WORKSHOP Progressive Multi- Family Design: New Opportunities for Light Frame Mid-Rise Structures

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1 WORKSHOP Progressive Multi- Family Design: New Opportunities for Light Frame Mid-Rise Structures February 14 16, 2017 San Diego, Long Beach, San Francisco

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 CESfor 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 Workshop Description Updates to the California Building Code along with the availability of innovative new products have created opportunities for designers to add value to their mixed-use and multi-family projects by increasing scale and improving aesthetics. This workshop will introduce a new code allowance for additional stories in podium structures and review specific ways it can impact building designs. Referencing built projects and common design techniques, discussion will cover fire-rated detailing provisions, including those relevant to the detailing of wood shaft walls, and options for cost-effectively integrating mass timber into projects that are otherwise light wood-frame. Code provisions related to safety during construction will also be reviewed to demonstrate how to minimize the risk of fire on large wood projects.

4 Learning Objectives 1. Determine the design Challenges and solutions using a multi-story podium under four and five stories of wood-frame construction, using references to built examples 2. Discuss opportunities and requirements for wood shaft wall designs, including detailing options, cost benefits and relevant code provisions. 3. Investigate opportunities for combining wood-frame and mass timber solutions in multi-family mid-rise applications in order to take advantage of the aesthetics and speed of mass timber while deriving the economic benefits of wood-frame 4. Review 2015 IBC Chapter 33 provisions regarding construction safety that can minimize on-site risk of construction fires on large wood projects.

5 Design Considerations for Multi-story Podium Projects Presented by Tim Smith Togawa Smith Martin, Inc. Disclaimer: This presentation was developed by a third party and is not funded by WoodWorks or the Softwood Lumber Board.

6 What is Wood Mid-Rise Construction?

7 Before 1990: 4 Stories and 50 Foot Maximum Height & 60 Units/Acre

8 Starting 2017: 8 Stories and 85 Foot Maximum Height & Units/Acre

9 History of Mid-Rise Construction

10 1989 California Building Code Type III Construction 5 Stories: 65 feet high

11 Typical Type III Construction

12 Casa Heiwa Los Angeles, CA First 5 Story Wood Frame Building in California The Beginning of Type III Construction

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14 1994: 6 Stories and 65 Feet High; 100 Units/Acre

15 Wood Mid-Rise Enters the Urban Cores

16 Social Change From the Suburbs to the Urban Cores

17 Housing Dream of Baby Boomers

18 Urban European Planning Social Change to Living in the Urban Cores Gen X and Millennials have Arrived

19 5 Story Over Retail ( Units/Acre)

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21 2007: Adoption of International Building Code 5 Stories over 85 Foot High Podium

22 Mezzanine: 75 feet High 5 Stories Type III Type I Podium with Residential 7 Levels of Residential ( Units/Acre)

23 2008: Alternate Means & Methods Double Podium

24 7 Stories Plus Wood Mezzanine ( Units/Acre)

25 7 Stories Plus Concrete Mezzanine ( Units/Acre)

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27 2016: California Building Code 85 Foot High, 8 Stories (with Multiple Podiums)

28 8 Stories with 3 level podium ( units/acre)

29 Wrap Product Type 5 Story 6 Stories with Mezzanine 8 Story

30 5 Stories of Residential Concrete Freestanding Garage 5 Story Wrap, Units/Acre, Less Expensive to Build

31 6 Levels Plus Mezzanine, 75 High

32 8 Stories with Triple Podium (117 Units/Acre)

33 Density Summary (For Urban Projects) 5 story wrap & 4 story podium units/acre 6 story wrap units/acre 7 story wrap units/acre 8 story wrap units/acre 5 story with retail podium units/acre 5 story + residential podium units/acre 5 story with mezzanine + residential podium units/acre 5 story with mezzanine + double residential podium units/acre 5 story with triple podium units/acre

34 Building Code Requirements for 85 Foot High, 8 Story Building

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37 2013 CBC Type IIIA Table High Table Stories 2016 CBC Type IIIA Table High Table Stories

38 Mezzanine is not a floor if it is open to the floor below and does not exceed the floor area by 1/ CBC Type IIIA Table High Table Stories Mezzanine Section CBC Type IIIA Table High Table Stories Mezzanine Section 505.2

39 2013 Type IIIA Basic Code Height Table 5B Sprinkler Increase Section 506 Mezzanine Section 507 Podium Section Separate Buildings for Area & Stories Podium is Only One Story Podium Type I Construction 2017 Type IIIA Basic Code Height Table 503 Sprinkler Increase Section 504 Mezzanine Section 505 Podium Section Separate Buildings for Area & Stories Unlimited Number of Stories for Podium Podium Type I Construction

40 1) 3-hour separation Separate Building for Purposes of Area, Continuity of Fire Walls and Stories

41 1) 3-hour separation 2) Building under horizontal separation is Type IA construction and sprinklered Separate Building for Purposes of Area, Continuity of Fire Walls and Stories

42 1) 3-hour separation 2) Building under horizontal separation is Type IA construction and sprinklered 3) Use below podium can be any uses other than Group H Occupancy Separate Building for Purposes of Area, Continuity of Fire Walls and Stories

43 4) Uses above podium can be Assembly use (less than 300 occupancy), Office, Retail, Residential or Storage 1) 3-hour separation 2) Building under horizontal separation is Type IA construction and sprinklered 3) Use below podium can be any uses other than Group H Occupancy Separate Building for Purposes of Area, Continuity of Fire Walls and Stories

44 5) Total height is based on type of construction with lower maximum building height 4) Uses above podium can be Assembly use (less than 300 occupancy), Office, Retail, Residential or Storage 1) 3-hour separation 2) Building under horizontal separation is Type IA construction and sprinklered 3) Use below podium can be any uses other than Group H Occupancy Separate Building for Purposes of Area, Continuity of Fire Walls and Stories

45 Fire Department Access is 75 Feet to Floor Level

46 Units/Ac Units/Ac Units/Ac Examples of Where We are Headed

47 Building Code Requirements For Type III-A vs. Type V-A Construction Exterior Bearing Walls Fire Walls

48 Type V and III Construction Type V-A (Type V-1 hour) Type of construction in which the structural elements, exterior walls and interior walls are of any materials permitted by CBC. Structural Frame 1 Hr Exterior Bearing Walls 1 Hr Exterior Non-Bearing Depends of distance to PL Interior Bearing Walls 1 Hr Interior Non-Bearing 0 Floor Construction 1 Hr Roof Construction 1 Hr Shafts 2 Hr when 4 stories or more Fire Walls 2 Hr Type III-A (Type III-1 hour) Type of construction in which the exterior walls are of non-combustible materialsand the interior building elements are of any materials permitted by CBC. Structural Frame 1 Hr Exterior Bearing Walls 2 Hr Exterior Non-Bearing Depends of distance to PL Interior Bearing Walls 1 Hr Interior Non-Bearing 0 Floor Construction 1 Hr Roof Construction 1 Hr Shafts 2 Hr when 4 stories or more Fire Walls 3 Hr Fire-retardant wood framing complying with Section shall be permitted within exterior wall assemblies of a 2- hour rating or less.* * All hardware to be galvanized or hot dipped.

49 Other Alternatives: Fire Protection Frame to demising walls rather than exterior walls. At last exterior walls frame to beams/columns.

50 2-hour Bearing Walls 1-hour Non- Bearing Walls

51 Firewall Modification for Diaphragm Continuing through the Firewall

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54 Technical Requirements Shrinkage Shear Walls MPE Coordination Stud Spacing Waterproofing Façade Access

55 Shrinkage occurs primarily in horizontal members such as wall plates and floor joists Zone of Shrinkage

56 Detail 1 -Type III Framing Hang Joist No Scale A B C Floor Joist

57 Exterior Plywood Shear Walls

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59 Tie Rods & Compression Studs at Shear Panels

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61 Separate Shear Walls & Plumbing Walls

62 Vent Penetrations in Shear Walls

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64 2x at 16 o.c. 2x at 12 o.c. Double 2x at 12 o.c. Triple 2x at 12 o.c.

65 Waterproofing

66 Attention to Detail

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72 Alignment of Columns & Slab Edge Grid with Columns Parking Grid Below

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74 Open Space Trends Podium Projects Wrap Projects

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78 Open Space at Roof Open Space at Podium

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80 Multiple 750 S.F. Open Spaces

81 Multiple 750 S.F. Open Spaces

82 Wrap with Open Space on Grade

83 Seven Stories Generates More Open Space

84 Wrap with Open Space on Garages

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87 Open Space on Full Garage Level

88 Open Space on Full Garage Level

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92 QUESTIONS? This concludes The American Institute of Architects Continuing Education Systems Course Tim Smith Togawa Smith Martin, Inc. 444 S Flower Street, Suite 1220 Los Angeles, CA tsmith@tsminc.com (213)