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