1. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL 111 Morgan St. Chicago, IL Ryan Friis Structural Option

2. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Presentation Outline Existing Conditions Structural Redesign Cost Analysis Fire Protection Requirements Acoustics Construction Considerations

3. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Project Team Owner:Architect:Engineers:GC: Winthrop Properties, LLC. Fitzgerald Associates Architects Samartano & Co. (Structural) Ketchmark & Assoc. (Mechanical) Ketchmark & Associates (Electrical) McClier Engineers (Civil) Walsh Construction of Illinois

4. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Location Downtown Chicago Corner of Adams & Morgan St. 5 blocks west of the Sears Tower

5. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Building Info 9 Story Condominium Building Total Building Height - 98’-0” 166 Units Located on 7 Floors 180,000 Sq. ft. of residential space Prices range from $200,000 – $450,000 184 Parking Spaces on 3 Floors

6. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Building Info 1, 2 or 3 Bedroom units Oak hardwood floors Granite countertops Gas fireplaces in every unit Walk-out balconies Luxury Condominiums

7. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Residential Floor Plan

8. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Existing Conditions Structural  2-way Concrete slab gravity system  Typical bay size of 22’-0” x 25’-8”  20” diameter columns of varying strength  Floor to floor height of 10’-9”  8 in. shear walls located in cores

9. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Existing Conditions Structural Floor Plan

10. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Existing Conditions Structural  Original Design - Chicago Building Code 1999  Seismic Design not required  Redesign - IBC 2000  Assume wind loads control

11. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Existing Conditions Architectural  Exposed concrete structure  Unpainted mechanical ductwork and sprinkler piping

12. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Redesign Goals Provide finished ceiling at 9’-6” minimum Add 2 floors of residential units & 1 parking floor Reduce column footprint Keep existing floor plan intact Avoid major cost increases Use existing concrete parking garage

13. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Structural Redesign Gravity systems considered Steel Joists Standard W shapes Composite W shapes

14. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Structural Redesign Composite Steel Design best choice Saves 113 tons versus non-composite design Allows for greater spacing than steel joist system Easier to frame balconies with W shapes opposed to joists Does not require a fire rated ceiling

15. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Structural Redesign Framing plan  Beams span E-W  Span length 14’ to 30’  Space 12’-9” o. c.  Beams cantilever over girder to create balcony framing Typical Framing Plan

16. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Composite Steel Design Typical beam size Typical beam size  W12x19 [10] with ¾” camber & W14x30 [12] 6.25” lightweight concrete deck on 3” decking Beams cambered to account for wet concrete load Live load member deflection limited to L/360 Typical connection uses 1/4” shear tab with 3 - A325 N bolts and 3/16” weld

17. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Composite Steel Design Floor to floor height increased to 12’-6”  Maintains 9’-6”’ ceilings  Leaves room for mechanical systems and provides space for finished drywall ceiling Typical columns are W8 and W10  Maximum column size 15”x13” when framed

18. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Structural Redesign Floor vibrations of 0.43%g maximum Overall building is lighter by 30% Permits use of 6,000 psi concrete in parking garage  Down from 8000 psi in existing system Existing caisson foundation can be used

19. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Structural Redesign Lateral Force Resisting System Options Column layout prevents use of braced frames Consider moment frames Modify existing shear wall system

20. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Revised Lateral Design Existing shear wall layout maintained Shear walls increased in size from 8” to 12” in E-W direction Walls remain 8” in N-S direction Total drift limited to H/600 Actual drift of 2.5” in E-W direction All walls use 4,000 psi concrete

21. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Cost Analysis Cost analysis for structural system  All costs calculated using R.S. Means and adjusted to 2001 dollars in Chicago, IL  Costs include material, labor, equipment, and overhead and profit

22. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Cost Analysis Concrete cost per floor  $384,312 Composite steel cost per floor  $476,190 ($390,700 excluding ceiling)  Includes: extra building façade$27,429 fireproofing$27,731 additional partition height$8,450 finished ceiling$85,500  Cost Reductions  6,000 psi concrete in garage and 4,000 psi concrete in remaining shear walls $38,000 concrete in remaining shear walls $38,000

23. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Fire Protection 2 Hr. fire rating required between floors and units  As built  8.5” two-way slab achieves fire rating  Steel system  6.25” Slab on 3” USD Lok-Floor provides a 2 hr rating without fire proofing  1 1/8”+ Spray-on Fire resistive material required on beams and columns (vermiculite based)  Walls between units need to extend slab to slab  Fireproofing in gaps created by corrugated deck

24. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Acoustics Only minor changes between units on same floor Transmission between floors is a concern STCIIC Acceptable: 6054 Concrete: 6560 Steel: 6260

25. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Construction Considerations Use same erection sequence as original system  Shear walls in North first then steel  Shear walls in South during steel erection in North Schedule  Erection of first steel floor will take an additional week  Additional 6 weeks overall for 3 additional floors Site management  Just in time delivery of steel for daily erection  Use alley on building’s east side to stage trucks

26. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Conclusions Composite steel system  Accommodated 2 additional floors  Provided easy installation of ceiling  Reduced column size  Improved overall appearance of condo units  Structural system costs equivalent to existing

27. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Recommendation Maximum luxury appearance is gained with the steel system  Due to the exposed columns in the existing system it is not worth adding the ceiling  If additional floors were added to the concrete system the columns could become larger

28. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Thank You Dave Heselbarth & Walsh Construction AE Faculty 5 th Year Students

29. Senior Thesis Structural Option Ryan Friis Spring 2003 111 Morgan St. Chicago, IL Questions