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Web: WWW.BRBCODEEDUCATORS.COM

Joe Belcher, CBO, President Joe@JDBCodeServices.com (352) 450-2631 (813) 925-4152 Fax

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Contact Hours: 1 hour (1 CEH) Title: FBCB Building/Structural Summary Nos.: CILB 0609364 Instructor: Joe Belcher Date 2-11, 2012 Location: Port St. Lucie, FL

2010 Florida Building Code, Building With Supplements/Structural Summary

In General

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Building/Structural Summary This Summary of the 2010 Florida Building Code,

Building, provides an overview of changes from the 2007 Florida Building Code. The changes reflect changes in the base code and Florida Specific Amendments : The 2009 International Building Code is the base code for

the Florida Building Code, Building. The 2009 International Residential Code is the base

code Florida Building Code, Residential.

2010 FBCB

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Building/Structural Summary Chapter 1 of the Florida Building Code,

Building, is the administrative chapter for all volumes of the FBC.

Chapter 1 of the Residential, Mechanical, Plumbing, Existing Building, and Gas volumes of the FBC refer to Chapter 1, Administration, of the Florida Building Code, Building, to govern the administration and enforcement.

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Building/Structural Summary Chapters 11 and 13 converted to

separate volumes of the Florida Building Code, Building,

Chapter 11 refers to the 2012 Florida Accessibility Code

Chapter 13 refers to the Florida Building Code, Energy Conservation

2010 FBCB

Chapter 1: Conflicts

FBCB 102.1 Mod 3456: AAF Opposed. Would have required application of most

stringent provisions between general versus specific requirements. Submitted as an effort to overturn the Dec Statement in which the Commission agreed with the AAF position that electrical receptacles are not required in unconditioned and non-habitable sunrooms (DCA09-DEC-351).

Chapter 1: Administration 102.8 Existing Mechanical

Equipment.

New provision prohibiting jurisdictions from requiring upgrade of the installation of roof mounted equipment until equipment is removed or replaced.

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Chapter 1: Administration 107.3.5 Minimum plan review criteria

for buildings. Adds new items to list for commercial and

residential buildings.

Flood hazard areas.

Impact resistant coverings or systems.

2010 FBCB

Chapter 1: Administration 110.3 Required inspections.

Building 2. Framing Inspections Modified Item 9 eliminating application to required systems only.

Installation of all impact resistant coverings or systems require inspection and permits.

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Fire Resistance R302.1 Exterior Walls – Exception 7 added

R302.1 Exterior walls. Construction, projections, openings and penetrations of exterior walls of dwellings and accessory buildings shall comply with Table R302.1.

Exceptions:

7. Screen enclosure walls of insect screening with a maximum of 25% solid flexible finishes.

Fire Resistance R302.3 Two-family dwellings - Exception 3 added.

R302.3 Two-family dwellings. Dwelling units in two-family dwellings shall be separated from each other by wall and/or floor assemblies having not less than a 1-hour fire-resistance rating when tested in accordance with ASTM E 119 or UL 263. Fire-resistance-rated floor-ceiling and wall assemblies shall extend to and be tight against the exterior wall, and wall assemblies shall extend from the foundation to the underside of the roof sheathing.

3. Screen enclosure walls of insect screening with a maximum of 25% solid flexible finishes.

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CHAPTER 20: LIGHT METAL ALLOYS FBCB 2002 STRUCTURAL ALUMINUM

Reduces design load downward for purlins from 300 lb. to 200 lb.

Clarifies application of categories of sunrooms in AAMA 2100.

Modifies AMAA 2100 to delete reference to ASCE 7-98 and add reference to FBCB §1609.1.1 for determining wind loads for sunrooms.

Update Table 2002.4 to ASCE 7-2010.

FBCB 2010

Sunrooms 1202.1 Definition modified

Roof panels changed from structural to solid.

Glass, windows side-hinged and sliding and glass doors added to open areas.

Clarifies the Categories are for determination of applicable AAMA 2100 provisions

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CHAPTER 12: Interior Environment

2. A one-story structure added to a dwelling with structural solid roof panels without sloped glazing. The sunroom walls may have any configuration, provided the open area areas with operable or fixed glass or windows or side hinged or sliding glass doors of the longer wall and one additional wall is equal to at least 65 percent of the area below 6 foot 8 inches of each wall, measured from the floor. For the purposes of this code the term sunroom as used herein shall include conservatories, sunspaces, solariums, and porch or patio covers or enclosures

FBCB 2010

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CHAPTER 14: EXTERIOR WALLS

1404.9 Vinyl siding and soffit. (FSA)

Adds soffit to section.

1404.9.2 Adds requirement for labeling of manufactured soffit materials and systems.

1404.10 Adds base code language for fiber-cement siding correcting the type material to Type A.

2010 FBCB/ Base Code

Opening Protection Add language establishing the

enclosure of an exterior balcony or porch by screen or vinyl or acrylic windbreaks does not create a sunroom or trigger opening protection requirements for the screen, windbreak, or glazing separating balcony from interior.

AAF Guide/Windbreaks Updates the AAF Guide to the 2010

Edition.

Provide for the adoption of the AAF Guide in the HVHZ when designs sealed.

Added section for windbreaks to HVHZ portion.

WINDS OF CHANGE

ASCE 7-2010

Test Facilities

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98

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ASCE 7-10

Accepted IBC 2012 Accepted as Modified for

FBC 2010 FBC Implementation

March 15th, 2012 23

ASCE 7-10 Significant Changes

Complete reorganization of wind provisions

New wind speed maps

Changes building classification to Risk Category.

Does away with Importance Factors

Changes to wind-borne debris region

Re-introduction of Exposure D for water surfaces in hurricane-prone regions

Introduction of new simplified methods.

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ASCE 7-10 Reorganization of Wind Provisions

ASCE 7-05: Chapter 6 contains all wind provisions

ASCE 7-10: 6 new Chapters (Ch. 26-31) each with flowcharts Intent is to clarify the applicability of the wind provisions Contains provisions for allowable stress design (Vasd ) and

strength design (LRFD) and Ultimate Strength or Load Factor Design (LFD)

Load factors provided for material-based design specifications that adopt a strength design

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ASCE 7-10 Reorganization Wind Provisions

Chapter 26 – General Requirements Scoping Definitions Wind speed maps Exposure Gust factor Topographic factor

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New Wind Data = New Maps Last Wind Speed Change – 1998 ASCE 7-98, 7-02, 7-05

More Data in the last 12 years Previous map used weather data from 208 points New map uses weather data from 2,851 points – 14X

previous data

Development

Interior US ASCE 7-05 wind speeds correspond to 50 year mean recurrence interval (MRI).

Applying 1.6 wind load factor results in wind pressures corresponding with 700 year MRI.

Critical facilities applying Imp Factor of 1.15 and wind load factor of 1.6 results in wind pressure of 1700 year MRI.

(Cont.)

Development Regions where design wind speed controlled by

hurricane events, wind speeds of ASCE 7-05 Figure 6-1 correspond to MRI that varies between 50 and 100 years.

Results in designs with inconsistent levels of reliability across the US.

(Cont.)

Development To provide similar level of reliability across US, a series

of maps used in ASCE 7-2010 showing various structure Risk Categories.

Three separate Basic Wind Speed maps are provided:

(Cont.)

Development 1. Figure 26.5-1A – 700 year MRI – Risk Category II

structures 2. Figure 26.5-1B – 1700 year MRI – Risk Category III and

IV structures 3. Figure 26.5-1C – 300 year MRI – Risk Category I

structures

Figure 26.5-1A Basic Wind Speeds for Occupancy Category II Buildings and Other Structures.

Factors Wind speeds in ASCE 7-05 in large parts

of US at 50 year MRI

Use of 1.6 factor results in 700 year MRI

Use of 1.15 Importance Factor results in 1700 year MRI

Result was inconsistency across US

Factors The wind load factor and importance

factor are now incorporated into the basic wind speed maps. For strength design load combinations maximizing wind effects, the wind load factor is now 1.0. For the corresponding ASD (Vasd) combinations, the wind load factor is 0.6.

Comparisons 7-05 and 7-10 Load factors “built- in” to 7-10 must

be removed

Wind pressures are proportional to wind speed squared

Requires dividing ASCE 7-10 wind speeds by the square root of the wind load factor of 1.6 (1.2649)

Comparisons 7-05 and 7-10 FBCB 2010 provides conversion table

and equation 1609.3.1 Wind speed conversion.

When required, ultimate design wind speeds of Figure 1609A, B and C shall be converted to nominal design wind speeds, Vasd using Table 1609.3.1 or Equation 16-32.

Comparisons 7-05 and 7-10

Comparisons 7-05 and 7-10 Vasd = Vult√0.6 (Equation 16-32) Where: Vasd = nominal design wind speed applicable to methods specified in Exceptions 1 through 5 of Section 1609.1.1 Vult = strength design wind speeds determined from Figures 1609a, 1609b, or 1609c.

ASCE 7-05 and 7-10 Comparison

ASCE 7-10 Wind Speeds (from new data points) Converted back to current ASD Method

ASCE 7-05 Wind Speeds Using current ASD Method

New Methods - for computing capacities

Allowable Stress Design (ASD)

Ultimate Strength or Load Factor Design (LFD)

Load and Resistance Factor Design (LRFD)

Allowable Stress Design (ASD)

50 lb child on swing OK

Swing breaks at 100 lb

divide by a safety factor of 2.0

100 lb / 2.0

= 50 lb is the “Allowable” load

=

Ultimate Load or Load Factor Design (LFD)

50 lb child multiply by a Load (safety) Factor 2.0

50 lb x 2.0 = 100 lb OK

Swing breaks at 100 lb

= 100 lb is the “Ultimate” load

=

Ultimate Load or Load Factor Design (LFD)

80 lb sack of potatoes multiply by a Load (safety) Factor 1.2

80 lb x 1.2 = 100 lb OK

Swing breaks at 100 lb

= 100 lb is the “Ultimate” load

=

ASCE 7-10 New Wind Speed Maps

Strength Design (wind load factor = 1.0) Category II buildings – 700 year return period wind

speed Category III and IV buildings – 1700 year return

period wind speeds Category I buildings – 300 year return period wind

speeds

Serviceability maps (10, 25, 50 and 100 year) to be added to commentary

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Risk Category Three maps Map used to determine basic wind

speed depends on building Risk Category

Risk Category formerly known as Occupancy Category

Table 1604.5 of FBC-B or Table 1.5-1 of ASCE 7-2010

ASCE 7-10 New Wind Speed Maps

Implications Net wind loads are decreasing Windborne debris areas shift

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Wind speeds at selected locations Location 6.1/700V

ASCE 7-05 Exposure C

Exposure C Exposure D Bar Harbor, Maine 97 95 103 Boston, MA 106 103 112 Hyannis, MA 117 112 122 New Port, RI 117 109 119 Southampton, NY 120 110 119 Atlantic City, NJ 114 102 111 Wrightsville Beach, NC 132 119 129 Folly Beach, SC 131 115 125 Miami Beach 145 136 148 Clearwater, FL 128 115 125 Panama City, FL 129 107 116 Biloxi, MS 138 129 140 Galveston, TX 131 119 129 Port Aransas, TX 134 117 127 Hawaii 105 103 112 Guam 170 155 168

FBC Wind Maps Figure 1609A

Figure 1609B

Figure 1609C

Figure R301.2(4)

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HVHZ Basic Wind Speeds Miami-Dade County Risk Cat I Buildings and

Structures: 165 mph

Risk Cat II Buildings and Structures : 175 mph

Risk Cat III and IV Buildings and Structures : 186 mph 64

HVHZ Basic Wind Speeds Broward County Risk Category I Buildings and

Structures: 156 mph Risk Category II Buildings and

Structures: 170 mph Risk Category III and IV Buildings

and Structures: 180 mph

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ASCE 7-10 Reintroduction of Exposure D

Older research and modeling suggested roughness of ocean approached Exposure C with increase in wind speed

Hence ASCE 7-98, -02, and -05 classified water surfaces in hurricane-prone regions as Exposure C

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ASCE 7-10 Reintroduction of Exposure D

New research suggests otherwise

Roughness of ocean does not continue to increase with increasing wind speed.

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ASCE 7-10 Reintroduction of Exposure D

Surface Roughness C: Open terrain with scattered obstructions having heights generally less than 30 ft (9.1 m). This category includes flat open country, and grasslands, and all water surfaces in hurricane prone regions.

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ASCE 7-10 Reintroduction of Exposure D

Surface Roughness D: Flat, unobstructed areas and water surfaces. This category includes smooth mud flats, salt flats, and unbroken ice.

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ASCE 7-10 Exposure D

Exposure D: Exposure D shall apply where the ground surface roughness, as defined by Surface Roughness D, prevails in the upwind direction for a distance greater than 5,000 ft (1,524 m) or 20 times the building height, whichever is greater. Exposure D shall also apply where the ground surface roughness immediately upwind of the site is B or C, and the site is within a distance of 600 ft (183 m) or 20 times thenbuilding height, whichever is greater, from an Exposure D condition as defined in the previous sentence. For a site located in the transition zone between exposure categories, the category resulting in the largest wind forces shall be used

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Exposure D (ASCE 26.7; FBCB 1609.4.3 )

Exposure D if structure is adjacent to a Water Surface that is > 5000 ft wide Atlantic St. John’s River

All structures 600 feet from the Exposure D shoreline shall be designed for Exposure D

All other areas of HVHZ are Exposure C

600 feet from shoreline design for

B or C Terrain

D Terrain

Shoreline

Exposure D

Design for Exposure C

900 feet

Wind-Borne Debris Region Vult = 130 mph or greater Within one mile of mean high water

line. Vult > 140 mph All areas

ASCE 7-10 New Wind-Borne Debris Region

WIND-BORNE DEBRIS REGIONS: Areas within hurricane prone regions located:

1. Within 1 mile of the coastal mean high water line where the basic wind speed, for the building category under consideration, is equal to or greater than 130 110 mph and in Hawaii, or

2. In areas where the basic wind speed, for the building category under consideration, is equal to or greater than 140 120 mph.

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ASCE 7-10 New Wind-Borne Debris Region

Wind speeds for designating WBDR determined by Risk Category Maps

Fig. 1609A - Category II & III buildings, Except Cat III healthcare

Fig, 1609B - Category IV & Category III healthcare

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Proposed New Wind-borne Debris Region

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Proposed New Wind-borne Debris Region

Courtesy Nanette Lockwood, Solutia Inc.

Actual Differences in Design: Window and Door Pressures

Stucco over Framed Walls

Truss Uplifts

Roof Sheathing

Shear Walls

Typical Window and Door Pressures in Exposure B:

Current DP 35 psf

New DP 24 psf - 30% Decrease

Current DP 25 psf

New DP 17 psf

- 30% Decrease

3060

16070

Stucco over Framed Walls 2x4 SPF #2 @16” o.c. Exp B

9’ PL Current Code 120 mph Exp B 10’ PL New Code 130 mph

Stucco over Framed Walls 2x4 SPF #2 @16” o.c. Exp C

8’ PL Current Code 120 mph Exp C 9’ PL New Code 130 mph

Stucco over Framed Walls 2x6 SPF #2 @16” o.c. Exp B

14’ PL Current Code 120 mph Exp B 16’ PL New Code 130 mph

Stucco over Framed Walls 2x6 SPF #2 @16” o.c. Exp C

12’ PL Current Code 120 mph Exp C 14’ PL New Code 130 mph

Truss Uplift Exposure B Truss Spaced @ 24” o.c.

400 lb Uplift Current Code 120 mph Exp B

200 lb Uplift New Code 130 mph Exp B

40 ft

Girder Truss Uplift Exposure B 7’ Offset Girder Truss

910 lb Uplift Current Code 120 mph Exp B

450 lb Uplift New Code 130 mph Exp B

40 ft

Truss Uplift Exposure C Truss Spaced @ 24” o.c.

750 lb Uplift Current Code 120 mph Exp C

445 lb Uplift New Code 130 mph Exp C

600 lb Uplift New Code 130 mph Exp D

40 ft

Roof Sheathing Requirements

15/32” OSB or 19/32” Plywood for Current Code 120 mph Exp C

7/16” OSB ok for New Code 130 mph Exp C and D

Wind Pressure on a 6:12 Pitch Roof

IRC 2012 R301.2.1Wind limitations. Buildings and portions

thereof shall be limited by wind speed, as defined in TableR301.2(1) and construction methods in accordance with this code. Basic wind speeds shall be determined from Figure R301.2(4)A. The structural provisions of this code for wind loads are not permitted where wind design is required as specified in Section R301.2.1.1 …

IRC 2010 Fig 301.2(4)A

IRC 2012 R301.2.1.1 Wind design required Design criteria. In

regions where wind design is required in accordance with the basic wind speeds from Figure R301.2(4)B equal or exceed 100 miles per hour (45 m/s) in hurricane-prone regions, or 110 miles per hour (49 m/s) elsewhere, the design of buildings for wind loads shall be in accordance with one of the following methods. The elements of design not addressed by those documents in Items 1 through 4 shall be in accordance with this code.

IRC 2012

R301.2.1.2 Protection of openings. Glazing Windows in buildings located in windborne debris regions shall be have glazed openings protected from windborne debris. Glazed opening protection for windborne debris shall meet the requirements of the Large Missile Test of ASTM E 1996 and ASTM E 1886 referenced therein. The applicable wind zones for establishing missile types in ASTM E 1996 are shown on Figure R301.2(4)C. Garage door glazed opening protection for windborne debris shall meet the requirements of an approved impact resisting standard or ANSI/DASMA 115.

IRC 2012 Exp D R301.2.1.4 Exposure category. For each wind direction

considered, an exposure category… (no change)

1.&2. (no change)

3. Exposure C. Open terrain with scattered obstructions, including surface undulations or other irregularities, having heights generally less than 30 feet (9144 mm) extending more than 1500 feet (457 m) from the building site in any quadrant. This exposure shall also apply to any building located within Exposure B type terrain where the building is directly adjacent to open areas of Exposure C type terrain in any quadrant for a distance of more than 600 feet (183 m). This category includes flat open country, and grasslands and shorelines in hurricane prone regions.

IRC 2012 Exp D R301.2.1.4 Exposure category. For each wind direction

considered, an exposure category… (no change)

4. Exposure D. Flat, unobstructed areas exposed to wind flowing over open water (excluding shorelines in hurricane prone regions) for a distance of at least 1 mile (1.61 km). Shorelines in Exposure D include inland waterways, the Great Lakes, and coastal areas of California, Oregon, Washington and Alaska. This exposure shall apply only to those buildings and other structures exposed to the wind coming from over the water. Exposure D extends inland from the shoreline a distance of 1500 feet (457 m) or 10 times the height of the building or structure, whichever is greater.

Test Facilities

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2010 Florida Building Code, Building

Building/Structural Summary

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