Most States Have 20k/Single Axle Weight Limits -- Why Is This So High?

Discussion in 'Questions From New Drivers' started by Anon99, Aug 7, 2022.

  1. Anon99

    Anon99 Bobtail Member

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    In school, we learned that your steer axle should not exceed 12,000 lbs. However, doing a bit of research, only 3 states (MS, AR, IN) consider exceeding 12,000 lbs on the steers to be illegal. Most states seem to be OK with having a single axle weight up to 20,000 lbs. If I only drove in 20,000 lb limit states, should I even worry about being a little over 12,000 lbs? Also, the manufacturers maximum gross weight for my steers on my truck is 13,200 lbs.

    So, Could I run with say, 12,800 lbs on the steers, with no issue, but only in states with limits of anything over that?

    Thanks.
     
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  3. Siinman

    Siinman Road Train Member

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    Run all day long with what your axle and tires can do.
     
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  4. W923

    W923 Medium Load Member

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    Yes but only legally if your tires and axle are rated for 12800 or more
    Seems that a lot of trucks have axles rated around 12-14000 so look before dot looks for you
     
  5. Rideandrepair

    Rideandrepair Road Train Member

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    The reason it’s 20k is because it falls under the max. single axle rating. Instead of 34k max. for a set of tandems. A single axle Truck (or Trailer) is 20k. Any axle is still limited by axle and tire ratings. Same reason a spread axle trailer can have 20k on each axle, because they’re spread and each qualifies as a single axle, instead of a tandem set at 34k.
     
    Last edited: Aug 7, 2022
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  6. ZVar

    ZVar Road Train Member

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    And remember a typical OTR 53' van isn't the only option out there for "trucks".
    Stuff like cranes, cement haulers, tow trucks and other equipment can easily be rated for 20 front axles and tires.
     
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  7. kranky1

    kranky1 Road Train Member

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    As long as you have a 20k front axle with 445’s on it and 72” spread drives you can put 19,800 on the steer and 39,700 on the drives of a tractor here. Ontarios bridge formula and regs gives us way more weight intra-Ontario than what’s allowed Canada wide on the TAC schedule equipment. Pretty much the same as some State laws compared to what’s allowed on the Interstate system.
     
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  8. flood

    flood Road Train Member

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    You still can't go over 80k
     
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  9. ZVar

    ZVar Road Train Member

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    Depends on the state. For example MI you just toss on another axle and register the vehicle for the higher rate.
     
  10. kranky1

    kranky1 Road Train Member

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    Michigan you can go to around 148,000 in some counties. Washington, Oregon, Idaho and Montana you can go at least 105,000 because I was licenced for that in those states at one time. Most of the western states are up around 100,000 somewhere. Maine and Vermont are 100,000 on 6 axles.
     
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  11. Long FLD

    Long FLD Road Train Member

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    I’m ignorant of what’s allowed out east but these states will license over 80k gross. Some you need a permit, some you just need to raise your cab card. I’m not going to get into the bridge law and number of axles, etc, but stating you can’t go over 80k is wrong.

    MN IA ND SD NE KS OK MT WY CO ID WA OR
     
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