Shenandoah defeated host Caldwell at both the varsity and junior varsity level when the two Noble County schools faced off Thursday at Caldwell. In junior varsity action, Caldwell fell 2-25 in the first set, and 21-25 in the second set, bringing their record to 0-2. Caldwellâs Abby DeLancey was the leader in assist and digs, with six and 11, respectively. Parker Stephens and Cayton Secrest led in kills with three apiece.
SDR, DR, Schedule or wall thickness The standard dimension ratio (SDR), dimensional ratio (DR), schedule or wall thickness. The SDR or DR is the pipe OD divided by pipe wall. The schedule number of the pipe is an alternate identifier.
Under the SDR standard the actual thickness of the pipe wall is determined by dividing the pipe diameter by the index number thus a 4 SDR-20 pipe would have a wall thickness of 4/20= 0.2. SDR pipe may not be used for DWV (Drain, waste & vent) applications but it is approved for storm drainage.