Weight distribution is essential for safe and efficient vehicle operation. Heavy loads concentrated over the rear axle may cause lightening of the front axle, resulting in loss of steering control, steering “play,” front-axle bounce, brake chatter, and front-wheel lockup. Heavy loads on one side can result in damaged springs, excessive tire wear, and steering pull. Excessive weight in the nose has caused trailers to tip. (See Exhibit 243.1.)
Exhibit 243.1
Improper Weight Distribution
You must know and follow the weight limitation of your vehicles. Publications, magazines, catalogs, and similar items may weigh up to 50 pounds per cubic foot, and may far exceed the weight capacity of the vehicle. Limit loads of this nature to one-half of the vertical inside height of the vehicle. Exceeding this limitation can break springs, bend frames, split floors, and blow out tires, as well as dangerously change the center of balance. An example of balanced loading is shown in Exhibit 243.2.
Exhibit 243.2
Balanced Load
Secure bed-loaded sacks with shoring bars or shoring straps to prevent them from shifting during transit and wedging against doors. (See Exhibit 243.3.)
Exhibit 243.3
Securing Bed-Loaded Sacks with Shoring Bars
