After the chamber reached treatment temperature, it took about 100 minutes to reach 56[degrees]C at the center stringer
in the stack.
Herbst wanted to make his improvements within the framework of the fence's classic design, which alternates vertical boards on opposite sides of a center stringer
so there is no "bad" side.
From the point of view of tributary area of loading, the center stringer
in a three-stringer stair system would be expected to carry up to 50 percent of the loading while the two side stringers would carry 25 percent of the load each.