Rafter ni hisab.

Rafter ni kotorma tei angle ni lekhamung

Khapang srangwi nangmani kotor kotor phunukdi milimitar o

X - nokni kotorma
Y - nokni chuknohani kuchuk
C - kotorma
Z - Board ni uklogoni simi chopmani swkangni simi jora
B - Rafter ni kotorma

sinimung rwi samung khlairwmani

Rafters kwrwi khe nokni chuknoha swnamwi man glak.
Gable chuknohani swnamjakma bai, abo rafters ni kotor kotor, angle tei grooves no lekhana nangnai.
Rafter ni rang rwmani program omoni bagwi se swnamjak.
Nokni rangchakno twiwi, swkangni simi nokni chuknohani rangchak jora tei overhangni rangchak, raftersni rangchak tei groove jora jora wngnai.
Program o rangchak ni rangchak bai rangchak ni rangchak nobo swnam nai. O kok belai kheno wngnai, sakni yak bai rafters swnamna bagwi uansuknairokni bagwi.