Enter Drive Axle(s) Weight & Total Truck Weight. Steer Axle weight is calculated.
Enter the distance (Span) from the steer axle to the center of the tractor’s rear axle group.
Enter the distance from the center of the 5th wheel to the center of the rear axle group. Note a positive number indicates the 5th wheel is “ahead of center,” a zero indicates “on center” and a negative number indicates “rear of center.”
Enter Jeep Dolly information if it applies. If not, all entries must be set to zero.
Enter the distance (Span) from the Jeep Dolly kingpin to the center of the Jeep Dolly’s rear axle group. If Jeep Span = 0 then no jeep.
Enter the distance from center of Jeep Dolly 5th Wheel to Jeep Dolly Kingpin.
Enter overall (OAL) trailer length.
Enter the distance (Span) from the kingpin to the center of the rear trailer axle group.
Enter per axle weight of tires, wheels, axle & suspension if known. If not know 1850 is a good estimate.
Axle Configuration Examples: 3 axles close coupled, enter 3 and 0. For 3+1 spread axle, enter 3 and 1
Computer estimate for the weight of the trailer axles. Note: the above Total Trailer Weight, OAL, Span, Kingpin to Front of Trailer, Per Axle Weight, and Axle Configuration must be entered first before using this estimate.
To get total payload on trailer axles & trailer kingpin, you can input up to four load weights, thereby accounting for multiple machines, loads, etc. You must enter the payload center of gravity (COG) distance from the trailer kingpin to the balance point of the load.