Structual Repair with metal components
This is more a theoretical question as I have not seen posts pertaining to using steel 2x4s to replace rotten wooden ones. My camper has some significant repairs and I thought about trying to incorpo...
Forum Discussion
Interesting question, I agree wood as you indicate is probably best in your case. Structurally, what the framing member is doing stress-wise is important. Section modulus and moment of inertia properties vary widely between wood and aluminum box or C-channels, and for a camper application I expect a lot of off-axis loads - not to mention transient and sub-transient dynamic shock loads - which defy a static analysis performed when sitting level while parked.
Retro-fit framing repairs introduce possibility of inadequate load transfer capacity as compared to original framing design (whether documented or not) (and potential liability issues)
I've previously asked/looked for actual stress analysis/design figures used for framing design from manufacturers; naturally most are hesitant to provide this.
I've seen and repaired buckled square Al tubing on campers before, when failure is tracable to a known cause (ie, accident) that is preferable to failures with no obvious reason.
Retro-fit framing repairs introduce possibility of inadequate load transfer capacity as compared to original framing design (whether documented or not) (and potential liability issues)
I've previously asked/looked for actual stress analysis/design figures used for framing design from manufacturers; naturally most are hesitant to provide this.
I've seen and repaired buckled square Al tubing on campers before, when failure is tracable to a known cause (ie, accident) that is preferable to failures with no obvious reason.
