1. DRILL: list 2 examples of what live loads are in the house below

2. STRUCTURAL ENGINEERING: forces and structures
APPLICATIONS OF TECHNOLOGY

3. WHAT IS A STRUCTURAL ENGINEER?
A Structural Engineer analyzes and designs the gravity support and lateral force resistance of buildings, bridges, and other structures.
Create drawings and specifications
Perform calculations
Review work of other engineers
Write reports and evaluations
Observe construction sites

4. Using vocabulary from chapter 21 tell me What happened???

5. A load is any force that impacts a structural member.
WHAT IS A LOAD?
A load is any force that impacts a structural member.
Live Loads
Earthquakes
Wind
People
Furnishings and Equipment
Snow & Rain
Dead Loads
Weight of Structure
Weight of permanent building fixtures

6. WHAT IS A LOAD? Settlement Load Ground pressure Water pressure
A load is any force that impacts a structural member.
Settlement Load
Ground pressure
Water pressure
Impact Loads
Moving Vehicles
Equipment
Machinery
Will all of these loads be applied to a building at once?
No. Structural Engineers may be more concerned about earthquake loads in California than in Maryland. Structural Engineers in Maryland must account for snow loads instead.

7. FORCES
A force is any action that maintains or changes the shape or position of a structural member.
Compression
Tension
Gravity

8. FORCES
A force is any action that maintains or changes the shape or position of a structural member.
Torsion
Moment (Torque)
Shear
The forces acting on a structural member must be balanced and the members must be able to support all loads applied to them. Unbalanced members may fail and cause injury if these factors are not taken into consideration.
M=fd
Moment = Force x Distance(Perpendicular)

9. STRUCTURAL ELEMENTS/MEMBERS
A structural element/member is a piece of the building that does work in holding up the structure.
Columns and Beams
Span: Distance between two structural members
Cantilevers

10. STRUCTURAL ELEMENTS/MEMBERS
Trusses

11. STRUCTURAL ELEMENTS/MEMBERS
Arch
Dome
Vault

12. Exit ticket Write down each Question and answer in complete sentences
What forces are at work in a typical residential building?
What structural members are used in typical wall and floor construction?
How, why, and where are these structural members used in a building?

13. NEWTONS LAWS OF MOTION
#1- An object at rest, stays at rest unless acted on by an outside force. An object in motion, stays in motion unless acted on by an outside force.
#2- The sum of the forces on an object is equal to that object’s mass multiplied by its acceleration.
#3- Every action has an equal and opposite reaction.