Robert M. Arnold Building Fred Hutchinson Cancer Research Center Project Team

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Robert M. Arnold

Building

1100 Fairview

Fred Hutchinson Cancer Research Center

$90,825,000

Office Space

Parking Garage

Laboratories

Project Team

Architecture

Zimmer Gunsul Frasca Partnership

Construction Management

Turner construction Company

Structural

KPFF Consulting Engineers

Mechanical & Electrical

Affiliated Engineers Inc.

2005 Masonry Honor Award LEED Certified Building

Existing Structural System

Typical Bay [30’ x 30’]

8 ½” Flat Plate w/ Drop Panels

Post-Tensioned

Distributed & Banded Tendons

Plaza

Cast in Place Reinforced Concrete Slab

One-Way Slabs w/ Beams

Beam Size Varies

5 th Floor Laboratories

13” Reinforced Concrete Slab

3 0 '

Mechanical Level, Roof, & Penthouse

Steel Framing

W Shape Beams

Rectangular HSS Columns

3 0 '

1 0 '

1 0 '

Existing Structural System

Reinforced Concrete Shear Walls

20” & 24” thick

Special Boundary Elements

Braced Frames (Upper Levels)

Chevron Braces

Diagonal Braces

X-Braces

Seismic Controls Design

Base Shear: 5980 kip

Proposed Alternative Structural

Proposal:

Design

Frame Main Portion of Building out of

Steel

Why?:

Reduce Building Mass

Improve Constructability

Why Not the Entire

Building: PLaza & Parking Garage

Mechanical, Roof, & Penthouse

Floor

Framing

Composite Beams

Typical Sizes

W 16 x 26

W 16 x 31

Composite Girders

Typical Sizes

W 24 x 55

W 21 x 50

Steel Columns

Typical Sizes

W

W

New Structural System

Typical Live Load: 75 lb/ft 2

RAM Structural System

New Structural System

Architectural Considerations

Columns – maintain location as per original design

EXCEPTION:

1 Column addition

Minimal Architectural Impact

Discontinued @ & below Level 1

Vibrations: Preliminary Analysis

5th Floor – Laboratory Area

Evaluation for Walking

Excitation a p

= 0.00408 < 0.005

Lab Equipment is more sensitive to vibration

Second analysis recommended

Concentrically Braced Frames

Simplifying the Design Process

Grouped Structure down to Level 5

Braced Frames

Ordinary Braced Frames

Special Braced Frames

Columns: W14 Shapes

X – Bracing: Rect.HSS columns

Construction Management of

Alternative Design

Complete Building Cost Estimate was not completed-

Steel Alternative Cost was Estimated using

Integrate Cost Estimating

Steel Alternative Cost was Estimated using

Integrate Cost Estimating

Overall savings

$1.8 million

Green Roof Retrofit

Benefits

Rainwater Retention & Detention

Offsets peak runoff from peak rainfall

Lower roof surface temperature during summer helps to reduce the urban heat island effect

Types of Green Roofs

Extensive

Semi-intensive

Intensive

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 n o t f eas ibil e in t en s ive g r een r o o f ex t en s ive g r een r o o f n o t po s s ibl e

Green Roof: Architectural Design

Sedum Planting Layer

6” Roof Lite Extensive MC

Root Barrier

Hydrotech Gardendrain GR 30

[Gardendrain GR 30]

EPDM [ Water Proofing Membrane]

Rigid Insulation

Design Rainfall: 1 inch/hour

Stormwater Runoff

Rational Method (Runoff Model)

Typical Roof: 0.95

Lawn (Sandy Soil): 0.10

Green Roof: Drainage

Leader Sizing

Based on Projected Area

& Percentage of Vertical Surface Areas

Does Not consider delayed runoff rate

During sustained storm event rate can reach that of typical roof

Total Drainage Area: 76,425 ft 2

(28) 2 inch Leaders

(14) 3 inch Leaders

Total Drainage Rate: 19 gpm

Green Roof: Construction

Management

Cost Analysis [RS Means Renovation & Maintenance]

Replacement w/ Ballasted EPDM

@ $4.55/ft 2 = $253,000

Replacement w/ Green Roof

@ $6.47/ft 2 = $360,000

Life Cycle [50 year period]

Ballasted EPDM: 3 @ $253,000 =

Extensive Sedum: 1 @ $360,000 =

$759,000

$360,000

Recommendation: Green Roof Installation @ Time of Replacement

Questions ?

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