鋼桁架一般(但並非一定)會包括直桿結構件,彼此以接點相連 ,這些接點也稱為panel points。鋼桁架一般(但並非一定)會由三角形組成,因為三角形有其結構上的穩定性。三角形是最簡單只要各邊長度確定,其形狀就不會改變的幾何圖形。相較起來,四邊形的各邊及各角都要確定才會確定其形狀。桁架中設計用來支撐的接點一般會稱為munter point。

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