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Mounting flatbed on 96 F350, gap & bolts???

Discussion in 'Ford Trucks' started by Flyboy77, Nov 13, 2015.

  1. Flyboy77

    Flyboy77 Senior Member
    Messages: 139

    I'm mounting a Flatbed on my 96 F350 SRB truck. Sample attached, 4x4 is temporary, will use the tubing as seen with the angle cuts.

    1. How big should the gap be between the cab and the bed?

    2. When bolting on plates to the frames (bed & truck) to hold the bed on should I use Grade 8 bolts or Grade 5?
    I read on the interwebs that Ford Outfitters recommends no thicker than 1/4" plate, so I'll be using 1/4" plate. Also read that they recommend no holes bigger than 1/2" drilled into the frame, so I'll use bolts smaller than that, probably 3/8". But wasn't sure if I should have some chance that they might shear if it takes a large hit as opposed to jacking the frame.

  2. TJS

    TJS PlowSite.com Addict
    Messages: 1,440

    Throw some hinges on the back, get a scissor and a hyd. pump and make it dump. You will be glad you did.
    See my sig.
  3. mpriester

    mpriester Senior Member
    Messages: 424

    I'd use the space between the tire and bed as a guide and 6 or 8 half inch grade 5 bolts.
  4. Flyboy77

    Flyboy77 Senior Member
    Messages: 139

    I meant the gap between headache rack and cab, to allow frame to flex and bed not to contact cab. My apologies for lack of clarity.
  5. TJS

    TJS PlowSite.com Addict
    Messages: 1,440

    3" or so. That is what mine is.
  6. tjctransport

    tjctransport PlowSite.com Addict
    Messages: 1,390

    i normally set 3 or 4 inch gap between cab and bed. do not use 3/8 bolts, they are too small. use 1/2 inch grade 5 or better bolts in the existing bed mount holes.
  7. kimber750

    kimber750 PlowSite Veteran
    Messages: 4,681

    Drills holes down through the flat bed? I don't think so. Most flat beds are mounted with plates and some with large u bolts.

    I used 6 3/8" plates with 4 5/8" bolts per plate. 2" from the cab.


  8. tjctransport

    tjctransport PlowSite.com Addict
    Messages: 1,390

    since the flat bed is going to be 3 inches too narrow to fit on the pickup frame unless it was made for that frame, i would use bolts through the adapter plates, or custom bend a set of u-bolts.
  9. Flyboy77

    Flyboy77 Senior Member
    Messages: 139

    Thanks all!
    Yes it was made for a cab and chassis and mine is SRB. So I'm using C-channel as a spacer on the bed frame to make it even with outside of truck frame rail and will use plate and bolts. The extra C channel spacer will also be how it rests on the truck frame with 3" tube spacer. I'll probably us thick rubber mats or wood for supports in the middle where the pallet of salt will be.
  10. subydude

    subydude Junior Member
    from RI
    Messages: 19

    I mounted my flatbed with some home made "u-bolts"... threaded rod, some 1/4 inch plate on top and bottom, lock washers and nuts. Simple but it works.

    Take advantage of the body being off to undercoat the chassis. Hit the crossmembers and shackle area really well. Also one thing i didnt do with mine was undercoat the bottom of the flat bed. I bought mine brand new and didnt think it was necessary but the more i think about it i should have. Its not super thick and plenty of hiding spots for debris and water
  11. wahlturfcare

    wahlturfcare Senior Member
    Messages: 323

    flyboy, i have 2 '93 c/c trucks with flatbed dumps and can send you pics of where all my plates and such are at if you need to help on mounting your bed.
  12. tjctransport

    tjctransport PlowSite.com Addict
    Messages: 1,390

    crew cab frames are 3 inches narrower than pickup frames. so that will do him no good.