mountain ridge project - winter presentation - aec the making of ridge university engineering...

Mountain Ridge Project- winter presentation -

AECAEC

The making of

Ridge University Engineering Building

Engineer Martha Del Campo, Stanford, CA

Architect Katrin Wender, Weimar, Germany

Owner Regina Pau, Sunnyvale, CA

Construction Manager Kris Grotelueschen, Stanford, CAAPPrentice Grace Yamamoto, Stanford, CA

Site conditions

AECAEC

Functional spaces and relationship

AECAEC

• 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.)

AEC

Gravity Loads

Sample Gravity Load Path

AEC

• Wind– Exposure B

– V33 = 70 mph

• Earthquake– Zone 3– Type B Fault Zone

Lateral Loads

AEC

Sample Lateral Load Path

AEC

• 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

AEC

Construction

AEC

$5,500,000

$3,105,703

$2,733,019

$0

$1,000,000

$2,000,000

$3,000,000

$4,000,000

$5,000,000

$6,000,000

Budget in 2001 Budget in 2015 Assuming 4%Inflation

Final Buget Assuming12% forOverhead and Profit

•Budget is reduced for 4% inflation over the next 14 years.

(2015 Budget = 2001 Budget x0.9614)

•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

Redesign - schematic layout

AEC

Redesign - schematic layout

AEC

AEC

Redesign - circulation

AEC

Redesign - Structure

AEC

Redesign - Structure

Original Design RedesignPerimeter frame with staggered truss

Retain

Exterior bracing Retain

King-post truss over Auditorium

Retain

Shear Wall core Propose 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

AEC

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

Electrical13.3%

Mechanical22.4%

Conveying1.4%

Superstructure32.6%

Roofing0.9%

Interior Construction

15.3%

Exterior Closure5.8%

Substructure1.1%

Foundations4.3%

Special Construction

2.9%

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 LaydownSite Office Sub TrailersSite

Parking

Additional Material Area

Site Entrance

Moving Crane

Direction of Progression

Alternative 2 - design concept

AEC

“water among stone – water on the mountain”

AEC

21 3

Alternative 2 – schematic layout

Alternative 2 - circulation

AEC

1 2 3

AEC

Alternative 2 – exterior and interior

AEC

Alternative 2 - Structure

AEC

• Concept– Maximize floor-to-

ceiling height• Thin slab on columns• Eliminate internal

beams

– Reduce finishing costs– Allow large windows

APPAPP

EECC

Alternative 2 - Structure

Drop panelSlab

Column

AEC

• 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, 6”ribs @ 36”

Alternative 2 - Structure

AEC

• 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

AEC

• 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)

AEC

Alternative 2 - Structure

• Roofing System and Skylight

AEC

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

Electrical13.3%

Mechanical22.4%

Conveying1.4%

Superstructure32.6%

Roofing0.9%

Interior Construction

15.3%

Exterior Closure5.8%

Substructure1.1%

Foundations4.3%

Special Construction

2.9%

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 OfficeSub 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

AEC

Alternative 3 - Structure

AEC

• A/E Interaction

Alternative 3 - Interaction

E Change Concept

A Proposal E Proposal

A Feedback

Design

AEC

• 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

AEC

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

Electrical13.3%

Mechanical22.4%

Conveying1.4%

Superstructure32.6%

Roofing0.9%

Interior Construction

15.3%

Exterior Closure5.8%

Substructure1.1%

Foundations4.3%

Special Construction

2.9%

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 LaydownSite Office Sub TrailersSite

Parking

Additional Material Area

Site Entrance

Moving Crane

Direction of Progress

Construction

AEC

$3,447,825$2,732,912$2,842,260$2,733,019

$3,105,703

$5,500,000

$0

$1,000,000

$2,000,000

$3,000,000

$4,000,000

$5,000,000

$6,000,000

Budget in 2001 Budget in 2015Assuming 4%

Inflation

Final BugetAssuming12% for

Overhead andProfit

Alternate #1 Alternate #2 Alternate #3

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 verticalmechanical path space

$2.8 Million5/25/16

$2.7 Million6/01/16

$3.4 Million5/12/16

Design Process

timeline Week 1-3 Week 4-6 Week 7-8 Week 9-10

AUnderstand program, discussion

Redesign, consult E

Initial Alt3 concepts, form idea

Completion A proposal

ECollecting general

information

Redesign & A

Alt2, consulting mentors &

C

Alt3 & talking with

A

CCollecting general

information & mentors

Quantities & materials

Quantities,materials

(AE), schedule &

mentors

Schedule & Equipment & mentors

APP confusionDecide on Alt2 Archit.Consult A

Design basics and

consult AEC

Asking and adjusting

Team Interaction- Clerestory Windows

AECAEC

Narrow Hallways

ECAPP

E C$$$

A

APP

A C EOK

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

AECAEC

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