Hip inncung i a tliknak system tuaktannak
A herhmi tahfung kha langhter millimeter in
Y - inncung sannak
X - inn sau
Z - inn kauhnak
C - a niam bik innleng a ngan ning
U - Rafter kauhnak
W - Rafter a thuhnak
S - Rafter pitch
O1 - Hnawmhnak thingphel kauhnak
O2 - Khuhnak board a thuhnak
R - Lathing step
Program thilti khawhnak.
Truss dirhmun tuaktannak.
Rafters caah a herhmi inn saknak thilri zat tuaktannak.
Hnawmhnak thingphel hna i an zat tuaktannak.
Rafter system chung i a ummi thil vialte hna i a dikthliar in a tahnak.
A cunglei inncung, tliknak, tliknak hna i a tawinak in suaimi.