Mixin' it up…

When it comes to rear discharge mixer trucks, they are basically two classifications. Bridge formula and Standard. Each has a unique application, and neither could be considered most ‘universal’ as the configuration relates to the amount of weight one could haul, and where it could operate.

The Bridge Formula style creates a larger envelope for dispersing the weight. This is due to the trailing arm lift axle. This axle is lifted when on-site, as needed. Also, not the bumper setting, pushing it forward nearing 1.5 feet also increases the outer bridge measurement. Larger spacing between axles can result in fewer axles required.

The Standard style can have the addition of multiple lift axles. This is accomplished by adding wheelbase. But increasing wheelbase has a negative impact on maneuverability, so there is a limit to the payoff associated with this design. Additionally, all but one state enforces an overall length on trucks. Moving the bumper forward of the steer axle creates a negative impact on potential weight that can be carried. For this reason, you will rarely see a setback front axle on a Bridge Formula mixer. The combination would defeat the purpose.

And now…

---

Believe It OR Not

People often survive high G forces for very brief periods. We're all familiar with this to a certain degree. According to a 1994 article in the journal Spine, the average sneeze creates G forces of 2.9, a slap on the back 4.1, and a plop down into a chair 10.1.