I am looking at building a deck using composite treads (Veranda/Timbertech/Yakima). I imagine it has to be designed a bit differently but I can't find anything on the subject. For example:
1. Do I really need to space stringers every 12-16"?
2. If I use wooden risers does that eliminate the problem?
3. If I use multiple center stringers, do I really need a frost footing for each one (my area requires footings on stairs) or can I use a board across the bottom to distribute the load to the two footings on the outside posts?