Don-Bur Axle Load Calculator

This calculator determines the load (kgs) placed through kingpin and rear bogie of a trailer and outputs as a graphic image which can be saved or copied. If the trailer has more than one axle in the rear bogie, it will determine the load placed through the centreline of that bogie.

Some default values have been entered for convenience.

Title Add your own reference title

General Chassis Type Straight or step frame
Body Height Single (normal) or double deck
Trailer Length Total m
Operating GVW If required to determine payload potential kgs
Tractor Weight (Optional) If required to determine payload potential kgs
Trailer Tare Weight kgs
Distance from kingpin to front of trailer m
Max load imposed on kingpin kgs

Axles Axle Number Numeric (1-3)
Bogie Weight Including all componentry rear of vehicle centrepoint kgs
Bogie Capacity Total on all axles kgs
Kingpin to centreline of bogie front axle m
Front axle spread (If tandem or tri) Distance between front and 2nd axle m
Rear axle spread (If tri) Distance between 2nd and 3rd axle m

PAYLOADS: In many cases, the payload is split into individual blocks placed in different locations. For instance, a step-frame double deck has a load on the main lower deck, one on the fordeck and one on the top deck. Equally, if required, you can split a load on a straight-frame single deck into three individual partitions if your payload has uneven distribution.

If you only need one load calculating (such as a load evenly distributed on a straight-frame single deck), do not complete Loads 2 and 3.

Load 1 Distance from front of vehicle to front of load 1 m
Load Length m
Load Weight kgs
Height (above ground)

Load 2 (Optional) Distance from front of vehicle to front of load 2 m
Load Length m
Load Weight kgs
Height (above ground)

Load 3 (Optional) Distance from front of vehicle to front of load 3 m
Load Length m
Load Weight kgs
Height (above ground)

2nd Decking Weight (If applicable): Not load

NOTE: The secondary decking itself in double deck trailers may have a considerable impact on axle loadings - particularly on lifting decks. If you are calculating axle loads for a double deck trailer, please complete this section in addition to the load placed on it (sections above).

Distance from front of vehicle to front of deck m
Deck Length Total m
Deck Weight This value will be calculated as part ot unladen weight kgs

Axle Load Calculator (Options: Tractor, 2nd Deck + 3 Independent Load Objects)