• Corridor width: Minimum 80 cm (ideal ≥ 1.2 m).

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• Floor slope: ≤ 5°; keep thresholds smooth (unevenness ≤ ~7 mm).

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• Surfaces: Hard floors preferred; carpet ≤ 10 mm pile, avoid slippery finishes.

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• Environment: Indoors, 0–50 °C, clean & dry floor; keep cables and sharp debris off the path