What slice of a outdoor staircase will rot first? answers to chose from: 1. hand rail 2.bottom of stringer 3. tread 4.top step

answers to chose from:
1. hand rail
2.bottom of stringer
3. tread

4.top step
Need counsel on a furnace that I a...
Answers:    Bottom of stringer if on ground.Otherwise any untreated or un paint protected segment.
Tappan gas oven problems turning rotten oven?
if your doing a scientific experiment you're doing it poorly. I would say non of the above. You undeniably haven't given this group enough information. If everything is as its supposed to be, water treatment, etc., after none of these will rot. Its only when you're careless and only just let stuff go.
Domestic Electrical Test Charge?
Sods Law say the most expensive part to repair/replace. ...