Ukubalwa kwama-rafters.

Ukubalwa kwamasayizi we-rafter nama-engeli

Sibawa utjengise ubukhulu obutlhogekako ngamamilimitha

X - ububanzi bendlu
Y - ukuphakama kophahla
C - ubukhulu obuphakemeko
Z - ibanga ukusuka emphethweni webhodi ukuya ekuthomeni kokusika
B - Ububanzi be-rafter

ireferensi

Ngaphandle kwama-rafters, uphahla alukwazi ukwakhiwa.
Ngesakhiwo sophahla lwe-gable, kuyatlhogeka ukubala ubukhulu bama-rafters, ukusika ama-engeli nama-groove.
Ihlelo lokubala i-rafter lenzelwe lokhu.
Ngokuya ngobubanzi bendlu, ukuphakama ukusuka ekuthomeni ukuya ephepheni lophahla kanye nobubanzi be-overhang, ubude bama-rafters kanye nebanga lokuya emgodini kuyabalwa.
Ihlelo lizokubuye lidwebe umdwebo wama-rafters anemilinganiso. Lokhu kuzokuba lisizo khulu kilabo abakhetha ukwenza ama-rafters ngezandla zabo.