601 New Jersey Avenue Washington, D.C. Alternative Construction Materials Amber L. House Structural Option

1. 601 New Jersey Avenue Washington, D.C. Alternative Construction Materials Amber L. House Structural Option

2. Thesis Overview • Building Introduction • Structural Depth • Architectural Breadth • Construction Management Breadth • Conclusions • Acknowledgements • Questions Presentation Outline:

3. Thesis Overview • Building Introduction • Structural Depth • Architectural Breadth • Construction Management Breadth • Conclusions • Acknowledgements • Questions Presentation Outline:

4. Replace Existing Floor System • Investigate the Impacts of this Change on other Systems • Determined How this Change will influence the Cost and Construction Schedule • Summarize Owner’s Options. Thesis Overview:

5. Thesis Overview • Building Introduction • Structural Depth • Architectural Breadth • Construction Management Breadth • Conclusions • Acknowledgements • Questions Presentation Outline:

6. Purpose: • Win the tenancy of the Federal Trade Commission • Location:Washington, D.C. • Size: • Office: 258,000 sq ft. (9 stories) • Garage: 90,000 sq ft. (3 levels) • Completed:August 2001 Building Introduction:

7. Project Team: • Owner:Lowe Enterprises & Teacher’s Insurance Annuity Association • General Contractor:James G. Davis Construction Co. • Architect:Hickok Warner Fox Architects • Civil Engineers: Delon Hampton & Associates • MEP Engineers: Girard Engineering, Ltd. • Structural Engineers: Structural Design Group, Ltd. Building Introduction (con’t):

8. Site: • Shape • Special features: • Limitations: • 110 foot Height • Minimum Site Parking • 1 spot per 1800 sq ft. • Square Feet Building Introduction (con’t):

9. Thesis Overview • Building Introduction • Structural Depth • Architectural Breadth • Construction Management Breadth • Conclusions • Acknowledgements • Questions Presentation Outline:

10. Floor System • Columns • Foundations Structural Depth:

11. Floor System • Columns • Foundations Structural Depth:

12. Existing Office: • 3.25 inch light weight concrete • 3”- 20gage steel deck • Composite steel beams • Occupies 24.5” of floor space • 40 foot spans Floor System:

13. Existing Garage: • Two way system • 9” slab • 3.5” Drop panels Floor System (con’t):

14. Redesigned Garage: (same) • Redesigned Office: • Two way slab • 10.5” depth • 3.5” Drop panels typical • 5.5” Drop panels • 12” X 17.5” edge beam Floor System (con’t):

15. Floor System (con’t):

16. New Office: • Two Way Slab Design Method (ADOSS) Floor System (con’t):

17. New Office: • One Way • (1) #6 @12” Floor System (con’t):

18. New vs. Old Office Floor System: • Advantages: • Requires 14” less space floor to floor space. • 10th floor can be added (28,500 sq ft.) • Low vibrations • Easy to form into shapes • Room for Sprinklers • Common material in D.C. area • Disadvantages: • Columns in office space • Heavier system • Formwork Floor System (con’t):

19. Floor System • Columns • Foundations Structural Depth:

20. Existing: • Steel W shapes • Start at first floor • Typically span three floors • New: • Square Concrete • F’c = 4000 psi upper levels • F’c = 5000 psi lower levels • Sizes: • Typically 16” x 16” to 24” x 24” • 9 typical columns were designed Columns:

21. Impact Analysis: • At lowest garage level • Columns D13 & E7 Columns (con’t):

22. Impact Analysis: • Vehicle • Vehicle: Large SUV • Weight: 5000lb • Bumper height~ 36 in • Acceleration 0-60mph in 8.5 seconds • Assumptions: • Deceleration of vehicle in 0.5 seconds. • Central impact • Final velocity of automobile = 0 • Column velocity = 0 • Speed from sloped floor ignored Columns (con’t):

23. Impact Analysis: Columns (con’t):

24. Impact Analysis: Columns (con’t):

25. Floor System • Columns • Foundations Structural Depth:

26. Existing Structure: • Soil Conditions: • River terrace deposits consisting of clay, silt, sand and gravel underlain by residual materials • Contains concrete, brick and other construction debris • Ground water at depths ranging from 13 to 29 feet below the existing grade. • Maximum allowable soil bearing pressure of 6000 psf. • Interior Foundations: • Concrete F’c = 3000 psi • Reinforced • Square Foundations:

27. Existing Structure: • Perimeter Foundations: • Concrete F’c = 3000 psi • Reinforced Fy= 60 ksi • Rectangular • Strap beam Foundations (con’t):

28. Redesigned Structure: • Interior Foundations • Only 10. 5” from perimeter foundation. Foundations (con’t):

29. Redesigned Structure: • Perimeter Foundations • Loads less than existing • Removed strap beam • Used a combined footing Foundations (con’t):

30. Redesigned Structure: • Core Foundations Foundations (con’t):

31. Thesis Overview • Building Introduction • Structural Depth • Architectural Breadth • Construction Management Breadth • Conclusions • Acknowledgements • Questions Presentation Outline:

32. G-Street Facade • Ceiling & Floor Heights • Columns in Office Space Architectural Breadth:

33. G-Street Facade • Ceiling & Floor Heights • Columns in Office Space Architectural Breadth:

34. G- Street Facade:

35. Redesigned Structure: • Change in column location G- Street Façade (con’t):

36. G-Street Facade • Ceiling & Floor Heights • Columns in Office Space Architectural Breadth:

37. Redesigned Structure Ceiling Height: • 8’6” ceilings on floors 2-10 maintained • 1st floor ceiling height reduced by 4” • Existing: 10’7” • New: 10’3” • Existing Floor-to-Floor Heights: • Floors 2-9, 11.91’ • 1st floor, 14’ • Redesigned Structure Floor-to-Floor Heights: • Floors 2-10, 10’10” • 1st floor, 12’6” Ceiling & Floor Heights:

38. G-Street Facade • Ceiling & Floor Heights • Columns in Office Space Architectural Breadth:

39. Parking Garage: • Existing Construction: • 198 parking spaces • Redesign • Loss Approx 9 % of parking • 180 parking spaces remain Columns in Office Space:

40. Parking Garage: • Minimum site requirements Columns in Office Space (con’t):

41. Office Space: • Existing Columns in Office Space (con’t):

42. Office Space: • Redesigned Columns in Office Space (con’t):

43. Office Space: • Redesign Layout Columns in Office Space (con’t):

44. Columns in Office Space (con’t):

45. Thesis Overview • Building Introduction • Structural Depth • Architectural Breadth • Construction Management Breadth • Conclusions • Acknowledgements • Questions Presentation Outline:

46. Schedule • Cost Construction Management:

47. Schedule • Cost Construction Management:

48. Existing Schedule: • Design Phase: Start 1/14/ 2000 32.2 weeks • Fabrication/Delivery of Major Building materials: Start 1/27/2000 • Foundations: Start 10/18/2000 16.8 weeks • Superstructure: Start 2/27/2001 21.2 weeks • Spray on Fireproofing: Start 4/20/2001 22.1 weeks • Schedule of Redesigned Structure: • 12 weeks to pour 10 floors • 4 weeks for fabrication of rebar • Fast track Construction • Spray on fireproofing eliminated Schedule:

49. Schedule • Cost Construction Management:

50. Existing Structure: • Actual: $24,330,000.00 • Includes garage and office • R.S. Means Square Foot Cost: Cost: