Ukubalwa kwehlelo le-rafter lophahla lwe-hip
Sibawa utjengise ubukhulu obutlhogekako ngamamilimitha
Y - ukuphakama kophahla
X - ubude bendlu
Z - ububanzi bendlu
C - ubukhulu obuncani be-eave overhang
U - Ububanzi be-rafter
W - Ubukhulu be-rafter
S - Iphitjhi ye-Rafter
O1 - Ububanzi bamabhodi wokuvala
O2 - Ukuqina kwebhodi lokuvala
R - Igadango lokubopha
Amakghono wehlelo.
Ukubalwa kwesakhiwo se-truss.
Ukuthola inani elitlhogekako lezinto zokwakha zama-rafters.
Ukuthola ivolumu yamabhodi wokuvala.
Ubukhulu obuqondileko bazo zoke iingcenye zehlelo le-rafter.
Imidwebo enemininingwane yophahla lwe-hip, ama-rafters, ukuvala.