Not the Way to Mount Running Boards to your Truck!

Running Boards are very popular and offer to convenient way to enter and leave a truck for those who have a hard time getting in and out.  Running boards come in various styles and are usually equipped with brackets that are intended to be bolted to the truck underbody.  However, when the underbody is corroded or the condition of the metal that will hold the running board is questionable, then caution should be exercised in deciding whether and how to mount the boards.  When bolts can’t be used, welding the bracket to the underbody can be an alternative.  In doing so, care must be taken not to set the vehicle on fire!  Carpeting is usually present at the edge of the floorboard adjacent to the doors.  When welding the brackets, the heat from the weld is conducted through the metal to the carpet (and wiring if present) creating a perfect condition for a vehicle fire.  The photographs shown below illustrate how a fire originated in a 1997 Ford F 250 when one of the passenger side running board brackets was welded to the underbody.  Precautions must be taken before welding to prevent damage to the vehicle.  If bolts cannot be used because of questionable metal strength, then welding is probably not a good idea either.    

Fire origin at floorboard and damage to passenger door
View of underbody beneath area of fire origin, note bracket weld location

About R.J. Hill, P.E.
R. J. Hill is the author of two blogs: R.J. Hill Consulting and the Descendants of James Alexander Hill. Mr. Hill is a registered professional (mechanical) engineer with 42 years of experience, 37 years in private practice. Please visit www.rjhill.com to see the kinds of forensic investigations that Mr. Hill performs.

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