Frame Reinforcement for Hitch Receiver/Rear Bumper

Discussion in 'Fabrication' started by Apex, Mar 21, 2019.

  1. Apex

    Apex Full Access Member

    Messages:
    68
    Likes Received:
    4
    Joined:
    Feb 28, 2008
    Location:
    Virginia
    I broke my hitch bolts taking them off this past weekend, stealership cross-threaded 2 of 4. I put my thinking cap on and came up with this:

    [​IMG]

    [​IMG]

    [​IMG]

    I started by welding some 4x4x.25” angle iron onto each side of the hitch receiver, then knocking the factory hitch nuts out and retrieving them with a magnet from inside the frame rails. Next I drilled the holes all the way up through the floorboard, and fabricated the crush plates using 3/16” thick steel. I used self tapping screws to cinch the crush plates to the upper side of the frame rails. Four 5/8x6” bolts are in place of the puny factory ones, and I plan on adding a few more horizontally into the bumper frame with DOM crush sleeves.
     
  2. tommudd

    tommudd Moderator Staff Member Moderator

    Messages:
    16,991
    Likes Received:
    108
    Joined:
    Jul 14, 2005
    Location:
    Southeastern Ohio
    What grade bolts are they
    also self tappers look small ?
     
  3. Apex

    Apex Full Access Member

    Messages:
    68
    Likes Received:
    4
    Joined:
    Feb 28, 2008
    Location:
    Virginia
    Grade 5 for now, have 8s on order. Those self tappers are the ones we use to build the big metal buildings and such, but I did use plenty on each side.
     
  4. tommudd

    tommudd Moderator Staff Member Moderator

    Messages:
    16,991
    Likes Received:
    108
    Joined:
    Jul 14, 2005
    Location:
    Southeastern Ohio
    Great to see you are going to use Grade 8s, also plenty of LocTite
     
  5. LibertyTC

    LibertyTC Well-Known Member Staff Member Moderator

    Messages:
    6,123
    Likes Received:
    69
    Joined:
    Oct 24, 2008
    Location:
    B.C. Canada
    When it comes to hitch load and pulling a trailer, safety makes sense.
    When you decide to fabricate or make changes to the structure, it may not be as strong as expected.
    I would recommend having this modification inspected by a commercial hitch shop.
     
    Last edited: Mar 23, 2019
  6. Apex

    Apex Full Access Member

    Messages:
    68
    Likes Received:
    4
    Joined:
    Feb 28, 2008
    Location:
    Virginia
    Safety always makes sense, and that’s a good idea TC. I’ll get it checked over.