Nneɛma dodow a wɔde bɛyɛ abɔnten afasu ho akontaabu

Ɔfasu ho akontaabu

Kyerɛw nsusuwii ahorow wɔ sɛntimita mu

X - Gable ɔfasu no trɛw
Z - Afã ɔfasu tenten
Y - Ɔsorokɔ wɔ pediment no ridge no so
H - Twea so ɔfasu no sorokɔ
F - Side ɔfasu ridge sorokɔ
T - Ɔfasu no mu duru

Dwumadie no bɛboa ama wɔabu adansi nneɛma dodoɔ a wɔde bɛyɛ birikisi, block, nnua anaa frame dan bi akyi afasuo.
Kyerɛ ɔsorokɔ a ɛwɔ gable no ridge no mu a ɛne ɔfasu no sorokɔ yɛ pɛ sɛ worebu abansoro biako afasu ho akontaa a.