1. Tier / Row Core Dimensions

Row riser height (step height): 300–350 mm (standard); 260 mm for low-profile options

Row depth (platform tread): 850–900 mm (full extended)

Seat center-to-center width: 460–500 mm per spectator (HDPE blow-molded seat)

Seat board width: 420–450 mm

Aisle width: Minimum 900 mm; standard 920–1000 mm for emergency exit

2. Overall Dimensions

Length: Modular, customizable from 2m up to 80m (each module 1–6m)

Extended total depth: Depends on rows. Example: 5 rows ≈ 4.2–4.5m

Retracted folded depth: Only 300–500 mm (wall-mounted type)

Total height: 1.25m (3 rows) up to 2.75m (6 rows)

Rows: Typical range: 3 ~ 6 rows; can customize up to 10+ rows

3. Key Notes

1. Operation type: Manual or electric retraction; electric models need extra space for motor & guide track.

2. Load standard: 500 kg/m² uniformly distributed live load for sports hall use

3. Compliance: CE / ICC300 safety standards; guardrail height ≥1100mm on rear & side.

4. Customization: All dimensions can be adjusted based on venue floor space, sightline calculation and local building code.