GAV - Common Semi-trailer Combinations

General Access Vehicles (GAV) don't require a permit or notice to access road networks; these vehicles have as-of-right access to the network unless otherwise signposted. For a heavy vehicle to be considered a GAV, they must be within the size and weight range outlined below.

The following 3, 4, 5 and 6 axle semi-trailer combinations are General Access Vehicles (GAVs) when complying with the mass and dimension limits below. 

Description Image Max Length
(metres)
Max Mass - GML
(tonnes)
Max Mass - CML
(tonnes)
3 Axle Semitrailer General Access Vehicle - 3 Axle Semitrailer < 19.0 24.0 CML does not apply to single axles
4 Axle Semitrailer General Access Vehicle - 4 Axle Semitrailer < 19.0 31.5 32.0
5 Axle Semitrailer General Access Vehicle - 5 Axle Semitrailer < 19.0 35.0

36.0

5 Axle Semitrailer General Access Vehicle - 5 Axle Semitrailer 39.0 < 19.0 39.0 40.0
6 Axle Semitrailer General Access Vehicle - 6 Axle Semitrailer < 19.0 42.5 43.5

Note: In the above examples, a complying steer axle is permitted up to 6.5 tonnes on the steer axle provided it does not exceed the manufacturers rating. The Allowable GVM/GCM may then also be increased by up to 0.5 tonnes.

5 Axle Twinsteer Semitrailer   < 19.0

 

35.5 (NLS)

36.5 (LS)

36.0 (NLS)

37.0 (LS)

6 Axle Twinsteer Semitrailer   < 19.0

42.5

(NSL & LS)

43.5

(NSL & LS)

7 Axle Twinsteer Semitrailer   < 19.0

46.5

(NSL & LS)

47.5

(NSL & LS)

In the above examples, a twinsteer heavy vehicle fitted with load-sharing suspension system is permitted 11 tonnes on the steer axle, provided it does not exceed the manufacturers rating or GML stated in the table. 

NLS means a twinsteer with non-load sharing suspension. LS means a twinsteer with loading sharing suspension.


Note: Combinations operating at Higher Mass Limits (HML) are considered a Restricted Access Vehicle (RAV) and must comply with the relevant state notice or permit conditions.