Window / Door Replacement

1. Provide two copies of a plot plan showing the size and locations of all doors and windows in the structure. Mark each opening that is to be replaced with a new door or window; note the quantity of the windows at each opening and the type of window or door to be installed i.e. single hung, horizontal slider, fixed glass, glass door, etc.

2. Provide design pressures for each opening as prescribed in Chapter 16 of the Florida Building

Code or if a single family or duplex residence, design pressures can be obtained from the Broward County Fenestration Wind Load Chart. Show the mean roof height of the building on the plan.

3. Provide a current Product Approval for each type of window and door, which you intend to

install. Please contact the store/supplier where you purchased your products to obtain the required Product Approval documents.

4. The Product Approvals contain charts and tables, which provide component and fastener options- including window size, glazing thickness, mounting details, etc. Highlight or mark-up site specific conditions.

5. Shutters are required if more than 25% of the openings of the building are being replaced on a single family or duplex residence; and you must provide Product Approval for the shutters. Impact resistance is required on all commercial retrofits regardless of size or amount.

6. Two or more windows located within one opening require a mullion. A Product Approval must be submitted for the mullion with installation options highlighted.

SAMPLE:

Must include property address

Retrofit of Windows, Doors, Garage Doors, Shutters, and Skylights

FBC 2004 Existing Building, Alteration Level 1

At the Board of Rules and Appeals meeting of February 9, 2006, an interpretation was approved for Retrofit of

Windows, Doors, Garage Doors, Shutters and Skylights, of the 2004 Florida Building Code as follows:

1. Window or door buck inspections are not required the buck shall comply with Section 1714.5.4.1

specifically, unless otherwise tested, buck shall extend beyond the entire face of the window of door

frame such that full support of the frame is provided.

2. A Florida Professional Engineer or Architect may modify the buck with fasteners as specified in a

Notice of Acceptance. Such modification must be documented with a signed and sealed letter or

drawing.

3. To obtain the required design pressure for a specific opening at a specific site, an individual must

utilize one of the following and submit documentation as indicated.

a. A site specific (signed and sealed) by a Florida Professional Engineer or Architect, indicating

the location of all retro openings and the required design pressure.

b. A site-specific plan (not sealed) indicating the location of all openings accompanied by a worst-

case design pressure chart (signed and sealed) prepared by a Florida P.E. or Architect.

c. A site-specific plan (not sealed) indicating the location of all openings and indicating the

required design pressure based on FBC table 1609.6(b & d) FRC Table R301.2.2 (2 & 3) for

windows, doors, shutters, and skylights and table 1609.6E for garage doors.

Note: FBC Table 1609.6 (b & d) and FRC Table 1609 R301.2.2 (2 & 3) and 1609.6E has been

adopted for retrofit windows, doors, shutters and skylights (only with a permit application date

preceding September 1, 1994*, and is limited to building with a roof mean height of 30’.

4. Required design pressure is required to meet FBC Table 1609.6 (b & d) FRC Table R301.2.2 (2 & 3)

or ASCE-7-02 for windows, doors, shutters and skylights and 1609.6E for garage doors.

Note: FBC Table 1609.6 (b & d) FRC Table R301.2.2 (2 & 3) 1609.6E may be used to

determine wind pressure for retrofit of windows, door, garage doors and skylights, but only on

buildings with a permit application prior to September 1, 2004, * and shall be limited to

buildings with a maximum roof mean height of 30’.

*Buildings with a permit application date on or after September 1, 1994, design measures were required to be

shown on plans, should be used for retro.

EFFECTIVE DATE: JANUARY 20, 2020

Mean Roof HeightTributary Area 10 20 35 50 100 500 10 20 35 50 100 500

Wall Positive Pressure 38.0 36.2 34.9 34.0 32.3 28.3 40.3 38.5 37.0 36.1 34.3 30.1Zone 4 Negative Pressure ‐41.2 ‐39.5 ‐38.1 ‐37.2 ‐35.5 ‐31.5 ‐43.7 ‐41.9 ‐40.5 ‐39.5 ‐37.7 ‐33.5 38.6 ‐48.2Zone 5 Negative Pressure ‐50.8 ‐47.4 ‐44.6 ‐42.9 ‐39.5 ‐31.5 ‐54.0 ‐50.4 ‐47.4 ‐45.6 ‐41.9 ‐33.5 37.4 ‐45.7

Mean Roof Height 35.4 ‐41.8Tributary Area 10 20 35 50 100 500 10 20 35 50 100 500 38.7 ‐48.3

Wall Positive Pressure 42.3 40.4 38.8 37.8 35.9 31.5 43.9 41.9 40.3 39.3 37.3 32.8 37.0 ‐45.0Zone 4 Negative Pressure ‐45.8 ‐43.9 ‐42.4 ‐41.4 ‐39.5 ‐35.1 ‐47.6 ‐45.7 ‐44.1 ‐43.1 ‐41.1 ‐36.5 41.8 ‐54.6Zone 5 Negative Pressure ‐56.6 ‐52.8 ‐49.7 ‐47.8 ‐43.9 ‐35.1 ‐58.8 ‐54.7 ‐51.7 ‐49.6 ‐45.7 ‐36.5 39.8 ‐50.6

10 10

Effective Wind Area

Roof and Wall Zone Chart DiagramsWall Pressure Chart Flat Roof Uplift Chart Gable Roof Uplift Chart Hip Roof Uplift Chart

Wall Pressure For All Roof Types Garage/Door Pressures15 Ft 20 Ft <= 30 Ft

Instructions on how to use these Charts:  Determine Mean Roof Height, h , which is top of roof for flat roofs or the mean roof height for pitched roofs. Find your least horizontal dimension for your building, not including a overhang if it occurs.  Calculate the value of, a , = 10% of least horizontal dimension or 0.4*h, whichever is 

smaller, but not less than either 4% of least horizontal dimension or 3 feet. If your roof height is less than 30 feet, but not exactly 15, 20, or 25 feet, you will need to go to the next higher roof height. If your Mean Foof Height is higher than 30 feet, these charts do not apply.  Review the diagram which illustrate the wall and roof zones and determine the wind zone in which the component is located. Determine the tributary area of the component. If the tributary area falls in between values, use the value of the smaller tributary area.  Select the positive and negative wind pressures corresponding to the wall or roof zone where your component is located.   Door 

pressures shown are for the most common door sizes and are worst case for heights <= 30 Feet.

16 73 76 7

Broward County Fenestration Voluntary Wind Load Chart*Per ASCE 7‐16 Part 1 and FBC (2020) for Retrofitting in Accordance with Formal Interpretation #24

For Detached One‐and Two family dwellings and Multiple Single‐Family Dwellings (Townhouses) with Mean Roof Height ≤ 30 feetWind 170 mph (3‐second gust) / Exposure C** / Kd = 0.85 / Kzt = 1.0 / Pressures are in PSF / Not for use in Coastal (Exposure 'D' areas)

* Using Allowable Stress Design methodology (P = 0.6w) / ** Exposure C or D shall be determined according to ASCE 7‐16 Section 26.7 (Exposure Categories)

Positive Negative

25 Ft 30 Ft 14 149 7

Width Height8 8

Page 2 of 3

Positive* 15.4/38.0 Positive 23.2 Positive 23.2 Positive 34.7 Positive 28.3 Positive 28.3Zone Zone Roof Overhang Roof Overhang Roof Overhang Zone Roof Overhang Roof Overhang1 ‐60.5 1, 2e ‐70.1 ‐80.4 ‐54.0 ‐64.3 ‐63.7 ‐83.6 1 ‐63.7 ‐74.0 ‐50.8 ‐60.81' ‐34.8 2n & 2r ‐102 ‐113 ‐86.2 ‐96.5 ‐70.1 ‐90.1 2e ‐89.4 ‐99.7 ‐70.1 ‐79.02 ‐79.8 3e ‐102 ‐132 ‐86.2 ‐116 ‐86.7 ‐107 2r ‐83.0 ‐93.3 ‐70.1 ‐79.03* ‐109 3r ‐122 ‐151 ‐102 ‐128 ‐70.1 ‐90.1 3 ‐89.4 ‐119 ‐70.1 ‐95.3

Positive* 16.4/40.3 Positive 24.6 Positive 24.6 Positive 36.9 Positive 30.1 Positive 30.1Zone Zone Roof Overhang Roof Overhang Roof Overhang Zone Roof Overhang Roof Overhang1 ‐64.2 1, 2e ‐74.5 ‐85.4 ‐57.4 ‐68.3 ‐67.7 ‐88.9 1 ‐67.6 ‐78.6 ‐54.0 ‐64.61' ‐36.9 2n & 2r ‐109 ‐120 ‐91.5 ‐102 ‐74.5 ‐95.7 2e ‐95.0 ‐106 ‐74.5 ‐84.02 ‐84.8 3e ‐109 ‐140 ‐91.5 ‐123 ‐92.1 ‐113 2r ‐88.1 ‐99.1 ‐74.5 ‐84.03* ‐116 3r ‐129 ‐161 ‐108 ‐136 ‐74.5 ‐95.7 3 ‐95.0 ‐126 ‐74.5 ‐101

Positive* 17.2/42.3 Positive 25.8 Positive 25.8 Positive 38.7 Positive 31.5 Positive 31.5Zone Zone Roof Overhang Roof Overhang Roof Overhang Zone Roof Overhang Roof Overhang1 ‐67.3 1, 2e ‐78.1 ‐89.5 ‐60.2 ‐71.6 ‐70.9 ‐93.1 1 ‐70.9 ‐82.4 ‐58.6 ‐67.71' ‐38.7 2n & 2r ‐114 ‐125 ‐96 ‐107 ‐78.1 ‐100 2e ‐99.6 ‐111 ‐78.1 ‐88.02 ‐88.8 3e ‐114 ‐147 ‐96 ‐129 ‐96.6 ‐119 2r ‐92.4 ‐104 ‐78.1 ‐88.03* ‐121 3r ‐135 ‐168 ‐113 ‐143 ‐78.1 ‐100 3 ‐99.6 ‐133 ‐78.1 ‐106

Positive* 17.9/43.9 Positive 26.8 Positive 26.8 Positive 40.2 Positive 32.8 Positive 32.8Zone Zone Roof Overhang Roof Overhang Roof Overhang Zone Roof Overhang Roof Overhang1 ‐70.0 1, 2e ‐81.1 ‐93.1 ‐62.6 ‐74.5 ‐73.7 ‐96.8 1 ‐73.7 ‐85.6 ‐58.8 ‐70.41' ‐40.2 2n & 2r ‐118 ‐130 ‐99.8 ‐112 ‐81.1 ‐104 2e ‐103 ‐115 ‐81.1 ‐91.42 ‐92.3 3e ‐118 ‐153 ‐99.8 ‐134 ‐100 ‐123 2r ‐96.0 ‐108 ‐81.1 ‐91.43* ‐126 3r ‐141 ‐175 ‐118 ‐148 ‐81.1 ‐104 3 ‐103 ‐138 ‐81.1 ‐110

SIMPLIFIED ROOF UPLIFT CHART FOR ROOFING APPLICATIONSThis simplified chart represents the worst case wind pressures for the various roof slopes and heights.  This chart is based on a Tributary Area = 10 SF which is required for roofing applications.   If the roof height is less than 30 feet, but not exactly 15, 20, or 25 feet, you will need to go to the next higher roof height. If your roof height is higher 

than 30 feet, these charts do not apply. Refer to Roof Chart Diagrams on Page 1 for Roof Zone Locations 

Mean Roof Height = 15 FeetFlat Roof Gable Roof 1.51 to 4:12 Gable Roof 4.1 to 6:12 Gable Roof 6.1: to 12:12 Hip Roof 1.51 to 4:12 Hip Roof 4.1 to 6:12

Mean Roof Height = 20 FeetFlat Roof Gable Roof 1.51 to 4:12 Gable Roof 4.1 to 6:12 Gable Roof 6.1: to 12:12 Hip Roof 1.51 to 4:12 Hip Roof 4.1 to 6:12

Mean Roof Height = 25 FeetFlat Roof Gable Roof 1.51 to 4:12 Gable Roof 4.1 to 6:12 Gable Roof 6.1: to 12:12 Hip Roof 1.51 to 4:12 Hip Roof 4.1 to 6:12

* If Parapet >= 3 Ft occurs around entire building use the same Zone 2 pressure for Zone 3 and use the higher positive pressure shown

Mean Roof Height = 30 FeetFlat Roof Gable Roof 1.51 to 4:12 Gable Roof 4.1 to 6:12 Gable Roof 6.1: to 12:12 Hip Roof 1.51 to 4:12 Hip Roof 4.1 to 6:12

Page 3 of 3

One North University Drive

Suite 3500-B

Plantation, Florida 33324

Phone: 954-765-4500

Fax: 954-765-4504

www.broward.org/codeappeals

BROWARD COUNTY

BOARD OF RULES AND APPEALS

FBC 6th Edition (2017) FORMAL INTERPRETATION (#5)

DATE: October 12, 2017

TO: All Building Officials

FROM: James DiPietro, Administrative Director

SUBJECT: Retrofit of Windows, Doors, Garage Doors, Shutters and Skylights

FBC Existing Building, Alteration Level I

At its meeting of October 12th, 2017 the Board approved an interpretation of Retrofit of Windows, Doors, Garage Doors, Shutters and Skylights, for detached one and two family dwellings, and multiple single family dwellings, (townhouses) with common roof height < 30 feet.

1. A Florida Professional Engineer or Architect may modify the buck or fasteners as specified in a Notice of Acceptance. Such modification must be documented with a signed and sealed letter or drawing.

2. To obtain the required design pressure for a specific opening at a specific site, an individual must utilize one of the following and submit documentation as indicated.

a) A site-specific plan (signed and sealed) by a Florida Professional Engineer or Architect, indicating the location of all retro openings and the required design pressures.

b) A site-specific plan (not sealed) indicating the location of all retro openings accompanied by a worst case design pressure chart (signed and sealed) prepared by a Florida P.E. or Architect.

c) A site-specific plan (not sealed) indicating the location of all openings and indicating the required design pressures based on the Broward County Fenestration Voluntary Wind Load Chart. (see attached chart).

3. Buildings with a (height) > 30 feet or more shall have a site-specific design (signed and sealed) by a Florida Professional Engineer or Architect, indicating the location of all retro openings and the required design pressures for each opening.

NOTE: Generic charts, graphs alone, etc. are not acceptable for buildings above 30 feet.

ORIGINAL DATE: September 12, 2012

RE-ISSUED: October 12, 2017

EFFECTIVE DATE: January 1, 2018

****PLEASE POST AT YOUR PERMIT COUNTER*****

Page 1 of 2 F.I. #5

C:\Users\mguerasio\Documents\Formal Interpretations\FI-5Retrofit of Windows.Alteration Level 1REV.doc

2017 Voting Members

Chair

Mr. Jeffrey Lucas, FM, CFI, CFEI

Fire Service Professional Vice-Chair

Mr. Kenneth B. Wynn

Representative Disabled Community Mr. John Famularo, Roofing Contractor

Mrs. Shalanda Giles Nelson, General Contractor

Mr. Daniel Lavrich, P.E.

Structural Engineer Mr. Daniel Rourke

Master Plumber Mr.

Gregg D’Attile, Mechanical Contractor

Mr. Stephen E. Bailey, P.E. Electrical Engineer Mr. Ron Burr

Swimming Pool Contractor Mr. John Sims,

Master Electrician

VACANT

Consumer Advocate

Mr. Abbas H. Zackria, CSI

Architect

Robert A. Kamm, P.E. Mechanical Engineer

2017 Alternate Board Members

Mr. Jeff Falkanger

Architect

Mr. Steven Feller, P.E. Mechanical Engineer

Mr. Alberto Fernandez,

General Contractor Mr. Robert Taylor

Fire Service

Mr. Gary Elzweig, P.E

Structural Engineer

Mr. David Rice, P.E. Electrical Engineer

Mr. James Terry,

Master Plumber Mr. David Tringo,

Master Electrician

Mr. William Flett, Roofing Contractor

Board Attorney

Charles M. Kramer, Esq.

Board Administrative Director

James DiPietro

—

—Established 1971—

Broward County Fenestration Voluntary Wind Load Chart* Per ASCE 7‐10 Method 1, Part 1 and FBC (2017) for Retrofiting in Accordance with Formal Interpretation #5

For Detached One‐and Two family dwellings and Multiple Single‐Family Dwellings (Townhouses) with Mean Roof Height ≤ 30 feet Wind 170 mph (3‐second gust) / Exposure C** / Kd = 0.85 / Kzt = 1.0 / Pressures are in PSF / Not for use in Coastal (Exposure 'D' areas)

* Using Allowable Stress Design methodology (P = 0.6w) / ** Exposure shall be determined according to ASCE 7‐10 Section 26.7.3 (Exposure Categories)

Effective

Wind

Location:

Mean Roof Height of 15 feet

Zone

Mean Roof Height of 20 feet Mean Roof Height of 25 feet Mean Roof Height of 30 feet

Zone Zone Zone Area Gable or Hip

1 2 3 1 2 3 1 2 3 1 2 3

(ft2)

10

20

50

100

10

20

50

100

10

20

50

Roof

Gable/Hip

Roof

θ ≤ 7⁰

(0 to 1.5:12)

Gable/Hip

Roof***

7⁰ < θ ≤ 27⁰

(1.5 to 6:12)

Gable Roof

27⁰ < θ ≤ 45⁰

(6 to 12:12)

+ – + – + – + – + – + – + – + – + – + – + – + –

16.0 ‐37.8 16.0 ‐63.4 16.0 ‐95.4 16.3 ‐40.2 16.3 ‐67.4 16.3 ‐101.4 17.1 ‐42.1 17.1 ‐70.6 17.1 ‐106.3 17.8 ‐43.7 17.8 ‐73.4 17.8 ‐110.4

16.0 ‐36.8 16.0 ‐56.7 16.0 ‐79.1 16.0 ‐39.1 16.0 ‐60.2 16.0 ‐84.0 16.0 ‐41.0 16.0 ‐63.1 16.0 ‐88.0 16.7 ‐42.6 16.7 ‐65.6 16.7 ‐91.5

16.0 ‐35.6 16.0 ‐47.7 16.0 ‐57.4 16.0 ‐37.8 16.0 ‐50.7 16.0 ‐61.0 16.0 ‐39.6 16.0 ‐53.2 16.0 ‐63.9 16.0 ‐41.1 16.0 ‐55.2 16.0 ‐66.4

16.0 ‐34.6 16.0 ‐41.0 16.0 ‐41.0 16.0 ‐36.8 16.0 ‐43.6 16.0 ‐43.6 16.0 ‐38.5 16.0 ‐45.7 16.0 ‐45.7 16.0 ‐40.0 16.0 ‐47.4 16.0 ‐47.4

21.8 ‐34.6 21.8 ‐60.2 21.8 ‐89.0 23.1 ‐36.8 23.1 ‐64.0 23.1 ‐94.6 24.3 ‐38.5 24.3 ‐67.1 24.3 ‐99.2 25.2 ‐40.0 25.2 ‐69.7 25.2 ‐103.0

19.9 ‐33.6 19.9 ‐55.4 19.9 ‐83.3 21.1 ‐35.7 21.1 ‐58.9 21.1 ‐88.5 22.1 ‐37.4 22.1 ‐61.7 22.1 ‐92.7 23.0 ‐38.9 23.0 ‐64.1 23.0 ‐96.3

17.3 ‐32.4 17.3 ‐49.0 17.3 ‐75.6 18.4 ‐34.4 18.4 ‐52.1 18.4 ‐80.3 19.3 ‐36.0 19.3 ‐54.6 19.3 ‐84.2 20.0 ‐37.4 20.0 ‐56.7 20.0 ‐87.5

16.0 ‐31.4 16.0 ‐44.2 16.0 ‐69.8 16.3 ‐33.3 16.3 ‐47.0 16.3 ‐74.2 17.1 ‐35.0 17.1 ‐49.2 17.1 ‐77.8 17.8 ‐36.3 17.8 ‐51.1 17.8 ‐80.8

34.6 ‐37.8 34.6 ‐44.2 34.6 ‐44.2 36.8 ‐40.2 36.8 ‐47.0 36.8 ‐47.0 38.5 ‐42.1 38.5 ‐49.2 38.5 ‐49.2 40.0 ‐43.7 40.0 ‐51.1 40.0 ‐51.1

33.6 ‐35.9 33.6 ‐42.3 33.6 ‐42.3 35.7 ‐38.1 35.7 ‐44.9 35.7 ‐44.9 37.4 ‐39.9 37.4 ‐47.1 37.4 ‐47.1 38.9 ‐41.5 38.9 ‐48.9 38.9 ‐48.9

32.4 ‐33.3 32.4 ‐39.7 32.4 ‐39.7 34.4 ‐35.4 34.4 ‐42.2 34.4 ‐42.2 36.0 ‐37.1 36.0 ‐44.2 36.0 ‐44.2 37.4 ‐38.6 37.4 ‐46.0 37.4 ‐46.0

100 31.4 ‐31.4 31.4 ‐37.8 31.4 ‐37.8 33.3 ‐33.3 33.3 ‐40.2 33.3 ‐40.2 35.0 ‐35.0 35.0 ‐42.1 35.0 ‐42.1 36.3 ‐36.3 36.3 ‐43.7 36.3 ‐43.7

*** For Hip Roofs with angle > 7 degrees (1.5:12) and ≤ 25 degrees (5.5:12), Zone 3 shall be treated as Zone 2 (Figure 30.4‐2 B, Note 7, p. 337)

Effective Wind

Mean Roof Height of 15 feet Mean Roof Height of 20 feet Mean Roof Height of 25 feet Mean Roof Height of 30 feet

Zone Zone Zone Zone

Area Location 4 5 4 5 4 5 4 5

(ft2) + – + – + – + – + – + – + – + –

10 37.8 ‐41.0 37.8 ‐50.6 40.2 ‐43.6 40.2 ‐53.8 42.1 ‐45.7 42.1 ‐56.4 43.7 ‐47.4 43.7 ‐58.6

20 36.1 ‐39.3 36.1 ‐47.2 38.3 ‐41.7 38.3 ‐50.1 40.2 ‐43.8 40.2 ‐52.6 41.8 ‐45.5 41.8 ‐54.6

50 Wall 33.8 ‐37.0 33.8 ‐42.7 36.0 ‐39.4 36.0 ‐45.4 37.7 ‐41.3 37.7 ‐47.5 39.2 ‐42.9 39.2 ‐49.4

100 32.1 ‐35.3 32.1 ‐39.3 34.1 ‐37.5 34.1 ‐41.7 35.8 ‐39.4 35.8 ‐43.8 37.2 ‐40.9 37.2 ‐45.5

500 28.2 ‐31.4 28.2 ‐31.4 29.9 ‐33.3 29.9 ‐33.3 31.4 ‐35.0 31.4 ‐35.0 32.6 ‐36.3 32.6 ‐36.3

Garage Door Wind Loads for a Building with 30‐foot Mean Roof Height

Exposure C

Tables 1609.7(1) & (2), and Section 1609.3.1

Effective Wind Area Roof Angle Wind Load

Width Height + – 8 8 35.2 ‐39.8

0 ‐ 10 10 10 degrees 34.1 ‐38.2

14 14 32.3 ‐36.1 For Effective Wind Areas between those given, values may be interpolated. Otherwise use the value associated with the lower Effective Wind Area.

9 7

16 7

> 10

degrees

38.4 ‐43.4

36.8 ‐41.0

End Zone (a) shall be the smaller of 10% of Least Hor. Dist. or 40% of Mean Roof Height ('h'), but not less than 4% of Least Hor. Dist. or 3 ft.

Identify the zone per the figure or information by others. Any questionable zone is to be considered the more critical zone.

Design is based on the 3‐second gust (wind velocity) for Risk Category II (general residential & commercial construction) per FBC 1620.2 Broward. These tables not for use with essential facilities or assembly occupancies.

Page 2 of 2 Effective Date: January 1, 2018 FBC 6th Edition (2017) Formal Interpretation #5