Noted as the first mass-market car with an aluminium chassis, all A8 models have used this construction method co-developed with Alcoa and marketed as the Audi Space Frame.
The hull body is around 4m, But we accept OEM , and we can proceed exactly as the drawing you offered. The materials is composite clip net fabric PVC,which great support the construction , our manufacture has passed CE and ISO certification, both will off
The designed height off ground for WTJ3600TKT hand-pushing passenger stair is 3600mm, which could be slightly adjusted for height tolerance between passengers stair and hatch