5. L OADING A ND U NLOADING T HE T RAILER Improper trailer loading causes many accidents and deaths. To safely load a trailer, you must consider the overall load weight and load distribution. The load distribution must be such that no component part of the trailer is loaded beyond its rating. You must be sure that the load distribution does not exceed the rating of the tires, wheels and axles.
^ WARNING
Collision hazard. An overloaded trailer can result in death or serious injury. Do not load a trailer so that the Gross Vehicle Weight Rating (GVWR) or Gross Axle Weight Rating (GAWR) is exceeded.
5.1 LOAD TRAILER
5.1.1 LOADING THROUGH MANHOLES 1. Park the truck and trailer on a firm surface and set the parking brakes. 2. Verify all discharge valves (A) are closed. See Figure 5-1.
Figure 5-1 – Discharge Valve Closed
NOTICE
Risk of trailer damage. Ambient temperature changes can result in pressure changes inside the hopper. If the blow down valve is not open, damage to the hopper may result. The blow down valve must remain open at all times except when the hopper is being pressurized for unloading or the trailer is being vacuum loaded.
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