Kubalila nzila yakubamba ŋanda
Twalomba kuti utondezye bupati buyandika mumamilimita
Y - bulamfu bwaciluli
X - bulamfu bwaŋanda
Z - bupati bwaŋanda
C - bupati busyoonto bwaziluli zyaatala
U - Bulamfu bwa Rafter
W - Kuyuma kwachisamu
S - Rafter pitch
O1 - Bulamfu bwamabbodela aakuvwumbilila
O2 - Bulemu bwabbodela lyakuvwumbilila
R - Ntaamu yakubamba
Ikukonzya kwapulogilamu.
Kubalila kwabupange bwama truss.
Kuziba mweelwe wazibelesyo zyakuyasya ziyandikana.
Kuziba bupati bwamabboodi aakuvwumbilila.
Bupati bwini bwazibeela zyoonse zya rafter system.
Zifwanikiso zilembedwe kabotu-kabotu zyaciluli camucibuno, zikobela, zivwunisyo.