Hong Kong Regulations

ROAD TRAFFIC (CONSTRUCTION AND MAINTENANCE OF VEHICLES) REGULATIONS - REGULATION 14

Axle loading

(1) Subject to paragraphs (2) and (3), the weight transmitted to the road
surface by any one wheel of a vehicle where no other wheel is in the same line
transversely shall not exceed 4.5 tonnes and the total weight so transmitted
by any 2 wheels of a vehicle in line transversely shall not exceed 9 tonnes.

(2) The total weight transmitted to the road surface by any 2 wheels of a
vehicle in line transversely shall not exceed 10 tonnes if each such wheel is
fitted with 2 pneumatic tyres having the centre of their areas of contact with
the road surface not less than 300 millimetres apart measured at right angles
to the longitudinal axis of the vehicle or with a wide tyre.

(3) In the case of a vehicle having more than 2 wheels in line transversely,
the total weight transmitted to the road surface by those wheels shall not
exceed 11 tonnes.