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344 Structural Analysis and Machines Chapter 6

Problems 6.19 and 6.20 

The structure consists of seven pin-connected members. Determine the force

supported  by all members. Express your answers in terms of parameters such as F

and L.

Figure P6.19 Figure P6.20  

Problems 6.21 and 6.22 

The structure consists of pin-connected members. Determine the force supported by

all 

members.

Figure P6.21 Figure P6.22  

FigureP6.23

Problem 6.23 

A Bollman truss is shown. Determine the force supported by each of the five bars and

four cables.

Problem 6.24 

(a !y inspection" identify the #ero-force members in the truss.

(b Determine the force supported by all members of the truss.

Figure P6.24

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Section 6.1 Truss Structures and the Method of Joints   345

Problem 6.25 

(a !y inspection" identify the #ero-force members in the truss.

(b Determine the force supported by member F$ and all of the members to the

left of it.

(c Determine the force supported by all of the members to the ri%ht of member F$.

Problem 6.26 

(a !y inspection" identify the #ero-force members in the truss.

(b Determine the force supported by member &' and all of the members to the

left of it.

(c Determine the force supported by all of the members to the ri%ht of member

&' .

Figure P6.25 

Problem 6.27 

The truss has frictionless pulleys at points !" ( " and ). &able se%ment !L is

vertical and * D + ,ip.

(a !y inspection" identify the #ero-force members in the truss.

(b Determine the force supported by member &E.

(c Determine the force supported by member $ .Figure P6.26 

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Figure P6.27