Stringers are the diagonally placed boards anchored at the top the header and the bottom the footer of the staircase.
Stair tread return length.
Single return treads are measured by the overall length.
Simply choose a length of return that matches the thickness and type of wood as the tread rout shape as desired cut to length and attach to the tread using a biscuit and glue join or a finish nailer.
A 42 left return tread is 42 long overall and has a 40 3 4 throat 42 tread 1 1 4 return return this is a 1 1 4 solid stave that is bullnosed on one side and glued to fit along the open end of the stair tread.
Double return stair treads have a mitered return on both the left and right ends.
Because the mitered returns are both 1 wide the overall width of a double return stair tread will always be 2.
Returns can also be added to existing treads as molding.
The stringer is the backbone of the structure.
There are three main components in a standard staircase.