Agricultural Hall and Annex
Easting Lansing, MI
Ismail Al-Hadhrami
AE – Structural Option
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
Project Team
(1) Owner
- Michigan State University
(2) Architect
- SmithGroup
(3) Structural Engineer
- SmithGroup
(6) Project Manager
- SmithGroup
(5) MEP Engineer
- SmithGroup
Agricultural Hall and Annex
Ismail Al-Hadhrami-Structural Option
Building Location

Michigan State University Campus
Existing Building
Agricultural Hall and
Annex
North
Kedzie Hall
www.msu.edu
Agricultural Hall and Annex
Ismail Al-Hadhrami-Structural Option
Building Information
(1)
(2)
(3)
(4)
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
Structural Systems

Gravity System
- Cast-in-place one-way
joist
- 30” and 20” clear spans
- Joist depth = 16” deep
+ 4.5” slab
- Girders depth = 27.5”
+ 4.5” slab

Columns
- 24” x 24”
Agricultural Hall and Annex
Ismail Al-Hadhrami-Structural Option
Structural System

Lateral System
- Seismic Loads govern
- Concrete Moment Frames
Agricultural Hall and Annex
Ismail Al-Hadhrami-Structural Option
Proposal
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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)
- Flat Slab
- 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
Design Codes

US
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- 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
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
15 psf
Agricultural Hall and Annex
Ismail Al-Hadhrami-Structural Option
US Codes vs. British Codes (cont.)

Loads Combinations
US Standards ACI 318- British Standards
02
1- U = 1.4(D+F)
2- U = 1.2(D+F+T) + 1.6 (L+H) + 0.5
(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 + 1.0 E + 1.6 H
Agricultural Hall and Annex
1- U = 1.4 DL+ 1.6 LL + 1.4 En
2- U = 1.4 ( DL + W + En)
3- U = 1.2 ( DL + LL + W + En)
Ismail Al-Hadhrami-Structural Option
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
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
Design of Gravity Systems
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Wide Module One-way Skip Joist -US
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CRSI 2002
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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
Design of Gravity Systems (cont.)
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Wide Module One-way Skip Joist US (cont.)
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Design Result
- 66” Forms + 6” Ribs @ 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
For the Interior Span
Single leg stirrups, # 3 spaced at 11 in for 123 in
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
Design of Gravity Systems (cont.)

Wide Module One-way Skip Joist US (cont.)
Agricultural Hall and Annex
Ismail Al-Hadhrami-Structural Option
Design of Gravity Systems (cont.)
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Design Criteria
Equivalent Frame Method
ADOSS Software
Agricultural Hall and Annex
Ismail Al-Hadhrami-Structural Option
Design of Gravity Systems (cont.)
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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
Design of Gravity Systems (cont.)
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
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
Design of Gravity Systems (cont.)
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
Two-way Slab with Beams
– British Stand.
Design Results
Item
Value
Slab thickness
10.5”
Maximum deflection
0.236 in
Comment
<< Allowable
Agricultural Hall and Annex
Ismail Al-Hadhrami-Structural Option
Lateral System
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Seismic controls

Concrete Moment Frames

SAP 2000
Agricultural Hall and Annex
Ismail Al-Hadhrami-Structural Option
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
Lateral System (cont.)
Agricultural Hall and Annex
Ismail Al-Hadhrami-Structural Option
Lateral System (cont.)
Agricultural Hall and Annex
Ismail Al-Hadhrami-Structural Option
Lateral System (cont.)

Design Result
Column
Sizes
One-way
Skip Joist
Flat Slab
US
Codes
Flat Slab
British
Codes
Two-way
with beams
18” x 18”
24” x 24”
Varies
20” x 20”
22” x 22”
24” x 24”
Varies
14 x 14
18” x 18”
20” x 20”
Agricultural Hall and Annex
Ismail Al-Hadhrami-Structural Option
Steel Structure
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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
Steel Structure (cont.)

Typical Floor Plan
Added
columns
Braced
Braced
frames
Frames
Moment Frames
Agricultural Hall and Annex
Ismail Al-Hadhrami-Structural Option
Steel Structure (cont.)

Braced and Moment Frames
Agricultural Hall and Annex
Ismail Al-Hadhrami-Structural Option
Steel Structure (cont.)

Design Results
Agricultural Hall and Annex
Ismail Al-Hadhrami-Structural Option
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
Steel Structure (cont.)

Stress Design Check (Interaction Eq.)
0.8 – 0.89
Agricultural Hall and Annex
Ismail Al-Hadhrami-Structural Option
Construction Management
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RSMeans 2005
ICE 2000
MC2
Modification Factor =0.96
Agricultural Hall and Annex
Ismail Al-Hadhrami-Structural Option
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
XXXX
Ismail Al-Hadhrami-Structural Option
Construction Management (cont.)
System Comparison ( Concrete vs. Steel)
System
$ Cost
One-way Wide
Module Joist
573,600
Composite Steel
with Composite
Metal Deck
278,200
Agricultural Hall and Annex
Preferred
System
XXXXXX
Ismail Al-Hadhrami-Structural Option
Conclusion

US Standards
- Concrete vs. Concrete
-Wide Module One-way Joist
- Concrete vs. Steel
- Composite Steel with Composite Metal Deck
Conclusion (cont.)

British Standards
- Concrete vs. Concrete
-Two-way with interior Beams
Acknowledgment
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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
Questions?