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  1. #1

    Default gooseneck trailer design questions

    i found a great deal on some 10 c channel 15.3 lb /ft. I am thinking about useing it to make a low boy gooseneck trailer 32 ft long. I was thinking about just useing it and 3" c channel crossmembers every 18 in. with a wood deck. does this seem like it would be strong enough to hold two cars? and either 6 or 7k axles.
    Last edited by wannabefastcrf; 02-17-2010 at 01:48 AM.

  2. #2
    Join Date
    Jul 2006
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    1,508

    Default

    First thing the 3-inch C-channel cross members should be no more than 16-inch centers if using 2 x ? wood decking.
    Caution!
    These are "my" views based only on my experiences in my little bitty world.

  3. #3
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    Jul 2006
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    Default

    The 10-inch C-channel seems really light for a 32-foot trailer, might want to think about a truss.
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    Caution!
    These are "my" views based only on my experiences in my little bitty world.

  4. #4
    Join Date
    May 2009
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    The Colorado Gas Patch
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    185

    Default

    I'm with sonora on the "Little Lite" comment.. the 10 x 15.3 C you mentioned is what I used on my tongue. I used a 12 x 19 I beam on the main frame and put a truss under it as well.. I am running 2 12K HD Disc brake axles under mine..

    You mentioned 7k axles.. triple singles @ 3K / tire weight rating = 18K less approx 7k of trailer = 11K in cargo +/- what is on the truck springs..

    The torque tube sonora mentioned will give you a better on highway handling ..

    Here is my 42' GN it has the 1 1/2" T&G Rumber decking with the cross-members on a 12" CL:

    Last edited by Pass-N-Gas; 02-17-2010 at 12:01 AM.
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  5. #5

    Default

    good comments, the light comments are my concern too. but when i search gooseneck car trailers it seems most of them are made out of 8 or 10 in c channel. so now im still confused

  6. #6
    Join Date
    Jul 2006
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    Default

    Dont panic yet!
    Give us a little more information.
    You say 32-feet long, is that total length from gooseneck receiver to the back? Or 32-feet of deck? Seems as most gooseneck A-frames are 8-feet long, and with a 60 / 40 ratio, you maybe looking at around 14-feet of span on your 10-inch C channel! Two 10x15.3# C channel with a span of 14-feet are good for 12,800-pounds. See how it would help with a little more information? And a drawing, well cant beat a drawing!


    Changing your 3-feet span on the decking to 18-inches makes me look foolish for posting 16-inches max!
    Caution!
    These are "my" views based only on my experiences in my little bitty world.

  7. #7
    Join Date
    Jan 2010
    Location
    Mesa, AZ
    Posts
    20

    Default What size?

    What size cars are you hauling? 2 compacts or 2 current fullsize? 70's fullsize? Are you going to ramp on the tongue or both flat after the tongue?
    Pontiac Freak

  8. #8
    Join Date
    Dec 2007
    Location
    Baldwin, NY
    Posts
    275

    Default

    The 32 foot deck, 40 ft overall 2 car 5 th wheel I built runs four 6" x 10.5 lb channel lengthwise, and 3" x 4.1 lb cross members doubled up every 3' approx. It has 2 7 k axles and has hauled hundreds of cars. There are companies building 32 footers with single 6 x 10.5 channel, which seems unsafe. I think your channel would work
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  9. #9

    Default

    10" channel main frame 82" wide 32' with 3" crossmembers 16" spacing . Go with 7k axles 95" hub face 80" spring center [6k & 7k axles price are about the same] plus you will need the extra GVWR . IT will work.

  10. #10
    Join Date
    Jul 2006
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    Quote Originally Posted by Ingle's Trailer Sales View Post
    10" channel main frame 82" wide 32' with 3" crossmembers 16" spacing . Go with 7k axles 95" hub face 80" spring center [6k & 7k axles price are about the same] plus you will need the extra GVWR . IT will work.
    Two 10 x 15.3# C channel 25-feet span are good for 7,100-pounds with 1.29-inch deflection!
    Caution!
    These are "my" views based only on my experiences in my little bitty world.

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