• Review Points
• Pavillion I
• Topics

A look at Pavillion I

• How do you feel about a live load of 30 psf?
• Is the load calculation correct?

Another look at Pavillion I

• Does the framing actually run in that direction?
• Are the members actually stacked as shown?
• What is an alternative?

Yet another look at Pavillion I

• Flush framing is more likely
  • Structural layer seems fairly thin.
• Is this organization consistent with other visible evidence?

Beams and Bending

KM

Recall

Fundamental Ideas

• All beams involve bending: tension and compression stresses working on opposite edges of the beam to form a couple.

• This action deforms each small rectangular slice of a beam into a wedge shape that is narrower on the compression side and wider on the tension side.

• By studying this deformation and relating it to mechanics of materials, we can establish a relationship between the internal moment, the stress in the beam, and the cross section properties.

• This relationship is critical to understanding the proper form and proportioning of beams.