Method of Joints

Which of the following assumptions are made when considering a truss system? (Choose 3)

• Each member has weight

• No loads are applied at the joints

• All members are perfectly straight

• All joints are pinned & frictionless

• Members can only experience tension or compression forces

A pinned support, seen on the left side in this truss bridge, has how many reactions?

• 1

• 2

• 3

• None

A roller support moves with forces applied to the truss bridge. How many reactions does roller support have?

• 1

• 2

• 3

• None

How many members are seen in the truss bridge pictured here?

• 2

• 3

• 4

• 5

How many joints are seen in the truss bridge pictured here?

• 2

• 3

• 4

• 5

How many members are seen in the this truss bridge?

• 8

• 7

• 6

• 5

How many joints are seen in this bridge?

• 1

• 2

• 3

• 5

This bridge contains one pinned support and one roller support. How many reactions does this bridge have?

• 1

• 2

• 3

• 4

What are the three Equations of Static Equilibrium?

• ∑Fx=0

• ∑Fy=0

• ∑M=0

• ∑V=0

By convention, a moment that would cause a clockwise rotation is which of the following?

• negative moment

• positive moment