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ADOPTS WITH AMENDMENTS:

International Existing Building Code 2012 (IEBC 2012)

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Important Disclaimer

Preface

Effective Use of the International Existing Building Code

2015 Minnesota Building Code Administration

2015 Minnesota Conservation Code for Existing Buildings

Chapter 1 Scope and Administration

Chapter 2 Definitions

Chapter 3 Compliance Methods

Chapter 4 Prescriptive Compliance Method

Chapter 5 Classification of Work

Chapter 6 Repairs

Chapter 7 Alterations—level 1

Chapter 8 Alterations—level 2

Chapter 9 Alterations—level 3

Chapter 10 Change of Occupancy

Chapter 11 Additions

Chapter 12 Historic Buildings

Chapter 13 Relocated or Moved Buildings

Chapter 14 Performance Compliance Methods

Ibc Chapter 33 Safeguards During Construction

Chapter 16 Referenced Standards

Resource A Guidelines on Fire Ratings of Archaic Materials and Assemblies

The provisions of this chapter shall apply to the alteration, repair, addition and change of occupancy of existing structures, including historic and moved structures, as referenced in Section 301.1.3. The provisions of this chapter are intended to maintain or increase the current degree of public safety, health and general welfare in existing buildings while permitting repair, alteration, addition and change of occupancy without requiring full compliance with Chapters 5 through 13, except where compliance with other provisions of this code is specifically required in this chapter.
Alterations, repairs, additions and changes of occupancy to existing structures shall comply with the provisions of this chapter or with one of the methods provided in Section 301.1.
Structures existing prior to the effective date of this code, in which there is work involving additions, alterations, or change of occupancy shall be made to conform to the requirements of IEBC chapter 14 or the provisions of IEBC chapters 5 to 13. The provisions of Sections 1401.2.1 to 1401.2.5 shall apply to existing occupancies that will continue to be, or are proposed to be, in Groups A, B, E, F, M, R, and S. These provisions shall not apply to buildings with occupancies in Group H or I.
Where an existing building is changed to a new occupancy classification and this section is applicable, the provisions of this section for the new occupancy shall be used to determine compliance with this code.
Where a portion of the building is changed to a new occupancy classification and that portion is separated from the remainder of the building with fire barrier or horizontal assemblies having a fire-resistance rating as required by Table 508.4 of the International Building Code or Section R317 of the International Residential Code for the separate occupancies, or with approved compliance alternatives, the portion changed shall be made to conform to the provisions of this section.
Where a portion of the building is changed to a new occupancy classification and that portion is not separated from the remainder of the building with fire barriers or horizontal assemblies having a fire-resistance rating as required by Table 508.4 of the International Building Code or Section R317 of the International Residential Code for the separate occupancies, or with approved compliance alternatives, the provisions of this section which apply to each occupancy shall apply to the entire building. Where there are conflicting provisions, those requirements which secure the greater public safety shall apply to the entire building or structure.
Additions to existing buildings shall comply with the requirements of the International Building Code, International Residential Code, and this code for new construction. The combined height and area of the existing building and the new addition shall not exceed the height and area allowed by Chapter 5 of the International Building Code. Where a fire wall that complies with Section 706 of the International Building Code is provided between the addition and the existing building, the addition shall be considered a separate building.
An existing building or portion thereof that does not comply with the requirements of this code for new construction shall not be altered or repaired in such a manner that results in the building being less safe or sanitary than such building is currently. If, in the alteration or repair, the current level of safety or sanitation is to be reduced, the portion altered or repaired shall conform to the requirements of Chapters 2 through 12 and Chapters 14 through 33 of the International Building Code.
Deleted (see the 2015 Minnesota Accessibility Code).
For repairs, alterations, additions, and changes of occupancy to existing buildings that are evaluated in accordance with this section, compliance with this section shall be accepted by the code official.
Where the code official determines that an unsafe condition or hazardous building, as defined in Minnesota Statutes, Section 463.15, exists as provided for in Minnesota Rules, part 1300.0180, such unsafe condition or hazard shall be abated in accordance with Minnesota Statutes, Sections 463.15 to 463.26.
Deleted.
In flood hazard areas, buildings that are evaluated in accordance with this section shall comply with Section 1612 of the International Building Code if the work covered by this section constitutes substantial improvement.
For proposed work covered by this chapter, the building owner shall cause the existing building to be investigated and evaluated in accordance with the provisions of Sections 1401.4 through 1401.9.
The owner shall have a structural analysis of the existing building made to determine adequacy of structural systems for the proposed alteration, addition or change of occupancy. The analysis shall demonstrate that the building with the work completed is capable of resisting the loads specified in Chapter 16 of the International Building Code.
The results of the investigation and evaluation as required in Section 1401.4, along with proposed compliance alternatives, shall be submitted to the code official.
The code official shall determine whether the existing building, with the proposed addition, alteration, or change of occupancy, complies with the provisions of this section in accordance with the evaluation process in Sections 1401.5 through 1401.9.
The evaluation shall be comprised of three categories: fire safety, means of egress, and general safety, as defined in Sections 1401.5.1 through 1401.5.3.
Included within the fire safety category are the structural fire resistance, automatic fire detection, fire alarm, automatic sprinkler system and fire suppression system features of the facility.
Included within the means of egress category are the configuration, characteristics, and support features for means of egress in the facility.
Included within the general safety category are the fire safety parameters and the means-of-egress parameters.
The evaluation process specified herein shall be followed in its entirety to evaluate existing buildings. Table 1401.7 shall be utilized for tabulating the results of the evaluation. References to other sections of this code indicate that compliance with those sections is required in order to gain credit in the evaluation herein outlined. In applying this section to a building with mixed occupancies, where the separation between the mixed occupancies does not qualify for any category indicated in Section 1401.6.16, the score for each occupancy shall be determined, and the lower score determined for each section of the evaluation process shall apply to the entire building.

Where the separation between the mixed occupancies qualifies for any category indicated in Section 1401.6.16, the score for each occupancy shall apply to each portion of the building based on the occupancy of the space.

The value for building height shall be the lesser value determined by the formula in Section 1401.6.1.1. Chapter 5 of the International Building Code, including allowable increases due to automatic sprinklers as provided for in Section 504.2 of the International Building Code, shall be used to determine the allowable height of the building. Subtract the actual building height from the allowable height and divide by 121/2 feet (3810 mm). Enter the height value and its sign (positive or negative) in Table 1401.7 under Safety Parameter 1401.6.1, Building Height, for fire safety, means of egress, and general safety. The maximum score for a building shall be 10.
The following formulas shall be used in computing the building height value.
(Equation 14-1)
Height value, stories = (AS-EBS) × CF(Equation 14-2)
where:
AH=Allowable height in feet (mm) from Table 503
of the International Building Code.
EBH=Existing building height in feet (mm).
AS=Allowable height in stories from Table 503 of
the International Building Code.
EBS=Existing building height in stories.
CF=1 if (AH) - (EBH) is positive.
CF=Construction-type factor shown in Table
1401.6.6(2) if (AH) - (EBH) is negative.
Note: Where mixed occupancies are separated and individually evaluated as indicated in Section 1401.6, the values AH, AS, EBH and EBS shall be based on the height of the occupancy being evaluated.
The value for building area shall be determined by the formula in Section 1401.6.2.2. Section 503 of the International Building Code and the formula in Section 1401.6.2.1 shall be used to determine the allowable area of the building. This shall include any allowable increases due to frontage and automatic sprinklers as provided for in Section 506 of the International Building Code. Subtract the actual building area from the allowable area and divide by 1,200 square feet (112 m2). Enter the area value and its sign (positive or negative) in Table 1401.7 under Safety Parameter 1401.6.2, Building Area, for fire safety, means of egress and general safety. In determining the area value, the maximum permitted positive value for area is 50 percent of the fire safety score as listed in Table 1401.8, Mandatory Safety Scores.
The following formula shall be used in computing allowable area:
Aa = {At + [At × If] + [At × Is]}(Equation 14-3)
where:
Aa=Allowable building area per story (square feet).
At=Tabular building area per story (square feet) in accordance with Table 503 of the International Building Code.
Is=Area increase factor due to sprinkler protection as calculated in accordance with Section 506.3 of the International Building Code.
If=Area increase factor due to frontage as calculated in accordance with Section 506.2 of the International Building Code.
The following formula shall be used in computing the area value. Determine the area value for each occupancy floor area on a floor-by-floor basis. For each occupancy, choose the minimum area value of the set of values obtained for the particular occupancy.
(Equation 14-4)
where:
i=Value for an individual separated occupancy on a floor.
n=Number of separated occupancies on a floor.
Evaluate the compartments created by fire barriers or horizontal assemblies which comply with Sections 1401.6.3.1 and 1401.6.3.2 and which are exclusive of the wall elements considered under Sections 1401.6.4 and 1401.6.5. Conforming compartments shall be figured as the net area and do not include shafts, chases, stairways, walls, or columns. Using Table 1401.6.3, determine the appropriate compartmentation value (CV) and enter that value into Table 1401.7 under Safety Parameter 1401.6.3, Compartmentation, for fire safety, means of egress, and general safety.

[B] TABLE 1401.6.3
COMPARTMENTATION VALUES

OCCUPANCYCATEGORIES
a
Compartment size equal
to or greater than 15,000
square feet
b
Compartment size of
10,000 square feet
c
Compartment size of
7,500 square feet
d
Compartment size of
5,000 square feet
e
Compartment size of
2,500 square feet or less
A-1, A-306101418
A-204101418
A-4, B, E, S-205101520
F, M, R, S-104101622
For SI: 1 square foot = 0.0929 m2.
A wall used to create separate compartments shall be a fire barrier conforming to Section 707 of the International Building Code with a fire-resistance rating of not less than 2 hours. Where the building is not divided into more than one compartment, the compartment size shall be taken as the total floor area on all floors. Where there is more than one compartment within a story, each compartmented area on such story shall be provided with a horizontal exit conforming to Section 1025 of the International Building Code. The fire door serving as the horizontal exit between compartments shall be so installed, fitted, and gasketed that such fire door will provide a substantial barrier to the passage of smoke.
A floor/ceiling assembly used to create compartments shall conform to Section 711 of the International Building Code and shall have a fire-resistance rating of not less than 2 hours.
Evaluate the fire-resistance rating of floors and walls separating tenants, including dwelling units, and not evaluated under Sections 1401.6.3 and 1401.6.5. Under the categories and occupancies in Table 1401.6.4, determine the appropriate value and enter that value in Table 1401.7 under Safety Parameter 1401.6.4, Tenant and Dwelling Unit Separation, for fire safety, means of egress, and general safety.

[B] TABLE 1401.6.4
SEPARATION VALUES

OCCUPANCYCATEGORIES
abcde
A-100001
A-2-5-3013
R-4-2024
A-3, A-4, B, E, F, M, S-1-4-3024
S-2-5-2024
The categories for tenant and dwelling unit separations are:

1. Category a—No fire partitions; incomplete fire partitions; no doors; doors not self-closing or automatic-closing.

2. Category b—Fire partitions or floor assemblies with less than 1-hour fire-resistance ratings or not constructed in accordance with Section 708 or 711 of the International Building Code, respectively.

3. Category c—Fire partitions with 1-hour or greater fire-resistance ratings constructed in accordance with Section 708 of the International Building Code and floor assemblies with 1-hour but less than 2-hour fire-resistance ratings constructed in accordance with Section 711 of the International Building Code or with only one tenant within the floor area.

4. Category d—Fire barriers with 1-hour but less than 2-hour fire-resistance ratings constructed in accordance with Section 707 of the International Building Code and floor assemblies with 2-hour or greater fire-resistance ratings constructed in accordance with Section 711 of the International Building Code.

5. Category e—Fire barriers and floor assemblies with 2-hour or greater fire-resistance ratings and constructed in accordance with Sections 711 and 711 of the International Building Code, respectively.

Evaluate the fire-resistance rating and degree of completeness of walls which create corridors serving the floor and that are constructed in accordance with Section 1018 of the International Building Code. This evaluation shall not include the wall elements considered under Sections 1401.6.3 and 1401.6.4. Under the categories and groups in Table 1401.6.5, determine the appropriate value and enter that value into Table 1401.7 under Safety Parameter 1401.6.5, Corridor Walls, for fire safety, means of egress, and general safety.

[B] TABLE 1401.6.5
CORRIDOR WALL VALUES

OCCUPANCYCATEGORIES
abcada
A-1-10-402
A-2-30-1202
A-3, F, M, R, S-1-7-302
A-4, B, E, S-2-5-205
a Corridors not providing at least one-half the travel distance for all occupants on a floor shall use Category b.
The categories for corridor walls are:

1. Category a—No fire partitions; incomplete fire partitions; no doors; or doors not self-closing.

2. Category b—Less than 1-hour fire-resistance rating or not constructed in accordance with Section 708.4 of the International Building Code.

3. Category c—1-hour to less than 2-hour fire-resistance rating, with doors conforming to Section 716 of the International Building Code or without corridors as permitted by Section 1018 of the International Building Code.

4. Category d—2-hour or greater fire-resistance rating, with doors conforming to Section 716 of the International Building Code.

Evaluate the fire-resistance rating of exit enclosures, hoistways, escalator openings, and other shaft enclosures within the building, and openings between two or more floors. Table 1401.6.6(1) contains the appropriate protection values. Multiply that value by the construction-type factor found in Table 1401.6.6(2). Enter the vertical opening value and its sign (positive or negative) in Table 1401.7 under Safety Parameter 1401.6.6, Vertical Openings, for fire safety, means of egress, and general safety. If the structure is a one-story building or if all the unenclosed vertical openings within the building conform to the requirements of Section 713 of the International Building Code, enter a value of 2. The maximum positive value for this requirement shall be 2.

[B] TABLE 1401.6.6(1)
VERTICAL OPENING PROTECTION VALUE

PROTECTIONVALUE
None (unprotected opening)-2 times number of floors connected
Less than 1 hour-1 times number of floors connected
1 to less than 2 hours1
2 hours or more2

[B] TABLE 1401.6.6(2)
CONSTRUCTION-TYPE FACTOR

FACTORTYPE OF CONSTRUCTION
IAIBIIAIIBIIIAIIIBIVVAVB
1.21.52.23.52.53.52.33.37
The following formula shall be used in computing vertical opening value.
VO = PV × CF(Equation 14-5)
where:
VO=Vertical opening value.
PV=Protection value from Table 1401.6.6.(1).
CF=Construction-type factor from Table 1401.6.6.(2).
Evaluate the ability of the HVAC system to resist the movement of smoke and fire beyond the point of origin. Under the categories in Section 1401.6.7.1, determine the appropriate value and enter that value into Table 1401.7 under Safety Parameter 1401.6.7, HVAC Systems, for fire safety, means of egress, and general safety.
The categories for HVAC systems are:

1. Category a—Plenums not in accordance with Section 602 of the International Mechanical Code. -10 points.

2. Category b—Air movement in egress elements not in accordance with Section 1018.5 of the International Building Code. -5 points.

3. Category c—Both Categories a and b are applicable. -15 points.

4. Category d—Compliance of the HVAC system with Section 1018.5 of the International Building Code and Section 602 of the International Mechanical Code. 0 points.

5. Category e—Systems serving one story; or a central boiler/chiller system without ductwork connecting two or more stories. +5 points.

Evaluate the smoke detection capability based on the location and operation of automatic fire detectors in accordance with Section 907 of the International Building Code and the International Mechanical Code. Under the categories and occupancies in Table 1401.6.8, determine the appropriate value and enter that value into Table 1401.7 under Safety Parameter 1401.6.8, Automatic Fire Detection, for fire safety, means of egress, and general safety.

[B] TABLE 1401.6.8
AUTOMATIC FIRE DETECTION VALUES

OCCUPANCYCATEGORIES
abcde
A-1, A-3, F, M, R, S-1-10-5026
A-2-25-5059
A-4, B, E, S-2-4-2048
The categories for automatic fire detection are:

1. Category a—None.

2. Category b—Existing smoke detectors in HVAC systems and maintained in accordance with the International Fire Code.

3. Category c—Smoke detectors in HVAC systems. The detectors are installed in accordance with the requirements for new buildings in the International Mechanical Code.

4. Category d—Smoke detectors throughout all floor areas other than individual sleeping units, tenant spaces and dwelling units.

5. Category e—Smoke detectors installed throughout the floor area.

Evaluate the capability of the fire alarm system in accordance with Section 907 of the International Building Code. Under the categories and occupancies in Table 1401.6.9, determine the appropriate value and enter that value into Table 1401.7 under Safety Parameter 1401.6.9, Fire Alarm System, for fire safety, means of egress, and general safety.

[B] TABLE 1401.6.9
FIRE ALARM SYSTEM VALUES

OCCUPANCYCATEGORIES
abacd
A-1, A-2, A-3, A-4, B, E, R-10-505
F, M, S051015
a. For buildings equipped throughout with an automatic sprinkler system, add 2 points for activation by a sprinkler water-flow device.
The categories for fire alarm systems are:

1. Category a—None.

2. Category b—Fire alarm system with manual fire alarm boxes in accordance with Section 907.4 of the International Building Code and alarm notification appliances in accordance with Section 907.5.2 of the International Building Code.

3. Category c—Fire alarm system in accordance with Section 907 of the International Building Code.

4. Category d—Category c plus a required emergency voice/alarm communications system and a fire command station that conforms to Section 911 of the International Building Code and contains the emergency voice/alarm communications system controls, fire department communication system controls, and any other controls specified in Section 911 of the International Building Code where those systems are provided.

Evaluate the ability of a natural or mechanical venting, exhaust, or pressurization system to control the movement of smoke from a fire. Under the categories and occupancies in Table 1401.6.10, determine the appropriate value and enter that value into Table 1401.7 under Safety Parameter 1401.6.10, Smoke Control, for means of egress and general safety.

[B] TABLE 1401.6.10
SMOKE CONTROL VALUES

OCCUPANCYCATEGORIES
abcdef
A-1, A-2, A-3012366
A-4, E000135
B, M, R02a3a3a3a4a
F, S02a2a3a3a3a
a. This value shall be 0 if compliance with Category d or e in Section 1401.6.8.1 has not been obtained.
The categories for smoke control are:

1. Category a—None.

2. Category b—The building is equipped throughout with an automatic sprinkler system. Openngs are provided in exterior walls at the rate of 20 square feet (1.86 m2) per 50 linear feet (15 240 mm) of exterior wall in each story and distributed around the building perimeter at intervals not exceeding 50 feet (15 240 mm). Such openings shall be readily openable from the inside without a key or separate tool and shall be provided with ready access thereto. In lieu of operable openings, clearly and permanently marked tempered glass panels shall be used.

3. Category c—One enclosed exit stairway, with ready access thereto, from each occupied floor of the building. The stairway has operable exterior windows, and the building has openings in accordance with Category b.

4. Category d—One smokeproof enclosure and the building has openings in accordance with Category b.

5. Category e—The building is equipped throughout with an automatic sprinkler system. Each floor area is provided with a mechanical air-handling system designed to accomplish smoke containment. Return and exhaust air shall be moved directly to the outside without recirculation to other floor areas of the building under fire conditions. The system shall exhaust not less than six air changes per hour from the floor area. Supply air by mechanical means to the floor area is not required. Containment of smoke shall be considered as confining smoke to the floor area involved without migration to other floor areas. Any other tested and approved design that will adequately accomplish smoke containment is permitted.

6. Category f—Each stairway shall be one of the following: a smokeproof enclosure in accordance with Section 1022.10 of the International Building Code; pressurized in accordance with Section 909.20.5 of the International Building Code; or shall have operable exterior windows.

Evaluate the means of egress capacity and the number of exits available to the building occupants. In applying this section, the means of egress are required to conform to the following sections of the International Building Code: 1003.7, 1004, 1005.1, 1014.2, 1014.3, 1015.2, 1021, 1024.1, 1027.2, 1027.5, 1028.2, 1028.3, 1028.4 and 1029. The number of exits credited is the number that is available to each occupant of the area being evaluated. Existing fire escapes shall be accepted as a component in the means of egress when conforming to Section 405.
Under the categories and occupancies in Table 1401.6.11, determine the appropriate value and enter that value into Table 1401.7 under Safety Parameter 1401.6.11, Means of Egress Capacity, for means of egress and general safety.

[B] TABLE 1401.6.11
MEANS OF EGRESS VALUESa

OCCUPANCYCATEGORIES
abcde
A-1, A-2, A-3, A-4, E-1002810
M-30124
B, F, S-10000
R-30000
a. The values indicated are for buildings six stories or less in height. For buildings over six stories above grade plane, add an additional -10 points.
The categories for means-of-egress capacity and number of exits are:

1. Category a—Compliance with the minimum required means-of-egress capacity or number of exits is achieved through the use of a fire escape in accordance with Section 405.

2. Category b—Capacity of the means of egress complies with Section 1004 of the International Building Code, and the number of exits complies with the minimum number required by Section 1021 of the International Building Code.

3. Category c—Capacity of the means of egress is equal to or exceeds 125 percent of the required means-of-egress capacity, the means of egress complies with the minimum required width dimensions specified in the International Building Code, and the number of exits complies with the minimum number required by Section 1021 of the International Building Code.

4. Category d—The number of exits provided exceeds the number of exits required by Section 1021 of the International Building Code. Exits shall be located a distance apart from each other equal to not less than that specified in Section 1015.2 of the International Building Code.

5. Category e—The area being evaluated meets both Categories c and d.

In spaces required to be served by more than one means of egress, evaluate the length of the exit access travel path in which the building occupants are confined to a single path of travel. Under the categories and occupancies in Table 1401.6.12, determine the appropriate value and enter that value into Table 1401.7 under Safety Parameter 1401.6.12, Dead Ends, for means of egress and general safety.

[B] TABLE 1401.6.12
DEAD-END VALUES

OCCUPANCYCATEGORIESa
abc
A-1, A-3, A-4, B, F, M, R, S-202
A-2, E-202
a. For dead-end distances between categories, the dead-end value shall be obtained by linear interpolation.
The categories for dead ends are:

1. Category a—Dead end of 35 feet (10 670 mm) in nonsprinklered buildings or 70 feet (21 340 mm) in sprinklered buildings.

2. Category b—Dead end of 20 feet (6096 mm); or 50 feet (15 240 mm) in Group B in accordance with Section 1018.4, Exception 2, of the International Building Code.

3. Category c—No dead ends; or ratio of length to width (l/w) is less than 2.5:1.

Evaluate the length of exit access travel to an approved exit. Determine the appropriate points in accordance with the following equation and enter that value into Table 1401.7 under Safety Parameter 1401.6.13, Maximum Exit Access Travel Distance for means of egress and general safety. The maximum allowable exit access travel distance shall be determined in accordance with Section 1016.1 of the International Building Code.
(Equation 14-6)
Evaluate the passenger elevator equipment and controls that are available to the fire department to reach all occupied floors. Emergency recall and in-car operation of elevators shall be provided in accordance with the International Fire Code. Under the categories and occupancies in Table 1401.6.14, determine the appropriate value and enter that value into Table 1401.7 under Safety Parameter 1401.6.14, Elevator Control, for fire safety, means of egress and general safety. The values shall be zero for a single-story building.

[B] TABLE 1401.6.14
ELEVATOR CONTROL VALUES

ELEVATOR TRAVELCATEGORIES
abcd
Less than 25 feet of travel above or below the
primary level of elevator access for
emergency fire-fighting or rescue personnel
-200+2
Travel of 25 feet or more above or below the
primary level of elevator access for
emergency fire-fighting or rescue personnel
-4NP0+4
For SI: 1 foot = 304.8 mm.
NP = Not permitted.
The categories for elevator controls are:

1. Category a—No elevator.

2. Category b—Any elevator without Phase I emergency recall operation and Phase II emergency in-car operation.

3. Category c—All elevators with Phase I emergency recall operation and Phase II emergency in-car operation as required by the International Fire Code.

4. Category d—All meet Category c; or Category b where permitted to be without Phase I emergency recall operation and Phase II emergency in-car operation; and at least one elevator that complies with new construction requirements serves all occupied floors.

Evaluate the presence of and reliability of means-of-egress emergency lighting. Under the categories and occupancies in Table 1401.6.15, determine the appropriate value and enter that value into Table 1401.7 under Safety Parameter 1401.6.15, Means-of-Egress Emergency Lighting, for means of egress and general safety.

[B] TABLE 1401.6.15
MEANS-OF-EGRESS EMERGENCY LIGHTING VALUES

NUMBER OF EXITS REQUIRED BY
SECTION 1015 OF THE
INTERNATIONAL BUILDING CODE
CATEGORIES
abc
Two or more exitsNP04
Minimum of one exit011
NP = Not permitted.
The categories for means-of-egress emergency lighting are:

1. Category a—Means-of-egress lighting and exit signs not provided with emergency power in accordance with Section 2702 of the International Building Code.

2. Category b—Means-of-egress lighting and exit signs provided with emergency power in accordance with Section 2702 of the International Building Code.

3. Category c—Emergency power provided to means-of-egress lighting and exit signs, which provides protection in the event of power failure to the site or building.

Where a building has two or more occupancies that are not in the same occupancy classification, the separation between the mixed occupancies shall be evaluated in accordance with this section. Where there is no separation between the mixed occupancies or the separation between mixed occupancies does not qualify for any of the categories indicated in Section 1401.6.16.1, the building shall be evaluated as indicated in Section 1401.6, and the value for mixed occupancies shall be zero. Under the categories and occupancies in Table 1401.6.16, determine the appropriate value and enter that value into Table 1401.7 under Safety Parameter 1401.6.16, Mixed Occupancies, for fire safety and general safety. For buildings without mixed occupancies, the value shall be zero.

[B] TABLE 1401.6.16
MIXED OCCUPANCY VALUESa

OCCUPANCYCATEGORIES
abC
A-1, A-2, R-10010
A-3, A-4, B, E, F, M, S-505
a. For fire-resistance ratings between categories, the value shall be obtained by linear interpolation.
The categories for mixed occupancies are:

1. Category a—Occupancies separated by minimum 1-hour fire barriers or minimum 1-hour horizontal assemblies, or both.

2. Category b—Separations between occupancies in accordance with Section 508.4 of the International Building Code.

3. Category c—Separations between occupancies having a fire-resistance rating of not less than twice that required by Section 508.4 of the International Building Code.

Evaluate the ability to suppress a fire based on the installation of an automatic sprinkler system in accordance with Section 903.3.1.1 of the International Building Code. “Required sprinklers” shall be based on the requirements of this code. Under the categories and occupancies in Table 1401.6.17, determine the appropriate value and enter that value into Table 1401.7 under Safety Parameter 1401.6.17, Automatic Sprinklers, for fire safety, means of egress divided by 2, and general safety. High-rise buildings defined in Chapter 2 of the International Building Code that undergo a change of occupancy to Group R shall be equipped throughout with an automatic sprinkler system in accordance with Section 403 of the International Building Code and Chapter 9 of the International Building Code.

[B] TABLE 1401.6.17
SPRINKLER SYSTEM VALUES

OCCUPANCYCATEGORIES
aabacdef
A-1, A-3, F, M, R, S-1-6-30246
A-2-4-20124
A-4, B, E, S-2-12-603612
a. These options cannot be taken if Category a in Section 1401.6.18 is used.
The categories for automatic sprinkler system protection are:

1. Category a—Sprinklers are required throughout; sprinkler protection is not provided or the sprinkler system design is not adequate for the hazard protected in accordance with Section 903 of the International Building Code.

2. Category b—Sprinklers are required in a portion of the building; sprinkler protection is not provided or the sprinkler system design is not adequate for the hazard protected in accordance with Section 903 of the International Building Code.

3. Category c—Sprinklers are not required; none are provided.

4. Category d—Sprinklers are required in a portion of the building; sprinklers are provided in such portion; the system is one that complied with the code at the time of installation and is maintained and supervised in accordance with Section 903 of the International Building Code.

5. Category e—Sprinklers are required throughout; sprinklers are provided throughout in accordance with Chapter 9 of the International Building Code.

6. Category f—Sprinklers are not required throughout; sprinklers are provided throughout in accordance with Chapter 9 of the International Building Code.

Evaluate the ability to initiate attack on a fire by a making supply of water available readily through the installation of standpipes in accordance with Section 905 of the International Building Code. “Required Standpipes” shall be based on the requirements of the International Building Code. Under the categories and occupancies in Table 1401.6.18, determine the appropriate value and enter that value into Table 1401.7 under Safety Parameter 1401.6.18, Standpipes, for fire safety, means of egress, and general safety.

[B] TABLE 1401.6.18
STANDPIPE SYSTEM VALUES

OCCUPANCYCATEGORIES
aabcd
A-1, A-3, F, M, R, S-1-6046
A-2-4024
A-4, B, E, S-2-120612
a. This option cannot be taken if Category a or Category b in Section 1401.6.17 is used.
The categories for standpipe systems are:

1. Category a—Standpipes are required; standpipe is not provided or the standpipe system design is not in compliance with Section 905.3 of the International Building Code.

2. Category b—Standpipes are not required; none are provided.

3. Category c—Standpipes are required; standpipes are provided in accordance with Section 905 of the International Building Code.

4. Category d—Standpipes are not required; standpipes are provided in accordance with Section 905 of the International Building Code.

Evaluate the protection of incidental uses in accordance with Section 509.4.2 of the International Building Code. Do not include those where this code requires automatic sprinkler systems throughout the building including covered and open mall buildings, high-rise buildings, public garages and unlimited area buildings. Assign the lowest score from Table 1401.6.19 for the building or floor area being evaluated and enter that value into Table 1401.7 under Safety Parameter 1401.6.19, Incidental Uses, for fire safety, means of egress and general safety. If there are no specific occupancy areas in the building or floor area being evaluated, the value shall be zero.

[B] TABLE 1401.6.19
INCIDENTAL USE AREA VALUESa

PROTECTION REQUIRED
BY TABLE 508.2.5 OF THE
INTERNATIONAL BUILDING CODE
PROTECTION PROVIDED
None1 hourASAS with SP1 hour and
AS
2 hours2 hours and
AS
2 hours and AS-4-3-2-2-1-20
2 hours, or 1 hour and AS-3-2-1-1000
1 hour and AS-3-2-1-10-10
1 hour-10-1-1000
1 hour, or AS with SP-10-1-1000
AS with SP-1-1-1-10-10
1 hour or AS-1000000
a. AS = Automatic sprinkler system; SP = Smoke partitions (See IBC Section 508.2.2 ).
Note: For Table 1401.7, see page 74.
After determining the appropriate data from Section 1401.6, enter those data in Table 1401.7 and total the building score.

[B] TABLE 1401.7
SUMMARY SHEET-BUILDING CODE

Existing occupancy ________________________________________Proposed occupancy________________________________
Year building was constructed ________________________________Number of stories ____________ Height in feet _____________
Type of construction ________________________________________Area per floor___________________________________
Percentage of open perimeter increase______%
Completely suppressed:Yes ____ No ____Corridor wall rating___________________________________
Compartmentation:Yes ____ No ____Required door closers:Yes ______ No ______
Fire-resistance rating of vertical opening enclosures______________________________________________________________________
Type of HVAC system ___________________________________________ , serving number of floors_____________________________
Automatic fire detection:Yes _____ No _____Type and location____________________________________
Fire alarm system:Yes _____ No _____Type______________________________________________
Smoke control:Yes _____ No _____Type______________________________________________
Adequate exit routes:Yes _____ No _____Dead ends: _______________ Yes ______ No ______
Maximum exit access travel distance________________________Elevator controls:Yes ______ No ______
Means of egress emergency lighting: Yes ______ No ______Mixed occupancies:Yes ______ No ______
SAFETY PARAMETERSFIRE SAFETY (FS)MEANS OF EGRESS (ME)GENERAL SAFETY (GS)
1401.6.1 Building Height
1401.6.2 Building Area
1401.6.3 Compartmentation
1401.6.4 Tenant and Dwelling Unit Separations
1401.6.5 Corridor Walls
1401.6.6 Vertical Openings
1401.6.7 HVAC Systems
1401.6.8 Automatic Fire Detection
1401.6.9 Fire Alarm System
1401.6.10 Smoke control
1401.6.11 Means of Egress
1401.6.12 Dead ends
* * * *
* * * *
* * * *
1401.6.13 Maximum Exit Access Travel Distance
1401.6.14 Elevator Control
1401.6.15 Means of Egress Emergency Lighting
* * * *
* * * *
1401.6.16 Mixed Occupancies
1401.6.17 Automatic Sprinklers
1401.6.18 Standpipes
1401.6.19 Incidental Use
* * * *

÷2 =
Building score—total value
* * * *No applicable value to be inserted.
The values in Table 1401.8 are the required mandatory safety scores for the evaluation process listed in Section 1401.6.

[B] TABLE 1401.8
MANDATORY SAFETY SCORESa

OCCUPANCYFIRE SAFETY (MFS)MEANS OF
EGRESS (MME)
GENERAL SAFETY (MGS)
A-1203131
A-2213232
A-3223333
A-4, E294040
B304040
F243434
M234040
R213838
S-1192929
S-2293939
a.MFS=Mandatory Fire Safety
MME=Mandatory Means of Egress
MGS=Mandatory General Safety
The mandatory safety score in Table 1401.8 shall be subtracted from the building score in Table 1401.7 for each category. Where the final score for any category equals zero or more, the building is in compliance with the requirements of this section for that category. Where the final score for any category is less than zero, the building is not in compliance with the requirements of this section.

[B] TABLE 1401.9
EVALUATION FORMULASa

FORMULAT1401.7T1401.8SCOREPASSFAIL
FS - MFS ≥ 0______ (FS) –______ (MFS)=_____________________
ME – MME ≥ 0______ (ME)–______ (MME)=_____________________
GS – MGS ≥ 0______ (GS) –______ (MGS)=_____________________
a.FS = Fire SafetyMFS = Mandatory Fire Safety
ME = Means of EgressMME = Mandatory Means of Egress
GS = General SafetyMGS = Mandatory Means of Safety
For mixed occupancies, the following provisions shall apply:

1. Where the separation between mixed occupancies does not qualify for any category indicated in Section 1401.6.16, the mandatory safety scores for the occupancy with the lowest general safety score in Table 1401.8 shall be utilized. (See Section 1401.6.)

2. Where the separation between mixed occupancies qualifies for any category indicated in Section 1401.6.16, the mandatory safety scores for each occupancy shall be placed against the evaluation scores for the appropriate occupancy.

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