Massive but Lean: How Design + Construction Efficiency Led One Mass Timber Project to Success

Transcription

1 Massive but Lean: How Design + Construction Efficiency Led One Mass Timber Project to Success Presented by: W illiam Silva Disclaimer: This presentation was developed by a third party and is not funded by WoodWorks or the Softwood Lumber Board.

2 The Wood Products Council is a Registered Provider with The American Institute of Architects Continuing Education Systems (AIA/CES), Provider #G516. Credit(s) earned on completion of this course will be reported to AIA CES for AIA members. Certificates of Completion for both AIA members and non-aia members are available upon request. This course is registered with AIA CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.

3 Course Description This case study presentation offers a rare opportunity to learn about mass timber from a company that built one of the largest cross-laminated timber (CLT) projects in the US a five-story, 156,000-square-foot office building in Hillsboro, Oregon. Swinerton Builders, which undertook all aspects of construction in-house, will share information on procurement and erection not easily found through other sources. Insights will cover preconstruction activities, including design optimization, proper use of BIM to manage the many prefabricated elements inherent in a large mass timber project, and phasing techniques. Site logistics, quality management, field production, and erection details will also be discussed.

4 Learning Objectives 1. Discuss the design team-manufacturer-contractor interaction required in order to see a mass timber project to successful fruition. 2. Review mass timber detailing techniques that can result in efficient erection and optimized use of materials. 3. Highlight the need for and proper implementation of building information modeling in a large-scale mass timber project. 4. Demonstrate effective means of construction administration and quality control the contractor implemented on the largest CLT structure in the US.

5 Swinerton Core Markets & Locations

6 First Tech Federal Credit Union Hillsboro, Oregon Image Source: Hacker Architects 156,000 Square Feet Largest CLT project constructed in U.S. 14 Month Overall Construction Schedule 15-week erection; 12-weeks Mass Timber

7 Sustainability Scorecard First Tech Federal Credit Union Project Summary Carbon Stored in Wood: 4,192 Metric Tons Avoided Greenhouse Gas: 1,622 Metric Tons Equivalent to Removing 1,229 Cars for a Year Time for Oregon to regrow wood used: 46 Min. Photo Source: Oregon Forest Resource Institute

8 THE NEXT LEVEL Old is New Again: The Master Builder

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11 COST & VALUE Cost 5% Savings to 10% Premium Mass Timber Structure Typically Cost More Holistic View of Cost Yields Savings Site Specific and Supplier Variables Understood Total Cost = Indirect Cost + Direct Cost What is the Value? = (89:;<=>:?@AB<CA<=;B) E>B<

12 LEVERAGING STRENGTH Optimization and Understanding to Deliver Higher Value

13 Understanding that Not All Mass Timber is the Same Photo Source: Structurlam

14 Optimizing Structural Bays Perimeter Beam Not Required 5-ply (139) CLT 12 Bays 5-ply (139) CLT

15 Beam-to-Column Connection

16 Optimized Connections Timber Engineering Image Source: MyTiCon

17 Precision for Aesthetic and Protection Photo Source: Structurlam

18 CLT Horizontal Diaphragm

19 Lighter Structural System

20 Simplified Edge Condition

21 Implications of the Supply Chain NORTH AMERICA [First Tech] 1. Manufacture 2. Trucking 3. Hook * Replacement: 48 hours EUROPE [Viega] 1. Manufacture 2. Trucking 3. Shipping Container 4. Rail 5. Truck 6. Warehouse / Site 7. Hook * Replacement: 8 weeks

22 MASS TIMBER CAPABILITY Virtual Design & Construction (VD&C) To Execution

23 Pre-Engineered / Pre-Installed Connections Photo Source: Structurlam

24 Prefabricated Mass Timber Design & Supply Image Source: Equilibrium Consulting Image Source: Structurlam Design for Cost, Manufacture & Assembly Integrated Model Simplified Installation

25 Timber-to-Steel Coordination

26 Building Information Modeling (BIM) for Fabrication Design-Build Trade Partners for Enhanced Systems BIM for Fabrication of all Structural and MEPF Systems Preplanning for Maximum Prefabrication

27 Pre-Drilled & Pre-Cut Penetrations

28 Building Information Modeling (BIM) for Fabrication Prefabrication Install Process: 1. Coordination & clash detection 2. Confirm layout with model 3. Install prefabricated component Typical Install Process: 1. Coordination & clash detection 2. Create layout drawings 3. Snap Gridlines in the field 4. Mark each hole location 5. Drill each hole 6. Clean up 7. Install prefabricated component

29 Floor-to-Floor Heights

30 SCHEDULE CERTAINTY Thinking Outside of the Box

31 Development of Design for Constructability BIM Detailing for Fabrication Logistics Synchronization Plan for Speed of Construction: 15-Week Erection Starting with Procurement

32 Strategic Project Phasing

33 Just in Time Delivery

34 Safety and Speed

35 A Builder s Decision to Self Perform

36 FIRST TECH FEDERAL CREDIT UNION Post, Beam & CLT Panel 156,000 square foot Office Space Preplanning started at the beginning of design 5 months from contract to first deliveries Project mass timber connection & diaphragm system was NOT designed at time of contract award Prefabrication with 4,200 MEPF penetrations: Reduced cost and schedule risk Improved safety, quality, and accuracy CLT provided best value proposition to client over concrete and steel options 15 weeks installation of the structural frame

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38 Questions? This concludes The American Institute of Architects Continuing Education Systems Course William Silva E wsilva@swinerton.com SWINERTON