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

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

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

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

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

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

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

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

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

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

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

13. AHU Locations

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

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

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

17. Compared Systems Original System

18. Comparison CompositeNon-Composite

19. Floor Vibration Conclusions

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

21. Typical Columns Mechanical ColumnNon-Mechanical Column

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

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

24. Frame Locations

25. Critical Frames

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

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

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

29. Non-Mechanical Footings

30. Mechanical Footings

31. Critical Frame Footings

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

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

34. Grade Beam Positioning

35. Conclusions

36. Thank You