Steps in Calculating Weight Distribution

Steps in Calculating Weight Distribution
1. Determine the weight and center of gravity location for all of the components and items to be considered.2. Multiply the center of gravity distance times the weight to get the moment for each component and item.3. Add all of the moments and divide by the wheelbase to get the weight on the rear axle.
  1. Subtract the rear axle weight from the total weight to get the front axle weight.
AB – Center of front axle to back of cab AF – (After Frame). The distance from the center of the back axle to the rear end of the chassis frame. BA – Bumper to an axle BL – (Body Length). An overall length of the body. CA – (Cab to Axle). Distance from back of the cab to center of the rear axle. CB – (Cab to Body). The distance between the back of a cab to the front of the body. WB – (Wheelbase). Distance from center of the front axle to center of rear axle. Example 1: Steer: 11,590 Drives: 34,700 Trailer: 32,100 Gross: 78,390 You scale your truck at a truck stop and receive your scale ticket. The slider rail hole spacing is 6 inches which will move 400 pounds of weight per hole, and let’s assume the steer axle weight won’t change. What would you have to do in order to get your truck legal? Steer 11,590 Steer remains unchanged for this example Drives 33,900 Drives: 34,700 – 800 (2 holes x 400 pounds each) Trailer 32,900 Trailer: 32,100 – 800 (2 holes x 400 pounds each) Gross 78,390 Remains the same Example 2: Steer: 11,320 Drives: 31,300 Trailer: 35,050 Gross: 77,670 You scale your truck at a truckstop and receive your scale ticket. The slider rail hole spacing is 4 inches which will move 250 pounds of weight per hole, and let’s assume the steer axle weight won’t change. What would you have to do in order to get your truck legal? In this example, the trailer tandems are overweight (34,000 pound maximum) by 1,050 pounds. Assuming each hole in the tandem slider rail moves 250 pounds, you would have to slide your trailer tandems toward the rear of the truck a minimum of five holes to transfer enough weight from your trailer tandems to your drive axles in order to get your axle weights legal. The end result would be approximately: Steer 11,320 Steer remains unchanged for this example Drives 32,550 Drives: 31,300 + 1,250 (5 holes x 250 pounds each) Trailer 33,800 Trailer: 35,050 – 1,250 (5 holes x 250 pounds each) Gross 77,670 Remains the same.TRAILER CAPACITIES
  1. Maximum weight is 46,500 lbs. per trailer (48’ or 53’).
  2. 22-24 single-stacked standard (48×40”) pallets in a 48’ trailer.
  3. 26-28 single-stacked standard (48×40”) pallets in a 53’ trailer
  4. Every two single-stacked standard pallets take up 4 linear feet of truck space
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