2001 Winter Presentation Site Location Site View Site
- Slides: 45
2001 Winter Presentation
Site Location
Site View
Site History 1923 1968 Boston Improved Sewage 1972
Site Constraints § Peninsula, surrounded by water § Area of in-filled land § Winter snow
Engineering Constraints n Soil Properties n n n Compactable Soil 4000 psf bearing capacity Capacity, silt/clay and sand mixture 20’ water table Loading n n Live Load Dead Load Wind Load Roof Load 50 70 35 28 psf psf
Budget Information
Architect’s Vision “With a clear understanding of the historical influences of site, the land, the harbor, the history of Boston…”
Architectural Design 1 (Redesign) n n Keep the integrity of the DOME Allow open center to remain Evaluate programmatic functionality Relocate sloped floor rooms to basement level for ease of constructability of slabs
Architectural Design 1 (Redesign)
Engineering Design 1 Steel (Redesign) n n Composite steel design Regular column grid Easy installation Steel moment frame Typical Beam: W 14 X 26 c=1” Moment Frame: W 16 X 36
Design 1 Steel Estimate (Redesign) n Total = $3, 145, 000
Engineering Design 1 Precast (Redesign) n n 12” masonry wall 24” deep precast concrete girders
Design 1 Precast Estimate (Redesign) n Total = $3, 231, 000
Design 1 Schedules n Finish Dates: n n Durations: n Precast Steel - 09/28/16, Precast - 10/05/16 Steel – 8 mo & 4 wks, Precast – 9 mo
Architectural Design 2 n Concepts n n n Flow like the waves of the bay Structure like the hull of a boat Gesture towards the historic influence of the site Open walls towards the oak trees Individuality between faculty and students
Architectural Design 2 Auditorium Classrooms, seminar rooms, labs Student offices Faculty offices, facilities, administration
Engineering Design 2 Steel § Gravity System § Composite steel design § No truss for auditorium Typical Beam W 14 X 30 Typ Girder W 24 X 55 Typ Col W 12 X 40 Auditorium beam w 24 X 76
Engineering Design 2 Steel § Steel bracing § Tube 3 X 3 X 1/4 § Foundation layout § Strip & spread footings
Design 2 Steel Estimate n Total = $2, 722, 000
Engineering Design 2 Precast Concrete gravity system § Load bearing wall, 2 -way slab § 48’ post-tensioned girders
Engineering Design 2 Precast § 12” masonry walls § Load path § Foundation layout § 3’ wide strip footing
Design 2 Precast Estimate n Total = $2, 800, 000
Design 2 Schedules n Finish Dates: n n Duration: n Precast Steel - 09/14/16, Precast - 09/21/16 Steel – 8 mo & 2 wks, Precast – 8 mo & 3 wks
Architectural Design 3 n Concepts § Box in a box § Simple, double structure § Advantageous use of sloped classroom and auditorium floors § Flow of light to below grade level § Exterior wood structure to gesture towards trees
Architectural Design 3 Auditorium Classrooms, seminar rooms, labs Student offices Faculty offices, facilities, administration
Architectural Design 3
Engineering Design 3 Steel Inside Frame Plan Gravity System Steel Bracing Tube 3 x 3 x 1/4
Engineering Design 3 Steel Outside Frame Plan Flat Roof Steel Knee Brace Frame
Design 3 Steel Estimate n Total = $3, 083, 000
Engineering Design 3 Wood Inside Frame Plan Gravity System Wood Wall Lateral System
Engineering Design 3 Wood Outside Frame Plan Pre-fabricated wood truss with knee brace Prefab wood truss 2"X 6" Column 12"DIA Knee brace 2"X 6" Joist 2"X 4" Steel Brace 12"X 2"
Engineering Design 3 Wood Outside Structure Load Path Gravity Load Lateral Load
Engineering Typical Connection Steel Bracing Wood With Steel Plate & Bolts
Design 3 Wood Estimate n Total = $2, 978, 000
Design 3 Schedules n Finish Dates: n n Durations: n Wood Steel - 08/24/16, Wood - 09/07/16 Steel – 7 mo & 3 wks, Wood – 8 mo & 1 wk
Equipment Selection Truck Crane Mini Excavator Skid Steer Loader
Budget Comparison
Design Evaluations Design Architect Engineer CM 1 S Attractive Dome Design Moment Frame Is Expensive Constructability & Budget Concerns 1 P Good Circulation Dome Poses Wind Load Problems Constructability & Budget Concerns 2 S Concept Fits Local Area Rigid Diaphragm Problem Best Budget 2 P Least Visually Pleasing Rigid Diaphragm Problem Good Budget 3 S Best Looking Building Girders Have Deflection Problem Very Constructible 3 W Very Interesting Building Sloped Roof Helps Snow Load Very Constructible
Explanation of design rankings: 1=Best… 6=Worst Decision Matrix Lowest point total wins Design Attractive Interest Budget Schedule Total 1 S 4 3 5 5 17 1 P 3 4 6 6 19 2 S 6 5 1 3 15 2 P 5 6 2 4 17 3 S 2 2 3 1 8 3 W 1 1 4 2 8
Design Choice n Design 3 n Best combination of strengths vs. weaknesses were 3 W & 3 S from matrix n Wood/Steel Hybrid • Combine the attractiveness/interest of 3 W with the cost and schedule benefits of 3 S • Keep wood exterior structure of 3 W, but incorporate the steel interior structure of 3 S
Team Dynamics/Interaction
Team Dynamics/Interaction “The most challenging and the most successful part of this whole process is the perpetual learning of our own and each others discipline and how we must collaborate in order to succeed. ” “The structural system is not the only aspect of the building. We need to think about the others' intentions and constraints. Compromising between different intentions is very important in developing a successful project. ” “The greatest thing we will take away from this class is learning how to successfully work in a challenging situation with diverse people on a project with little contact. ”
Lessons Learned n Cross-Discipline Knowledge n n n Teamwork n n Vocabulary Interests/Concerns Tolerance Dependence/Collaboration Organization/Work Habits Technology n New Applications
2001 Winter Presentation Questions?
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