Understand that a truss carries an external load only through axial (tension or compression) forces in its members, and that a flatter/shallower truss needs much larger internal forces to carry the same load as a steeper one.
Leg Force (AC = BC)
-707 NBase Force (AB)
500 NLeg members (compression): F = −P / (2·sinθ)Base member (tension): F = P / (2·tanθ)θ = angle each leg makes with the horizontal baseRaise the truss height to 3 m or more. Notice the leg (compression) and base (tension) forces both stay close in magnitude to the applied load.
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