We are about to build a number of sets of walnut stairs. Stringers are 2 1/2" veneered plywood core. Treads are 2". There are no risers. What is the best method for setting the treads in pockets? We do not want to use exposed fasteners anywhere.
(Architectural Woodworking Forum)
From contributor D:
Blind dado the treads in and use a PL Premium Urethane adhesive. Clamp it all together. However - if there is any flex in the tread, you may be asking for stress fractures at the joint later on. Better get them engineered or tested.
Your question really cannot be answered without knowing all the particulars of the construction. You've mentioned the stringer plan but not the tread construction. Is the 2" thickness net or nominal? (Is that thick enough?) Is it solid or composite? How wide is the tread span?
Keep in mind that whatever carpenters (such as you or me) may suggest or decide, this isn't a decision that we should have to make. This is the architect's responsibility (and liability)? Do you happen to have a structural engineering license?
As far as I'm concerned, open stairs are the most difficult to engineer.