For the best answers, search on this site https://shorturl.im/aQnO1. The standard atmosphere (symbol: atm) is an international reference pressure defined as 101325 Pa and formerly used as a unit of pressure.
stringer - a member of a squad on a team; a first stringer; a second stringer. team, squad - a cooperative unit (especially in sports) player, participant - a person who participates in or is skilled at some game.
Mark a line from bottom to top. With 1 person on the floor, and another on a ladder, use a pencil with a straight edge or chalk line to mark a diagonal line for the stringer. The stringer is the part of the stairs that the steps, or threads, and risers will be attached.