5/10/2018. Copyright 2018 American Wood Council COURSE DESCRI PTI ON. Design Tools to Simplify IBC Chapter 5 (BCD425)

Size: px

Start display at page:

Dina Norton
6 years ago
Views:

CHOOSING CONSTRUCTION TYPE JUST GOT EASIER: Design Tools to Simplify IBC Chapter 5 (BCD425) Paul Coats, PE, CBO Southeast Regional Manager American Wood Council Ricky McLain, PE, SE Senior Technical

It also can be one of the most daunting code analysis steps but it doesn t have to be!

1 CHOOSING CONSTRUCTION TYPE JUST GOT EASIER: Design Tools to Simplify IBC Chapter 5 (BCD425) Paul Coats, PE, CBO Southeast Regional Manager American Wood Council Ricky McLain, PE, SE Senior Technical Director WoodWorks 1 COURSE DESCRI PTI ON Determining the allowable building code construction type for a building s occupancy and size is fundamental to proper design. It also can be one of the most daunting code analysis steps but it doesn t have to be! Through a combination of building code highlights, examples, and resources, this presentation will focus on practical approaches that make determining construction type and associated allowable heights and areas, considerably easier. Topics will include building size and height alternatives in the 2015 International Building Code and an introduction to free calculators and other resources that speed and simplify the process. Code requirements for fire safety during construction will also be reviewed. 2 1

2 LEARNING OBJECTIVES Upon completion, participants will be better able to: Recognize construction types, occupancies, and determine building heights and areas for wood-frame low- and mid-rise construction per the 2015 International Building Code. 1 3 Discuss allowable building size calculators and review their capabilities in analyzing single- and multi-occupancy buildings. 2 4 Describe Code Conforming Wood Design, and highlight its use as a resource for designers when analyzing single-occupancy structures. Discuss the special provisions of International Building Code Section 510 and give examples of their applications in common building configurations. 33 POLLING QUESTION 1. What is your profession? a) Architect b) Engineer c) Code Official d) Builder/Product Manufacturer e) Other 4 2

3 Introduction Background on IBC Requirements Examples: H&A Calculator Section 510 Construction Fire Safety Q&A Outline 5 BACKGROUND - IBC REQUIREMENTS 6 3

4 BACKGROUND - IBC REQUIREMENTS 7 BACKGROUND - IBC REQUIREMENTS 8 4

BACKGROUND - IBC REQUIREMENTS 9 ALLOWABLE BUILDING AREA SINGLE OCCUPANCY, ONE-STORY BUILDINGS (506.2.1) A a = A t + (NS I f ) (Equation 5-1) Where: A a = Allowable building area (square feet).

5 BACKGROUND - IBC REQUIREMENTS 9 ALLOWABLE BUILDING AREA SINGLE OCCUPANCY, ONE-STORY BUILDINGS ( ) A a = A t + (NS I f ) (Equation 5-1) Where: A a = Allowable building area (square feet). A t =Tabular building area factor (NS, S1, or S13R value, as applicable) in accordance with Table (square feet). NS =Tabular allowable area factor in accordance with Table for a nonsprinklered building (regardless of whether the building is sprinklered). I f = Area factor increase due to frontage (percent) as calculated in accordance with Section

6 ALLOWABLE BUILDING AREA SINGLE OCCUPANCY, MULTI-STORY BUILDINGS ( ) A a = [A t + (NS I f )] S a (Equation 5-2) Where: A a = Allowable building area (square feet). A t =Tabular building area factor (NS, S13R, or SM value, as applicable)in accordance with Table (square feet). NS =Tabular allowable area factor in accordance with Table for a nonsprinklered building (regardless of whether the building is sprinklered). I f = Area factor increase due to frontage (percent) as calculated in accordance with Section S a = Actual number of building stories above grade plane, not to exceed three. For buildings equipped throughout with an automatic sprinkler system installed in accordance with Section (NFPA 13R system), use the actual number of building stories above grade plane, not to exceed four. 11 AREA FACTOR INCREASES FOR FRONTAGE (506.3) I f = [F / P 0.25] W / 30 (Equation 5-5) Where: I f = Area factor increase due to frontage (percent) as calculated in accordance with Section F = Building perimeter that fronts on a public way or open space having 20 feet open minimum width (feet). P = Perimeter of entire building (feet). W = Width of public way or open space (feet) in accordance with Section

lot line 5/10/2018 WEIGHTED AVERAGE (506.3.2) W = (L 1 x w 1 + L 2 w 2 + L 3 w 3 ) / F (Equation 5-4) Where: L n = Length of a portion of the exterior perimeter wall (feet).

7 lot line 5/10/2018 WEIGHTED AVERAGE ( ) W = (L 1 x w 1 + L 2 w 2 + L 3 w 3 ) / F (Equation 5-4) Where: L n = Length of a portion of the exterior perimeter wall (feet). w n = Width of open space (> 20 ft.) associated with that portion of the exterior perimeter wall (feet). F = Building perimeter that fronts on a public way or open space having a width of 20 feet or more. W Bldg MIXED OCCUPANCY (508) Mixed occupancy buildings are permitted a total allowable building area calculated in accordance with Section 508. Single-story basement does not need to be included in the total allowable building area when the basement does not exceed the area permitted for a single-story building per Section

MIXED OCCUPANCY (508) Section 508.3 Nonseparated occupancies Section 508.

2 506.2.4 single- and multi-story mixed occupancy buildings 15 POLLING QUESTION 2.

8 MIXED OCCUPANCY (508) Section Nonseparated occupancies Section Separated occupancies Sections single- and multi-story mixed occupancy buildings 15 POLLING QUESTION 2. Under what condition(s) do basements contribute to allowable building size? a) If not protected with sprinklers b) If exits are through the story above c) If exceeds the allowable for a single story building d) All of the above 16 8

CODE CONFORMING WOOD DESIGN http://www.awc.

9 CODE CONFORMING WOOD DESIGN 17 CLASSIFICATIONS Group A, Assembly occupancies Group B, Business occupancies Group E, Educational occupancies Group F, Factory/Industrial occupancies Group I, Institutional occupancies Group M, Mercantile occupancies Group R, Residential occupancies Group S, Storage occupancies More in IBC 18 9

10 EXAMPLE SPRINKLERED GROUP B Given: One-story Type VB Business provided with an NFPA 13-compliant automatic sprinkler system throughout and located on lot as shown. Building height is 15 Determine: Maximum allowable building area EXAMPLE SPRINKLERED GROUP B (CCWD P. 36) Actual area = = 25,000 square feet OK 20 10

11 EXAMPLE GROUP B (UNSPRINKLERED) Given: One-story Type VB Business (unsprinklered) located on lot as shown. Building height is 15. Determine: Maximum allowable building area EXAMPLE GROUP B (UNSPRINKLERED) (CCWD P. 35) Actual area = = 25,000 square feet NG 22 11

12 EXAMPLE SPRINKLERED GROUP B Given: One-story Type VB Business provided with an NFPA 13-compliant automatic sprinkler system throughout and located on lot as shown. Building height is 15 Determine: Maximum allowable building area BACKGROUND IBC REQUIREMENTS I f = [F/P 0.25] W / 30 (Equation 5-5) I f = [F350/ ] 30 / 30 (Equation 5-5) I f = 0.25 A a = A t + (NS I f ) (Equation 5-1) A a = 36,000 + (9, ) (Equation 5-1) A a = 38,

13 Introduction Background on IBC Requirements Examples: H&A Calculator Section 510 Construction Fire Safety Q&A Outline 25 WOODWORKS/AWC H&A CALCULATOR APP - FREE 26 13

14 WOODWORKS/AWC H&A CALCULATOR APP - FREE 27 WOODWORKS/AWC H&A CALCULATOR APP 2 Analysis Modes: Basic Advanced 28 14

WOODWORKS/AWC H&A CALCULATOR APP Basic Analysis Mode: Single Occupancy Up to 6 stories For multi-story buildings, assumes all floors same area, sim.

15 WOODWORKS/AWC H&A CALCULATOR APP Basic Analysis Mode: Single Occupancy Up to 6 stories For multi-story buildings, assumes all floors same area, sim. to CCWD You enter code edition, building size/height and sprinkler, calculator provides construction type options 29 WOODWORKS/AWC H&A CALCULATOR APP Given: One-story Type VB Business Provided with an NFPA 13-compliant automatic sprinkler system throughout and located on lot as shown. Building height is 15 Determine: Viable Construction Types

16 WOODWORKS/AWC H&A CALCULATOR APP Basic Analysis Single Story Example: 2015 IBC NFPA 13 Sprinkler System 1 stories, 15 ft B Occupancy 25,000 SF Input Frontages Select Calculate 31 WOODWORKS/AWC H&A CALCULATOR APP 32 16

17 WOODWORKS/AWC H&A CALCULATOR APP 33 WOODWORKS/AWC H&A CALCULATOR APP 34 17

18 WOODWORKS/AWC H&A CALCULATOR APP Basic Analysis Single Story Example: Same as before but no sprinkler system 35 WOODWORKS/AWC H&A CALCULATOR APP 36 18

IBC NFPA 13 Sprinkler System 4 stories, 44 ft R-2

19 WOODWORKS/AWC H&A CALCULATOR APP 37 WOODWORKS/AWC H&A CALCULATOR APP Basic Analysis Multi-Story Example: 2012 IBC NFPA 13 Sprinkler System 4 stories, 44 ft R-2 Occupancy 24,000 SF per floor No Frontage Increase Select Calculate 38 19

20 WOODWORKS/AWC H&A CALCULATOR APP Basic Analysis Example: Construction type options Listed top down from highest to lowest Select Type VA Construction 39 WOODWORKS/AWC H&A CALCULATOR APP 40 20

21 WOODWORKS/AWC H&A CALCULATOR APP 41 WOODWORKS/AWC H&A CALCULATOR APP Advanced Analysis Mode: Allows multiple occupancies on each floor Assumes separated occupancies You select a construction type, calculator checks it, offers alternatives if applicable 42 21

4 Level 4 Occupancy 1 Level 3 Level 2 Level 1 Occ 3 Occ 3 Occupancy 1 Occupancy 1Occ 4 Occupancy 1 Elevation view Occupancy 4 Occupancy 2

22 MULTI-STORY MIXED-USE BUILDING EXAMPLE I M A G E C R E D I T : C U B E 3 S T U D I O L L C & R I X O N P H O T O G R A P H Y 43 MULTI-STORY SEPARATED OCCUPANCY BUILDINGS IBC Level 4 Occupancy 1 Level 3 Level 2 Level 1 Occ 3 Occ 3 Occupancy 1 Occupancy 1Occ 4 Occupancy 1 Elevation view Occupancy 4 Occupancy 2 Sum of ratios of actual area/allowable area for all occupancies per floor: Separation Per Table ALSO BTWN OCC. 1 & for 1 story building 2.0 for 2 story building 3.0 for 3 or more story building No floor can have a ratio >

MULTI-STORY SEPARATED OCCUPANCY BUILDINGS IBC 508.

23 MULTI-STORY SEPARATED OCCUPANCY BUILDINGS IBC Level 4 Level 3 Level 2 Level 1 Multi-Story Separated Occupancy Example Occupancy 1 Occ 3 Occ 3 Occupancy 1 Occupancy 1 Occupancy 4 Occupancy 1 Elevation view Occ 4 Occupancy 2 4 story building Total building area = 120,000 SF Occupancy 1 = apartments (R-2) Occupancy 2 = retail (M) Occupancy 3 = restaurant (A-2) Occupancy 4 = professional offices (B) IBC section requires buildings containing group R fire areas to be sprinklered throughout the building Provide NFPA 13 sprinkler throughout building Check first with no frontage increase TRY TYPE VA CONSTRUCTION 45 MULTI-STORY, MIXED-USE EXAMPLE Apartments (R-2) 21,000 sf Level 1 Floor Plan Retail (M) 9,000 sf Apartments (R-2) 17,400 sf Level 2 Floor Plan Restaurant (A-2) 12,600 sf 46 23

MULTI-STORY, MIXED-USE EXAMPLE Apartments (R-2) 15,200 sf Office (B) 2,200 sf Level 3 Floor Plan Restaurant (A-2) 12,600 sf Apartments (R-2) 24,400 sf Office (B) 5,600 sf Level 4 Floor Plan 47

24 MULTI-STORY, MIXED-USE EXAMPLE Apartments (R-2) 15,200 sf Office (B) 2,200 sf Level 3 Floor Plan Restaurant (A-2) 12,600 sf Apartments (R-2) 24,400 sf Office (B) 5,600 sf Level 4 Floor Plan 47 MULTI-STORY, MIXED-USE EXAMPLE Level 4 Level 3 Level 2 Level 1 Occupancy 1 Occ 3 Occ 3 Occupancy 1 Occupancy 1 Occupancy 1 Elevation view Occupancy 4 Occ 4 Occupancy 2 SUM OF RATIOS OF ACTUAL AREA/ALLOWABLE AREA FOR ALL OCCUPANCIES PER FLOOR: = 3.26 > 3.0 INADEQUATE; TYPE VA IS INADEQUATE 48 24

MULTI-STORY, MIXED-USE EXAMPLE Level 4 Level 3 Level 2 Level 1 Occupancy 1 Occ 3 Occ 3 Occupancy 1 Occupancy 1 Occupancy 4 Occupancy 1 Elevation view Occ 4

0 INADEQUATE; TYPE VA IS INADEQUATE 49 MULTI-STORY, MIXED-USE EXAMPLE Level 4 Level 3 Level 2 Level 1 Occupancy 1 Occ 3 Occ 3 Occupancy 1 Occupancy 1 Occupancy

25 MULTI-STORY, MIXED-USE EXAMPLE Level 4 Level 3 Level 2 Level 1 Occupancy 1 Occ 3 Occ 3 Occupancy 1 Occupancy 1 Occupancy 4 Occupancy 1 Elevation view Occ 4 Occupancy 2 SUM OF RATIOS OF ACTUAL AREA/ALLOWABLE AREA FOR ALL OCCUPANCIES PER FLOOR: = 3.26 > 3.0 INADEQUATE; TYPE VA IS INADEQUATE 49 MULTI-STORY, MIXED-USE EXAMPLE Level 4 Level 3 Level 2 Level 1 Occupancy 1 Occ 3 Occ 3 Occupancy 1 Occupancy 1 Occupancy 1 Elevation view Occupancy 4 Occ 4 Occupancy 2 TRY TYPE IIIB SUM OF RATIOS OF ACTUAL AREA/ALLOWABLE AREA FOR ALL OCCUPANCIES PER FLOOR: = 2.89 < 3.0 TYPE IIIB IS ADEQUATE 50 25

POLLING QUESTION 3. In multi-story, mixed occupancy buildings, the sum of ratios of actual area/allowable area for any given floor cannot exceed: a) 1.

26 POLLING QUESTION 3. In multi-story, mixed occupancy buildings, the sum of ratios of actual area/allowable area for any given floor cannot exceed: a) 1.0 b) 2.0 c) 3.0 d) The number of stories 51 MULTI-STORY, MIXED-USE EXAMPLE LOT LINE CALCULATE FRONTAGE INCREASE FACTOR 52 26

MULTI-STORY, MIXED-USE EXAMPLE 10 200 55 28 150 150 200 35 80 USING

LOT LINE 53 MULTI-STORY, MIXED-USE EXAMPLE 10 200 55 28 150 150 200 35

27 MULTI-STORY, MIXED-USE EXAMPLE USING MULTI -STORY, MIXED-USE EXAMPLE, S EE I F TYPE VA IS ADEQUATE W/FRONTAGE LOT LINE 53 MULTI-STORY, MIXED-USE EXAMPLE F RONTAGE AREA I NCREASE F ACTOR = TYPE VA IS ADEQUATE W/FRONTAGE 54 27

28 MULTI-STORY, MIXED-USE EXAMPLE WOODWORKS/AWC H&A CALCULATOR APP 56 28

29 WOODWORKS/AWC H&A CALCULATOR APP

30 HEIGHTS AND AREAS CALCULATOR FREE TOOL H T T P : / / W W W. W O O D W O R K S. O R G / D E S I G N - A N D - T O O L S / D E S I G N - T O O L S / O N L I N E - C A L C U L A T O R S / 59 Introduction Background on IBC Requirements Examples: H&A Calculator Section 510 Construction Fire Safety Q&A Outline 60 30

SPECIAL PROVISIONS IBC 510 P H O T O C R E D I T : A R D E N P H O T O G R A P H Y CONSTRUCTI ON TYPES IBC 602.

IBC SECTION 510 CONTAINS SPECIAL PROVISIONS THAT IN SOME CASES, ALLOW MULTIPLE CONSTRUCTION TYPES IN THE SAME BUILDING OR MULTIPLE BUILDINGS STACKED ON TOP OF EACH OTHER 61

31 SPECIAL PROVISIONS IBC 510 P H O T O C R E D I T : A R D E N P H O T O G R A P H Y CONSTRUCTI ON TYPES IBC REQUIRES THAT EACH BUILDING BE CLASSIFIED AS ONE OF FIVE CONSTRUCTION TYPES. IBC SECTION 510 CONTAINS SPECIAL PROVISIONS THAT IN SOME CASES, ALLOW MULTIPLE CONSTRUCTION TYPES IN THE SAME BUILDING OR MULTIPLE BUILDINGS STACKED ON TOP OF EACH OTHER 61 SPECIAL PROVISIONS IBC Horizontal building separation Often called podium provision: Considered separate buildings above and below for purposes of area calculations if: Overall height in feet is still limited to min of either building 3hr rated horizontal assembly Building below is Type 1A with sprinklers Occupancy restrictions above and below 62 31

Type IA 5/10/2018 SPECIAL PROVISIONS IBC 510.

INCREASES ALLOWABLE STORIES NOT ALLOWABLE BUILDING HEIGHT Type IA 5

32 Type IA 5/10/2018 SPECIAL PROVISIONS IBC HORIZONTAL BUILDING SEPARATION 3Hr 5 story Type III Building INCREASES ALLOWABLE STORIES NOT ALLOWABLE BUILDING HEIGHT Type IA 5 story Type III Building On Top of a Type IA Podium 63 SPECIAL PROVISIONS IBC Hr IBC Provisions for Mixed-Use podium have been evolving IBC Section Upper Occupancy Lower Occupancy Podium Height S-2 Parking A, B, M, R or S A, B, M, R or S-2 Parking Any Except H 1 Story No Restriction 2015 IBC HAS NO LIMIT ON # OF PODIUM STORIES 64 32

This doesn t mean that it has to be a type IA podium, can use these materials in any construction type (IBC 602.1.

33 BUILDING CONFIGURATION OPTIONS Mixed-use occupancies on 1 st floor of residential buildings often require longer spans for open areas (parking, retail, assembly). Some designers choose steel or concrete for these longer spans. This doesn t mean that it has to be a type IA podium, can use these materials in any construction type (IBC ) 65 SPECIAL PROVISIONS IBC PARKING BENEATH GROUP R UNIQUE APPLICATION SIMILAR TO PODIUM PROVISION BUT MORE FLEXIBILITY 66 33

(in feet) measured from grade plane Floor separating parking & group R: Same construction type as parking Hourly rating per table 508.

34 SPECIAL PROVISIONS IBC Parking beneath group R Single story above grade, S-2 parking: Type I (enclosed or open) or Type IV (open) Group R occupancy above # of stories measured from floor above parking Height (in feet) measured from grade plane Floor separating parking & group R: Same construction type as parking Hourly rating per table SPECIAL PROVISIONS IBC Open Parking beneath group A, I, B, M or R Allows mix of construction types without need for podium: Parking level(s) must be type I, II or IV Upper portion: # of stories & height measured from grade plane Floor separating parking & upper occupancies: Hourly rating per table Example: 4 story building: type IIB parking on lowest level, 3 stories of type VA above 68 34

2) 4 Stories of type VA over 1 story type IV (open) or type I (IBC 510.

35 BUILDING CONFIGURATION OPTIONS Example: 5 story building 1st floor: parking 2nd-5th floors residential Image Credit: Stratos Options: 4-story, type VA over 1 story type IA (podium provision IBC 510.2) 4 Stories of type VA over 1 story type IV (open) or type I (IBC 510.4) no podium req d 5 stories of type III (enclosed parking only) sep. or non-sep. occupancies

36 POLLING QUESTION 4. Under Section of the 2015 IBC, how many stories can a building below a podium be? a) 1 story b) 2 stories c) 3 stories d) No limit is given 71 Introduction Background on IBC Requirements Examples: H&A via Tables and Calculator Resources Section 510 Construction Fire Safety Q&A Outline 72 36

PRECAUTIONS DURING CONSTRUCTION 73 PRECAUTIONS DURING CONSTRUCTION

and 3312) Requirements for a fire watch, a fire protection

work and roofing requirements (3304, Chapter 35, and 3317) Fire

37 PRECAUTIONS DURING CONSTRUCTION 73 PRECAUTIONS DURING CONSTRUCTION IBC/IFC Chapters 33: Fire-fighting vehicle access and water supply (3310 and 3312) Requirements for a fire watch, a fire protection superintendent, and prevention program (3304 and 3308) Extensive hot work and roofing requirements (3304, Chapter 35, and 3317) Fire extinguishers (3309) Standpipes (3311) Temporary heating equipment (3303) Emergency phones (3309) 74 37

CONSTRUCTION FIRE SAFETY COALITION http://www.constructionfiresafety.org/ 75 info@awc.

org T h i s p r e s e n t a t i o n i s p r o t e c t e d b y U S a n d I n t e r n a t i o n a l C o p y r i g h t l a w s.

38 CONSTRUCTION FIRE SAFETY COALITION T h i s p r e s e n t a t i o n i s p r o t e c t e d b y U S a n d I n t e r n a t i o n a l C o p y r i g h t l a w s. R e p r o d u c t i o n, d i s t r i b u t i o n, d i s p l a y a n d u s e o f t h e p r e s e n t a t i o n w i t h o u t w r i t t e n p e r m i s s i o n o f A m e r i c a n W o o d C o u n c i l ( A W C ) i s p r o h i b i t e d. A m e r i c a n W o o d C o u n c i l

California Building Code

Height and Area Provisions in the California Building Code Dennis Richardson, P.E., C.B.O., CASp Western Coast Manager American Wood Council The Wood Products Council is a Registered Provider with The