1. KNOWLEDGE BASE REQUIRED:
CONTINUOUS .VS. SIMPLE_SUPPORT
KNOWLEDGE BASE REQUIRED:
STRENGTH OF MATERIALS
STEEL DESIGN
TIMBER DESIGN
SOIL MECHANICS
WE COVERED:
AREA AND CENTER OF GRAVITY
Itotxx = Ixx + Ay2
SECTION MODULUS
RADIUS OF GYRATION
SOLVED ONE PROBLEM

2. MECHANICS OF
MATERIAL BEHAVIOR:
WE REVIEWED STATICS:
DEFLECTION COMPUTATIONS
SOLVED DEFLECTION PROBLEM
DUE TO LOAD
DUE TO THERMAL EXPANSION
WE REVIEWED FLEXURE:

3. REVIEW OF STATICS (CONT’D)
MOMENT -SHEAR DIAGRAMS
SAMPLE PROBLEM

4. SOLUTION

5. SIMPLE SUPPORT
CANTILEVER

6. OVERHANGING
CONTINUOUS

7. IN FORMING AND BRACING DESIGN MANY OF THE MEMBERS HAVE MULTIPLE SUPPORTS.
WHAT IS THE DIFFERENCE
BETWEEN A CONTINOUS MEMBER
AND A SIMPLE SPAN??
ASSUME A SPAN OF 10 FT. AT 1K/FT:

8. SIMPLE SPAN SOLUTION

9. CONTINUOUS BEAMS - THREE SPANS

10. CONTINUOUS SPAN SOLUTION

11. CONCLUSION:
NOTE:
CONTINUOUS SPAN SOLUTION HAS
10% MORE LOAD ON THE INTERIOR
SUPPORTS AND 20% LESS ON THE EXTERIOR WHEREAS THE CONTINOUS IS ALLTHE SAME
SHEAR IS GREATER IN THE CONTINUOUS SPAN SOLUTION
6K > 5K
MAX MOMENT IS GREATER IN THE SIMPLE SPAN SOLUTION
12.5K-FT > 10K-FT

12. CONCLUSION CONTINUED:
WOOD MEMBERS WOULD HAVE TO BE THE LENGTH OF THE FULL MEMBER
BECAUSE IT IS DIFFICULT TO SPLICE
EFFECTIVELY TO ACHIEVE CONTINUITY!!
STEEL MEMBERS WOULD HAVE TO BE THE LENGTH OF THE FULL MEMBER
BECAUSE YOU CAN SPLICE BUT WELDS AND BOLTS ARE NOT SUFFICIENT ENOUGH!!