WE EXIST TO BUILD GREAT THINGS DPR Construction UCSF Mission Bay Pre-fabrication Effort Presentation for Panelized Systems UCSF Medical Center at Mission

WE EXISTTO BUILDGREATTHING

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DPR ConstructionUCSF Mission BayPre-fabrication Effort

Presentation for

Panelized SystemsUCSF Medical Center at Mission Bay


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Presenters

Steve Spence: DPR General Superintendent

Dan Casale: DPR BIM Engineer– Project Team:– University of California San Francisco– DPR Construction– Anshen & Allen Architects– Cambridge Group


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Project Background

UCSF Mission Bay Campus– Hospital – 650,000 SF – OSHPD 1– Outpatient Building – 250,000 SF – OSHPD

1/3– Energy Center – 20,000 SF

Total Value = $1.68 Billion Target Budget = $1.58 Billion <$100M> UCSF Medical Center at Mission Bay


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Scope of Work

Produce fully coordinated models that can be used to create OSHPD submittals for the Hospital / OPB and EC

Preconstruction Services Only Currently over by $100M and team

needs to address this Use BIM / VDC and Lean Principles


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Pre-Fabrication

Ideas:– Brain-storming

session.• Every idea was

analyzed– Identified

Constraints


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Pre-Fabrication

Ideas That Work– Industry

Standard:• Pre-cut Conduit & MC• Pre-Punch Panels• Pre-fab J-Boxes• Trim for Fixtures• Bathroom Carriers• Pre-Spooled & Jointed

Pipe• Pre-Section Duct• VAV & Attenuator

Sections• Soffit Drops• Box Headers• Headwall Units

Ideas that Don’t Work– Pre-Fab Bathrooms

• Structure Won’t Allow It

– Joint Racking• OSHPD Won’t Allow

It– Pre-Fabbed Electrical

Rooms– Med-Gas Rack

• OSHPD Won’t Allow It


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Pre-Fabrication

Potential Ideas:– Joint Racking for Plumbing & HVAC– Fire-stopping Systems– RE-Bar Cages– Pre-Fabricate Wall Panels


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Drywall/Stud Modeling


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Software

Challenges:– Software Under-

Developed• Automated Openings• Automate Backing• Further Develop

Shop-Drawings• Pre-Fabrication

Benefits:– Much more efficient

than traditional placement.

– Identify King & Corner Stud Clashes

– Identify Constructability Constraints

– Facilitate Pre-fabrication Effort


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Panelized Systems

Prefabrication– Currently performing

feasibility analysis.• What’s the engineering say?• Can it be coordinated?• How many panels must be

pre-fabbed to break even?• How big can they be?• Optimal height?• Schedule Impact?• Where should we target?• Etc…?


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Panelized Systems

Preliminary Research:– Labor Unions– Pre-Fabrication Site– Engineering

Requirements– OSHPD Approval– Machine Proposal

Preliminary Answers:– Labor Unions must work

locally– Pre-fab site subject to

location constraints– Panels can span 8’ and

are stronger than traditional walls

– OSHPD is OK– Custom Machine can be

built


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Panelized Systems

Hybrid system– Individual Panels– Up to 8’ in length– Target 6” above

ceiling– Designed lengths for

“layout framing”– Complete with

• Backing• In-wall MEP• Top & bottom track


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Panelized Systems

In-fill– Traditional “stick

framing”– King studs, infill

above 9’6”


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Installation Process

Process:1. Corner, Kong, &

Top Track Placed2. Panels laid in3. In-fill framing

comes behind.4. Walls inspected

and closed.


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Alternate Installation Process

Process:1. Corner, Kong, &

Top Track Placed2. In-fill framing.3. Panels laid in4. Walls inspected

and closed.


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Target Areas

Identify Repetitive Areas of the Floor Plan

Same Rooms= Repeating Panels

10 Different Panels Used 100x’s

Vs. 100 Panels Used

10x’s


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Floor Plan


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Assembly Drawing

Assembly Drawings Contain:– Individual

Panels– Matched up– Total Wall

Assembly with Infill Framing


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Panelized Systems Combine panels

& infill– Total wall

system– Higher Quality– Shorter

installation schedule


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Panelized Systems


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Panelized Systems


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Challenges Models for 3-6 have already been created and coordinated.

– 30,000SF every 20 days. Pre-fabrication was not addressed during these phases

– Critical studs occur every 4’ in most patient rooms Schedule Impact

– What is the schedule impact? Are we more efficient? What are the productivity rates?

Engineering– Do panels have to match infill above?– How far can we span?


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Advantages

Quality Control Productivity Rate Productivity Tracking Waste Reduction Schedule Benefits = Cost Benefits


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What’s Next

Currently Modeling Critical Studs Prior to Coordination

Subs should be able to coordinate around studs supporting panels.

To

Documents

WE EXIST TO BUILD GREAT THINGS DPR Construction UCSF Mission Bay Pre-fabrication Effort Presentation for Panelized Systems UCSF Medical Center at Mission