I have a need to mount three newel posts to a 3/4" subfloor. I don’t have access from below (finished basement).
The current newel posts were mounted using a flange plate that was bolted to the bottom of the newel, then bolted to the subfloor. This works fine with carpet, but I will be putting hardwood down.
What’s the best way to anchor the newels in this situation? Home Despot has L-brackets, but it just doesn’t seem to me that they would be all that strong. The newel post is a box newel that is 5"x5" at the bottom, so fairly substantial.
Do they have a bolt system that has heavy-duty fingers that pop-out after you put it through the subfloor that can grasp and hold a bolt in, that could be used to screw a nut down on the bolt from within the newel post?
Or should I do a plate like they did before and let the hardwood floor installers work with it?