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200 Minuteman Drive

200 Minuteman Drive. New Design for Additional Floors and Vibration Sensitive Equipment. Brent Ellmann Structural Option Dr. Linda Hanagan - Consultant. Project Players. Owner- Brickstone Properties Architects-Burt Hill Kosar Rittleman Associates

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200 Minuteman Drive

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  1. 200 Minuteman Drive New Design for Additional Floors and Vibration Sensitive Equipment Brent Ellmann Structural Option Dr. Linda Hanagan - Consultant

  2. Project Players • Owner- Brickstone Properties • Architects-Burt Hill Kosar Rittleman Associates • Structural Engineers- Atlantic Engineering Services • MEP Firm- H. F. Lenz Co. • C M Firm- Gilbane Building Company • Geotechnical Firm- Miller Engineering and Testing, Inc.

  3. Existing Building Conditions • Location: Andover, MA • 3 stories with 260,000 square feet of office space • Cost: $15 million

  4. Existing Structure • Composite floor system • K joist roof framing • Square footings and strip footings • Braced frames PICTURES

  5. Existing Mech./Elec./Arch. • Mechanical • 6 air handling units with DX cooling coils (25,000 CFM) and ducted supply with a plenum return VAV system • 2 cast iron- sectioned boilers (Gross Output – 2103 MBH) • Electrical • Main switchboard is a 480 Volt/2500 Amp switchboard • Typical light is a three tube FO32/T-8 fluorescent fixture • Architectural • Insulated metal panels, with low-E reflective glazing, along the curved northern façade • Southern facing wall is a limestone veneer

  6. Goals of New Design • Maintain owner’s original wishes while adding additional floors • All steel building • Open office plan to allow for future tenant changes • Improve performance of floor under vibration excitement due to walking for sensitive equipment • Allow for varying use of building by multiple tenants at once

  7. General Work Completed • Structural (Emphasis) • Floor Vibration Study • Column Design • Foundation Design • Braced Frame Design • Foundation Design • Mechanical (Breadth) • Increased Air Handling Capacity • Duct Sizing • Electrical (Breadth) • Increased switchboard capabilities • Increased direct feed to mechanical equipment

  8. Presented Information • New Building Height and Floor Determination By Code • Brief Overview of Mechanical and Electrical Design • Floor Design for Sensitive Equipment • Column Design • Braced Frame Design • Foundation Design

  9. Original Building • 14’-7” floor to floor height • Roof Height??? • 10’-0” tall clerestory • 2 Mechanical Penthouses

  10. New Design • Floor to floor heights???? • 10’-0” clerestory maintained • New Building height • Under code height

  11. New Design Elevation New Building Size: ####### Square Feet

  12. Mechanical Design • New Requirements • New Equipment Sizes and Numbers • New Duct Sizes

  13. AHU Locations

  14. Electrical Design • New Requirements • New Switch Board Sizes and layouts

  15. Structural Design • Floor Vibration Study • Column Design • Braced Frame Design • Foundation Design

  16. Floor Vibration Criteria • Goal: Allow for a variety of technology and research based companies to use this facility. • Design carried out using Design Guide 11 and the development of a spreadsheet

  17. Compared Systems Original System Original System

  18. Comparison

  19. Floor Vibration Conclusions

  20. Column Design • 2 Types of Columns • Columns with mechanical equipment on top • Columns without mechanical equipment on top

  21. Typical Columns Mechanical Column Non-Mechanical Column

  22. Column Splices • Splices located three feet above floor level of 3rd floor

  23. Braced Frame Design • Structure is located in a zone of high seismic activity • Earthquake forces govern lateral resisting system design Wind Loads Earthquake Loads

  24. Frame Locations

  25. Critical Frames

  26. Critical N-S Frame • Columns: • Braces: • Beams:

  27. Critical E-W Frame • Columns: • Braces: • Beams:

  28. Foundation Design • Square footings used under columns and strip footings used around perimeter of building • Engineered soil placed under footings • Compressive Strength = 6,000 psf • 3,000 psi concrete used for all footings

  29. Non-Mechanical Footings

  30. Mechanical Footings

  31. Critical Frame Footings

  32. Uplift Force • Problem: • Earthquake forces develop large uplift on footings • Solution: • Grade Beam attaching to other footings

  33. Grade Beam • 3’-0” x 5’-0” beam spanning over four square footings • Reinforcement!?!?!?!?!?!

  34. Grade Beam Positioning

  35. Conclusions

  36. Thank You

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