So most likly stringers should be no more than 16 inches apart for wood decking and 12 inches for composite, but should this rule also be applied even to any open riser stairway? Example - 36" wide wood basement set stairs with open risers, should it also have additional stringers, or is this just a concern cause of exterior conditions?
I’m assuming, a deck stairway with risers, does not require the extra stringers because of the riser support?
