PLAIN AND CIVIL: EXAMPLE 7.0.10. FINDING REACTIONS IN TRUSSES

Sunday, 10 March 2019

Determine the reactions of the truss with 450-lb horizontal load applied.

Identify how many unknown reactions each of the supports carry.

The roller at point A will have one reactions perpendicular to the surface. At point C, the hinge will have two reaction components, one parallel and another perpendicular to the surface.

$\sum F_{X}=0]\rightarrow$

${\color{Red} \mathbf{Rx_{C}=450lb}}$ going to the left

$\sum M_{A}=0]$

$Ry_{C}\left ( 8ft \right )=-450lb\left ( 4ft \right )$

${\color{Red} \mathbf{Ry_{C}=225lb}}$ downwards

$\sum M_{C}=0]$

$R_{A}\left ( 8ft \right )=450lb\left ( 4ft \right )$

${\color{Red} \mathbf{R_{A}=225lb}}$ upwards

RELATED TOPIC:

7.0 EQUILIBRIUM OF FORCE SYSTEMS

PLAIN AND CIVIL

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Sunday, 10 March 2019

EXAMPLE 7.0.10. FINDING REACTIONS IN TRUSSES

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