Has anyone installed an interior assist handle for going up the stairs to the bedroom area of a 5th wheel? How can I tell if there is any support material in the wall? Thanks for any suggestions!!
For something that you might have to put the weight of your body into I would install two pieces of oak or similar hardwood on both sides of the wall, mount your hand rail from behind in the hallway side, and put multiple bolts with washers right through the wall and through the plate on the other side. Buy some bolt caps to put over the bolt ends or countersink them into the oak and put wooden plugs over the bolts for decoration purposes.