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Drilling Precautions

WARNING: This page is about a different car, the 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. Holes that would weaken the frame sidemember should not be drilled in the frame.
  2. Holes are not to be drilled in the sidemember's top or bottom flange.
  3. Holes to mount brackets, out-riggers and supports may be drilled in the vertical frame side rail web with the following restrictions:
    • Material between edge of hole and inside of upper or lower flange must not be less than 1.50 inch for low carbon steel (36,000 psi yield).
    • The minimum edge distance between any 2 holes up to 5/8 inch diameter must be 1.00 inch. For larger than 5/8 inch diameter holes, the minimum edge distance must be 1.5 times the diameter of the largest hole.
    • No holes will be allowed to exceed 0.75 inch in diameter.
    • Avoid close vertical succession of fasteners.
    • All attaching fasteners, including flat washers, must be of high strength steel (Grade 8).
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