Mountain Ridge Project - winter presentation - AEC The making of Ridge University Engineering Building E ngineerMartha Del Campo, Stanford, CA A rchitectKatrin Wender, Weimar, Germany O wnerRegina Pau, Sunnyvale, CA C onstruction Manager Kris Grotelueschen, Stanford, CA APP renticeGrace Yamamoto, Stanford, CA

Site conditions AEC

Functional spaces and relationship AEC

Dead Loads –Lightweight Concrete Slab: 55 psf –Steel Deck: 5 psf –Partition Walls: 20 psf –Finishes, Lights: 10 psf –Ducts, Pipes: 5 psf –Roofing System: 25 psf Live Loads –Offices: 50 psf –Classrooms: 40 psf –Auditorium: 50 psf –Corridors: 100 psf –Snow: 50 psf (Altitude~2500 ft.) AECAEC Gravity Loads

Sample Gravity Load Path AECAEC

Wind –Exposure B –V 33 = 70 mph Earthquake –Zone 3 –Type B Fault Zone Lateral Loads AECAEC

Sample Lateral Load Path AECAEC

Soil –Stiff Sand –Bearing Capacity: 5 ksf –Low settlement –Frost Depth: 4 ft. Foundation –Wall footings at perimeter –Column footings under interior columns –Slab on Grade Foundation Considerations AECAEC

Construction AEC Budget is reduced for 4% inflation over the next 14 years. (2015 Budget = 2001 Budget x ) The money available for the building is further reduced by overhead and profit.

Redesign - design concept AEC “soft fluid among stones – water among stones“

AEC Redesign - schematic layout

AEC

Redesign - schematic layout AEC

Redesign - circulation

AECAEC Redesign - Structure

AECAEC Original DesignRedesign Perimeter frame with staggered truss Retain Exterior bracingRetain King-post truss over Auditorium Retain Shear Wall corePropose braced frame core Add basement for gymnasium

Eccentrically Braced Frame –Efficient, ductile system –Eliminates need to coordinate concrete and steel workers Shear Wall –Ductile in combination with frame system –Traditional, widely used –Less expensive in general AECAEC Redesign - Structure

Redesign - Construction AEC Foundations Complete 7/1/15 Superstructure Complete 10/14/15 Building Closed In 1/6/16 Finishes Complete 5/25/16

Redesign - Construction AEC Total Budget: $2,842,260 Breakdown of Costs:

Redesign - Construction AEC Largest crane pick is a 3 kip column Hydraulic excavator for basement Concrete will be placed with a pump Construction Equipment

Redesign - Construction AEC Material Laydown Site Office Sub Trailers Site Parking Additional Material Area Site Entrance Moving Crane Direction of Progression

Alternative 2 - design concept AEC “water among stone – water on the mountain”

AEC 213 Alternative 2 – schematic layout

Alternative 2 - circulation AEC 123

Alternative 2 – exterior and interior

AECAEC Alternative 2 - Structure

AECAEC Concept –Maximize floor-to- ceiling height Thin slab on columns Eliminate internal beams –Reduce finishing costs –Allow large windows APP E E C C Alternative 2 - Structure

Drop panel Slab Column AECAEC Gravity System –Flat Slab System Minimum allowable depth: 7 in. (probably greater) –Post-tensioned slab Approximate depth: 8 in. –Waffle slab over Auditorium Approximate total depth: 24.5 in. (4.5 in. top slab) 30” x 30” voids, 36” Alternative 2 - Structure

AECAEC Lateral Load Systems –Concrete Cast in Place SMRF –Precast Concrete SMRF –Shear Wall for redundancy Typical Member Sizes: Ext. Beam: 18x24 in. Ext. Column: 18x18 in. Int. Column: 12x12 in. Alternative 2 - Structure

AECAEC Sample Connection Details –Cast in Place SMRF –Precast sMRF (from pankow.com) Alternative 2 - Structure mild steel bars post-tensioning

Exterior Cladding –Finished concrete (CIP or Precast) Saves material cost Concrete must be designed for thermal effects –Precast stone cladding Adds cost for material and installation Lightweight materials Lower life-cycle costs (i.e. insulation) AECAEC Alternative 2 - Structure

Roofing System and Skylight AECAEC Alternative 2 - Structure Wood truss with steel tension members

Alternative 2 - Construction AEC Foundations Complete 6/24/15 Superstructure Complete 9/23/15 Finishes Complete 6/1/16 Building Closed in 12/16/15

Alternative 2 - Construction AEC Total Budget: $2,732,912 Breakdown of Costs:

Alternative 2 - Construction AEC Largest crane pick for bucket of concrete Hydraulic excavator for foundations Concrete will be placed with a bucket Construction Equipment

Alternative 2 - Construction AEC Material Laydown Site Office Sub Trailers Site Parking Additional Material Area Site Entrance Moving Crane Direction of Progress

Alternative 3 - design concept AEC “water among stones – waterfall and rocks“

AEC Alternative 3 – schematic layout

AEC Alternative 3 – schematic layout

AEC Alternative 3 – schematic layout

Alternative 3 - circulation AEC

AECAEC Alternative 3 - Structure

AECAEC A/E Interaction Alternative 3 - Interaction E Change Concept A ProposalE Proposal A Feedback Design

AECAEC Lateral Load Systems –Steel EBF Core –Concrete Shear Wall Core Gravity Load Systems –Concrete Frame –Steel Frame –Composite floor slab Steel: Typical Column: W14 x 74 Worst-Case Beam: W18 x 60 Concrete: Typical Column: 18” x 18” Worst-Case Beam: 18” x 30” Alternative 3 - Structure

Details AECAEC Alternative 3 - Structure Steel: Concrete:

Alternative 3 - Construction AEC Foundations Complete 6/18/15 Superstructure Complete 9/11/15 Building Closed In 12/10/15 Finishes Complete 5/12/16

Alternative 3 - Construction AEC Total Budget: $3,447,825 Breakdown of Costs:

Alternative 3 - Construction AEC Largest crane pick for 3.5 kip steel column Hydraulic excavator for foundations Concrete will be placed with a pump at the foundations, and shotcrete for the shear walls Construction Equipment

Alternative 3 - Construction AEC Material Laydown Site Office Sub Trailers Site Parking Additional Material Area Site Entrance Moving Crane Direction of Progress

Construction AEC

Final Decision Matrix A E C Benefits Draw - backs Design like last years Public space areas Lack of daylight Only one entrance Owner’s choice 2 Entrances Privacy/security req. good Concrete system Straightforward structure No extended footprint Efficient structural Concrete shear core Fun spiral stairs Concrete frame & slab better MEP & floor depth Not risky for A Roof truss & MEP intake Stream threats Skylight leaking Extended footprint Deep floor beams & MEP Lack of vertical mechanical path space $2.8 Million 5/25/16 $2.7 Million 6/01/16 $3.4 Million 5/12/16

Design Process timeline Week 1-3Week 4-6Week 7-8Week 9-10 A Understand program, discussion Redesign, consult E Initial Alt3 concepts, form idea Completion A proposal E Collecting general information Redesign & A Alt2, consulting mentors & C Alt3 & talking with A C Collecting general information & mentors Quantities & materials Quantities, materials (AE), schedule & mentors Schedule & Equipment & mentors APP confusion Decide on Alt2 Archit. Consult A Design basics and consult AEC Asking and adjusting

Team Interaction- Clerestory Windows AEC Narrow Hallways ECEC APP E C $$$ A APP A C E OK Concept!

Lessons Learned/ Future Improvements AEC Lessons:Improvements: Clarified discipline goals and roles in design, how disciplines respond to information Skill recognition Clear, straightforward, proactive synchronous and asynchronous communication Organizing information for documentation (i.e., web site) Working with technology More thorough use of communication resources (i.e, Recall) More efficient presentation of ideas Better online documentation of information and process

Final choice - challenges AEC architecture: some interesting questions still open - facades ? - roof garden ? - spiral stairs engineer: Concrete system Atrium skylight MEP space construction manager: Reduce budget through continued value engineering Integration of mechanical systems into current architecture Use of shotcrete for shear walls System for glass roof area team interaction: Value enginering for budget