busy swing.

That hollow is a frequent inspection finding.

Unitary surfacing avoids it at higher cost.

Budget for topping up if loose fill is chosen.