Robert M. Arnold Robert M. Arnold BuildingBuilding
Fred Hutchinson Cancer Research Fred Hutchinson Cancer Research CenterCenter
Project Team Architecture
Construction Management
Mechanical & ElectricalAffiliated Engineers Inc.
StructuralKPFF Consulting Engineers
Zimmer Gunsul Frasca Partnership
Turner construction Company
1100 Fairview Seattle, Washington
$90,825,000
LEED Certified Building
Office SpaceParking Garage
Laboratories
2005 Masonry Honor Award
372,503 ft2
Existing Structural SystemG
ravit
y S
yst
em
Typical Bay
Plaza
5th Floor Laboratories
Mechanical Level, Roof, & Penthouse
Distributed & Banded Tendons
Post-Tensioned
[30’ x 30’]
8 ½” Flat Plate w/ Drop Panels
Beam Size VariesOne-Way Slabs w/ Beams
Cast in Place Reinforced Concrete Slab
Steel Framing
Rectangular HSS Columns
W Shape Beams
13” Reinforced Concrete Slab
30'
30'
10'
10'
Existing Structural SystemLa
tera
l S
yst
em
Reinforced Concrete Shear Walls20” & 24” thick
Special Boundary Elements
Braced Frames (Upper Levels)Chevron Braces
X-BracesDiagonal Braces
Seismic Controls Design
Base Shear: 5980 kip
Proposed Alternative Structural Design
Proposal: Frame Main Portion of Building out of Steel
Why?:Reduce Building Mass
Improve ConstructabilityWhy Not the Entire
Building: PLaza & Parking GarageMechanical, Roof, & Penthouse
New Structural System
Composite Beams
Steel Columns
Floor Framing
Composite Girders
RAM Structural System
Typical Sizes
W 16 x 26
W 16 x 31
Typical Sizes
W 24 x 55
W 21 x 50
Typical Sizes
W
W
Typical Live Load: 75 lb/ft2
New Structural System
EXCEPTION:
Minimal Architectural Impact
Floor
Fram
ing
1 Column addition
Architectural Considerations
Columns – maintain location as per original design
Discontinued @ & below Level 1
Vibrations: Preliminary Analysis 5th Floor – Laboratory Area
Evaluation for Walking Excitation
Lab Equipment is more sensitive to vibration
Second analysis recommended
ap = 0.00408 < 0.005
Braced Frames
Columns: W14 Shapes
X – Bracing: Rect.HSS columns
Ordinary Braced Frames
Concentrically Braced Frames
Special Braced Frames
Simplifying the Design Process
Grouped Structure down to Level 5
Construction Management of Alternative Design
Steel Alternative Cost was Estimated using Integrate Cost Estimating
Overall savings
Complete Building Cost Estimate was not completed-
Steel Alternative Cost was Estimated using Integrate Cost Estimating
$1.8 million
Green Roof RetrofitBenefits
Rainwater Retention & DetentionOffsets peak runoff from peak rainfallLower roof surface temperature during summerhelps to reduce the urban heat island effect
Types of Green RoofsExtensiveSemi-intensiveIntensive
Back
gro
un
d
Benefits
Rainwater Retention & Detention
Lower roof surface temperature during summer
Helps to reduce the urban heat island effect
Green Roof: Architectural Design
Potential Areas for Green Roof– Intensive
• roof area accessible & viewable by the existing roof terrace
– Extensive• upper roof• lower roof
– None• stairwells• small area with limited access• mechanical enclosures• skylights• plaza
Green Roof Design Decision– Intensive
• NONE– Intensive
• All Potential Areas not f easibil e
intensive gr eenr oofextensive gr eenr oofnot possibl e
Green Roof: Architectural Design
Roof
Con
stru
ctio
n
[Gardendrain GR 30]
Sedum Planting Layer
Rigid Insulation
6” Roof Lite Extensive MC
Root Barrier
Hydrotech Gardendrain GR 30
EPDM [ Water Proofing Membrane]
Green Roof: Drainage
Stormwater RunoffRational Method (Runoff Model)
Typical Roof: 0.95
Does Not consider delayed runoff rate
Design Rainfall: 1 inch/hour
Leader SizingBased on Projected Area
& Percentage of Vertical Surface Areas
Lawn (Sandy Soil): 0.10
During sustained storm event rate can reach that of typical roof
Total Drainage Rate: 19 gpm
(28) 2 inch Leaders
(14) 3 inch Leaders
Total Drainage Area: 76,425 ft2
Green Roof: Construction Management
Cost Analysis [RS Means Renovation & Maintenance]
Replacement w/ Ballasted EPDM
Replacement w/ Green Roof
Ballasted EPDM: 3 @ $253,000 = $759,000Life Cycle [50 year period]
Extensive Sedum: 1 @ $360,000 = $360,000
@ $4.55/ft2 = $253,000
@ $6.47/ft2 = $360,000
Recommendation: Green Roof Installation @ Time of Replacement
Questions ?