Lesson 18

To solve for the RED member which method would you use?

• Method of Joints

• Method of Sections

TYPICALLY, your first step in a truss problem should be . . .

• Draw a joint FBD.

• Sum the forces in the x direction.

• Sum the forces in the y direction.

• Draw a FBD of the overall system.

Which is NOT an assumption of a truss:

• All members are 2-Force members

• All joints are smooth pins

• All external forces are applied at the joints

• Must be supported by 2 rollers

Which equations do you use to solve for unknown members in the method of joints?

In the method of sections our cut FBD can be solved for _____ unknown members.

• 1

• 2

• 3

• 4