Tandem Cheat Sheet?

Discussion in 'Experienced Truckers' Advice' started by madmoneymike5, Feb 28, 2012.

  1. iexcel4u

    iexcel4u Bobtail Member

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    Jul 6, 2014
    0
    Check your tandems first! Are they 4" on center holes - OR - 6" on center? 4" = 250lbs p/hole & 6" = 400lbs p/hole

    - Your kingpin is 3ft back from the front of the trailer (99.9% of time)
    - On a 53' trailer, the furthest back you can slide is 48' (kingpin to center rear axle)
    - On a 53' trailer, the furthest forward you can slide is 38' (kingpin to center rear axle) [Most Trailers]**
    - There is a distance of 3ft from center of tandems to center of rear axle

    With all that in mind:

    4" on center (holes)
    .....1.......................7..........10.11.....13.........16
    O..O..O..O..O..O..O..O..O..O..O..O..O..O..O..O..O..O..O..O..O..O..O..O..O..O..O..O..O..O..O..O
    X..38'........39'.........40'........41'.........42'........43'.........44'........45'.........46'........47'........48'

    6" on center (holes)
    ......1........................5....6.....7....8.....9...10...11
    O....O....O....O....O....O....O....O....O....O....O....O....O....O....O....O....O....O....O....O....O....O
    X....38'........39'........40'........41'.........42'........43'........44'........45'.........46'........47'........48'

    CA, RI - 40' Kingpin to Center Rear Axle
    IN, WI, NY, ME, CT - 43' Kingpin to Center Tandem
    UT, TN, AL, FL, NC, SC, VA, WV, MD, PA, VT, NH, NJ - 41' Kingpin to Center Tandem
    All Others - No Restriction (CAUTION - Must comply with Federal Bridge Law Tables) - http://ops.fhwa.dot.gov/Freight/publications/brdg_frm_wghts/index.htm

    http://www.bigtruckguide.com/kingpin-to-rear-axle/

    Hope this helps...
     
    Last edited: Jul 6, 2014
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  3. X-Country

    X-Country Medium Load Member

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    Mar 27, 2014
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