Search CBH Group
You are not logged into LoadNet [Access LoadNet]

Harvest Mass Management Scheme 


The Harvest Mass Management Scheme (HMMS) recognises that trucks are often loaded under imperfect conditions.  The Scheme provides growers and transporters a level of flexibility at harvest to provide a practical way to manage this issue, whilst also reducing the number of overloaded trucks.

The HMMS provides a tolerance of up to 10% of the vehicle's overall mass, capped at the safe working limit of the respective truck or 10 tonnes (whichever is the lesser) and a maximum of five 'non-compliance' strikes before suspension from the Scheme. If Main Roads WA finds that greater than 20% of a truck's deliveries were more than 7% above the legal limit (VSR or VRL), then Main Roads WA may exclude that vehicle from the scheme next year.

The Scheme runs from October to the end of February each year.  As part of the Scheme, all truck owners are required to register their vehicles before delivery. All trucks are required by Main Roads WA to carry a copy of the Special Government Gazette and a Carter's Delivery Form (CDF).

To learn more about HMMS download the Frequently Asked Questions here >

Download the Special Government Gazette here >

Download the Main Roads Business Rules here >

Higher Mass Limits for Single Steer Trucks

Main Roads WA have provided an 'Exemption Notice' to allow suitably equipped trucks and prime movers to exceed the statutory 6.0 tonne steer axle mass limit, provided it complies with the following conditions:-

a) The vehicle is fitted with suitably rated tyres having a width dimension of at least that specified in (c) below, together with complying rims; and

b) The vehicle has the capacity to carry the additional load without any modifications, unless the modifications have been approved by the Director General of Transport; and

c) The single steer axle mass does no exceed -

  • 6.5 tonnes when tyres with a minimum width of 295 mm are fitted, or
  • 6.7 tonnes when tyres with a minimum width of 375 mm are fitted.

It is important for growers and transport operators to read and understand the Exemption Notice, including when the exemption does and does not apply and providing evidence for conformance.

For further information on the Exemption Notice please click here >

Current system limitations means CBH can only cater for the exemption that allows and extra 0.5 tonnes. If trucks are already registered with FUPS they cannot also claim the extra mass under the Exemption Notice.

If growers and trasnport operators would like to register using the Exemption Notice and do not currently have FUPS, please fill out an updated Truck Registration Form and return it to CBH or update your registration online through LoadNet®.

Truck Registration

To participate in the scheme trucks must be registered with CBH.

Download the Truck Registration form here >

Load Forfeiture Approval

To forfeit overloaded grain a forfeiture approval must be provided by growers which provides CBH with the authority to receive the forfeited grain. This can be done by either signing the Load Forfeiture Approval section on the Carter's Delivery Form (CDF) or pre-registering with the Forfeiture Approval Authority (FAA).

A signed Load Forfeiture Approval on the CDF will over-ride any pre-registered FAA.

Download the Forfeiture Approval Authority form here >