Reiht truss cowrey trianglagh
Cur fys ayns millimeteryn
X - Fad y truss
Y - Ard y truss
Z - Thie beam
W - Leed beam
S - earroo ny postyn verticale
P - Struts
N - soilshaghey nummeryn part
Ta truss roof cowrey jeant seose jeh eilynnyn ta jannoo strughtooryn trianglagh stiagh.
Ta'n ard-chree t'er ny mharkey son truss cowrey 20 percent jeh'n fad span.
Ta'n program ymmyrkey yn earroo dy studeyryn, soilshaghey tarraaghyn y truss as y dimensionyn ry-hoi jeh ny parts.