1. Agricultural Hall and Annex Easting Lansing, MI
Ismail Al-Hadhrami
AE – Structural Option

2. Presentation Outline (1) Existing Building Background
(2) Structural Systems
- Gravity System
- Lateral System
(3) Proposed Thesis
(4) Structural Design
(5) Construction Management
(6) Conclusion
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

3. Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option
Project Team
(1) Owner
- Michigan State University
(2) Architect
- SmithGroup
(3) Structural Engineer
(6) Project Manager
(5) MEP Engineer
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

4. Building Location Michigan State University Campus Existing Building
Agricultural Hall and Annex
North Kedzie Hall
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

5. Building Information Designed to be five-story with penthouse
Three floors have been built
1000 SQ FT/Floor
Use – office building
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

6. Structural Systems Gravity System - Cast-in-place one-way Columns
joist
- 30” and 20” clear spans
- Joist depth = 16” deep
+ 4.5” slab
- Girders depth = 27.5”
Columns
- 24” x 24”
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

7. Structural System Lateral System - Seismic Loads govern
- Concrete Moment Frames
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

8. Proposal Building Design Codes Comparison
US Standards vs. British Standards
Focus
- Gravity Loads
- Loads Combinations
- Wind Design Procedures
Gravity Systems (US Standards)
- Wide-Module One-way Joist System
- Flat Slab
- Composite Steel with Composite Deck
- East Lansing, MI
Gravity Systems (British Systems)
- Two-way Slab with Interior Beams
- Muscat, Oman
Lateral System
- Concrete moment frames for concrete structures
- Moment frames and braced frames for steel structure
Cost and Time Comparison
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

9. Design Codes US - ACI 318-02 - IBC 2003 -ASCE 7-02 British -BS 8110
-Reinforced Concrete Building
Examples based on BS 8110
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

10. US Codes vs. British Codes
Gravity Loads
Office Building
US Standards
British Standards
Live Loads
50 psf
52.5 psf
Partitions
20 psf
20.5 psf
Corridors
80 psf
83.5 psf
Miscellaneous
15 psf
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

11. US Codes vs. British Codes (cont.)
Loads Combinations
US Standards ACI
British Standards
1- U = 1.4(D+F)
2- U = 1.2(D+F+T) (L+H) (Lr or S or R)
3- U = 1.2D + 1.6(Lr or S or R) + (1.0l or 0.8W)
4- U = 1.2D + 1.6W + 1.0L +0.5(Lr or S or R)
5- U = 1.2D + 1.0E+ 1.0L + 0.2S
6- U = 0.9D +1 .6W + 1.6H
7- U = 0.9D E H
1- U = 1.4 DL+ 1.6 LL En
2- U = 1.4 ( DL + W + En)
3- U = 1.2 ( DL + LL + W + En)
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

12. US Codes vs. British Codes (cont.)
Wind Design Procedure
US Codes Method 2 – ASCE 7-02
1- The basic wind speed V and wind directionality factor Kd
2- An importance factor I
3- An exposure category and velocity pressure exposure coefficient Kz
4- A topographic factor Kzt
5- A gust effect factor G
6- An enclosure classification
7- Internal pressure coefficient GCpi
8- External pressure coefficients Cp
9- Velocity pressure qz or qh
10- Designed wind load p
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

13. US Codes vs. British Codes (cont.)
Wind Design Procedure (cont.)
BS 8110
1- Determine the basic wind speed
2- Read off appropriate value of factor S2 (kz)
3- Multiply V by S2 to obtain characteristic wind speed Vs.
4- Read off characteristic wind pressure wk corresponding to Vs
5- Determine force coefficient Cf
6- F = wk A Cf
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

14. Design of Gravity Systems
Wide Module One-way Skip Joist -US
CRSI 2002
Design Criteria
- Girders depth = joists depth
- T-Beams requirements apply
- Minimum cover = 1 ½ in
- Design shear strength = 2 Φ √f’c bw d
- Minimum shear reinforcement =50 (bws)/ fy
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

15. Design of Gravity Systems (cont.)
Wide Module One-way Skip Joist US (cont.)
Design Result
- 66” Forms + 6” 72 c-c
- depth = 24.5 in (20” Deep Rib + 4.5” Top Slab)
- Concrete quantity = 83 psf
For the End Span
Tabulated Capacity
1002 plf
Top Bars
# 4 at 10 in
Bottom Bars
2 # 7
Stirrups
Single leg stirrups, # 3 spaced at 11 in for 123 in
For the Interior Span
Tabulated Capacity
1774 plf
Top Bars
# 5 at 11 in
Bottom Bars
2 # 7
Stirrups
Single leg stirrups, # 3 spaced at 11 in for 125 in
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

16. Design of Gravity Systems (cont.)
Wide Module One-way Skip Joist US (cont.)
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

17. Design of Gravity Systems (cont.)
Design Criteria
Equivalent Frame Method
ADOSS Software
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

18. Design of Gravity Systems (cont.)
Flat Slab with Drop Panels –US
Design Results
Item
Value
Comment
Slab thickness
12.5”
> Minimum
Drop panel thickness
3.5
> ¼ slab thick.
Maximum deflection
0.235”
<< Allowable
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

19. Design of Gravity Systems (cont.)
Flat Slab with Drop Panels –British Stand.
Design Results
Item
Value
Comment
Slab thickness
13”
Drop panel thickness
3.5
> ¼ slab thick.
Maximum deflection
0.235”
<< Allowable
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

20. Design of Gravity Systems (cont.)
Two-way Slab with Beams – British Stand.
Design Results
Item
Value
Comment
Slab thickness
10.5”
Maximum deflection
0.236 in
<< Allowable
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

21. Lateral System Seismic controls Concrete Moment Frames SAP 2000
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

22. Lateral System (cont.) Frame Design Considerations:
1 – Same Size Columns
2- Constant dimensions
3- 4% Concrete/Steel reinforcement ratio
4- Drift was set to not to exceed L/400
8- 5% percent of building width was included to account for torsional
effect
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

23. Lateral System (cont.)
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

24. Lateral System (cont.)
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

25. Lateral System (cont.) Design Result One-way Skip Joist
Flat Slab US Codes
Flat Slab British Codes
Two-way with beams
Column Sizes
18” x 18”
24” x 24”
Varies
20” x 20”
22” x 22”
14 x 14
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

26. Steel Structure Lateral System
Framing System
- Composite steel with composite metal Deck
- Beams are spaced 5’ O.C.
Lateral System
- Braced Frames around stairwells (Chevron, )
- Braced Frames around Elevator shaft (X)
- Moment Frames around the perimeter
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

27. Steel Structure (cont.)
Typical Floor Plan
Added columns
Braced frames
Braced Frames
Moment Frames
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

28. Steel Structure (cont.)
Braced and Moment Frames
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

29. Steel Structure (cont.)
Design Results
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

30. Steel Structure (cont.)
Design Results (cont)
W14 x 82
W 14 x 43
W 8 x 10
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

31. Steel Structure (cont.)
Stress Design Check (Interaction Eq.)
0.8 – 0.89
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

32. Construction Management
RSMeans 2005
ICE 2000
MC2
Modification Factor =0.96
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

33. Construction Management (cont.)
System Comparison ( Concrete Structures)
System
Cost
Time
Preferred System
One-way Wide Module Joist (Skip Joist System)
573,600
5.3 days/ floor
XXXX
Flat Slab with Drop Panels (US Standards)
742,400
6.13 days/ floor
Flat Slab with Drop Panels (British Standards)
760,900
7.32 days/ floor
Two-way Slab with Beams (British Standards)
568,800
6.37 days/ floor
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

34. Construction Management (cont.)
System Comparison ( Concrete vs. Steel)
System
$ Cost
Preferred System
One-way Wide Module Joist
573,600
Composite Steel with Composite Metal Deck
278,200
XXXXXX
Agricultural Hall and Annex Ismail Al-Hadhrami-Structural Option

35. Conclusion US Standards - Concrete vs. Concrete
-Wide Module One-way Joist
- Concrete vs. Steel
- Composite Steel with Composite Metal Deck

36. Conclusion (cont.) British Standards - Concrete vs. Concrete
-Two-way with interior Beams

37. Acknowledgment Professor K. Parfitt – Special Thanks Dr. Ali Memari
Dr. L. Hanagan
Dr. T. Boothby
Mr. Masoud Al-Hashimi
Mr. Ammar Mohammed
Gary Strand
John McCarthy
Selim Ercan
Pat Hopple
Darren Howard
Joe Chan
John Hill

38. Questions?