Nnua a wɔde ayɛ ahinanan ho akontaabu
Kyerɛw nsusuwii ahorow wɔ milimita mu
X - Truss no tenten
Y - Truss a Ɛkɔ soro
Z - Beam no mu duru
W - Beam no trɛw
S - dodow a wɔde gyina hɔ
P - Podkosy na ɔkyerɛwee
N - kyerɛ ɔfã no nɔma ahorow
Nnua truss truss yɛ nneɛma a ɛyɛ ahinanan a ɛyɛ den.
Anyɛ yiye koraa no, sɛnea wɔkamfo kyerɛ sɛ nnua a wɔde yɛ adum no tenten yɛ span no tenten ɔha biara mu nkyem 20.
Dwumadie no bɛbu nneɛma dodoɔ a wɔhwehwɛ, akyerɛ afuo no ho mfonini ne afã ahodoɔ no nsusuiɛ a wɔhwehwɛ.