Cement Truck Weight

Well your steer axle is probably rated higher than 12,000 I'd guess
And gvwr has little to be do what's legal it's just a number the manufacturer came up with as to what they engineered the vehicle to withstand.
Every state it seems has different weight limit laws.

 

Usually, cement trucks will have the big floater steer tires that usually have a 20k rating as well.

 

State laws can assist the construction side.

NJ has ten wheel dump trucks that are allowed to run extra heavy while working the job but require them to be empty when traveling to a different job site. Nothing is truly impossible, it just costs extra.

 

When that truck came off the line it was nothing but a cab and chassis. The maker is required to put certain data inside the door. One thing they place there is the weight the chassis was built to hold. This is not the same thing as the axle limits. Don't get them confused!

 

It also depends on how far apart the axles are. If you could give us an idea of that, maybe we'd be able to help you more. There are different cement mixer designs, too. My best guess? Well, probably a super-single front axle=20k. Then the drives=34k. The "booster" is probably too close to the drives, so it only bumps-up the whole rear axle setup to 44k. I'm assuming it's a common rear-discharge version, so the wheelbase would be fairly short.

If you had something like a wester-style front-discharge with a longer wheelbase and a trailing, steering drop-booster and 2 front drop-boosters and a super-single steer, that would probably be something like 20k+10k+10k+34k+12k=86k. You can see setups like this in a lot of places in Michigan...