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The evaluation process specified herein shall be followed in its entirety to evaluate existing buildings. Table 3412.7 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 3412.6.16, 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 mixed occupancies qualifies for any category indicated in Section 3412.6.16, the score for each occupancy shall apply to each portion of the building based on the occupancy of the space.
3412.6.1 Building Height
The value for building height shall be the lesser value determined by the formula in Section 3412.6.1.1. Chapter 5 shall be used to determine the allowable height of the building, including allowable increases due to automatic sprinklers as provided for in Section 504.2. Subtract the actual building height in feet from the allowable and divide by 121/2 feet. Enter the height value and its sign (positive or negative) in Table 3412.7 under Safety Parameter 3412.6.1, Building Height, for fire safety, means of egress and general safety. The maximum score for a building shall be 10.
3412.6.1.1 Height Formula
The following formulas shall be used in computing the building height value.

(Equation 34-1)
(Equation 34-2)
where:
AH = Allowable height in feet from Table 503.
EBH = Existing building height in feet.
AS = Allowable height in stories from Table 503.
EBS = Existing building height in stories.
CF = 1 if (AH) — (EBH) is positive.
CF = Construction-type factor shown in Table
3412.6.6(2) if (AH) — (EBH) is negative.
Note: Where mixed occupancies are separated and individually evaluated as indicated in Section 3412.6, the values AH, AS, EBH and EBS shall be based on the height of the occupancy being evaluated.
3412.6.2 Building Area
The value for building area shall be determined by the formula in Section 3412.6.2.2. Section 503 and the formula in Section 3412.6.2.1 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. Subtract the actual building area in square feet from the allowable area and divide by 1,200 square feet. Enter the area value and its sign (positive or negative) in Table 3412.7 under Safety Parameter 3412.6.2, 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 3412.8, Mandatory Safety Scores.
3412.6.2.1 Allowable Area Formula
The following formula shall be used in computing allowable area:

(Equation 34-3)
where:
Aa = Allowable building area per story (square feet).
At = Tabular building area per story in accordance
with Table 503 (square feet).
Is = Area increase factor due to sprinkler protection as
calculated in accordance with Section 506.3.
If = Area increase factor due to for frontage as
calculated in accordance with Section 506.2.
3412.6.2.2 Area Formula
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 34-4)
where:
i=Value for an individual separated occupancy on a floor.
n=Number of separated occupancies on a floor.
3412.6.3 Compartmentation
Evaluate the compartments created by fire barriers or horizontal assemblies which comply with Sections 3412.6.3.1 and 3412.6.3.2 and which are exclusive of the wall elements considered under Sections 3412.6.4 and 3412.6.5. Conforming compartments shall be figured as the net area and do not include shafts, chases, stairways, walls or columns. Using Table 3412.6.3, determine the appropriate compartmentation value (CV) and enter that value into Table 3412.7 under Safety Parameter 3412.6.3, Compartmentation, for fire safety, means of egress and general safety.

TABLE 3412.6.3
COMPARTMENTATION VALUES
OCCUPANCY CATEGORIESa
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-3
0
6
10
14
18
A-2
0
4
10
14
18
A-4, B, E, S-2
0
5
10
15
20
F, M, R, S-1
0
4
10
16
22
For SI: 1 square foot = 0.093 m2.
  1. For areas between categories, the compartmentation value shall be obtained by linear interpolation.
3412.6.3.1 Wall Construction
A wall used to create separate compartments shall be a fire barrier conforming to Section 707 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. 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.
3412.6.3.2 Floor/Ceiling Construction
A floor/ceiling assembly used to create compartments shall conform to Section 711 and shall have a fire-resistance rating of not less than 2 hours.
3412.6.4 Tenant and Dwelling Unit Separations
Evaluate the fire-resistance rating of floors and walls separating tenants, including dwelling units, and not evaluated under Sections 3412.6.3 and 3412.6.5. Under the categories and occupancies in Table 3412.6.4, determine the appropriate value and enter that value in Table 3412.7 under Safety Parameter 3412.6.4, Tenant and Dwelling Unit Separations, for fire safety, means of egress and general safety.
TABLE 3412.6.4
SEPARATION VALUES
OCCUPANCY CATEGORIES
a b c d e
A-1
0
0
0
0
1
A-2
-5
-3
0
1
3
A-3, A-4, B, E, F, M, S-1
-4
-3
0
2
4
R
-4
-2
0
2
4
S-2
-5
-2
0
2
4
3412.6.4.1 Categories
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 a 1-hour fire-resistance rating or not constructed in accordance with Sections 708 or 711.
  3. Category c—Fire partitions with a 1-hour or greater fire-resistance rating constructed in accordance with Section 708 and floor assemblies with a 1-hour but less than 2-hour fire-resistance rating constructed in accordance with Section 711, or with only one tenant within the floor area.
  4. Category d—Fire barriers with a 1-hour but less than 2-hour fire-resistance rating constructed in accordance with Section 707 and floor assemblies with a 2-hour or greater fire-resistance rating constructed in accordance with Section 711.
  5. Category e—Fire barriers and floor assemblies with a 2-hour or greater fire-resistance rating and constructed in accordance with Sections 707 and 711, respectively.
3412.6.5 Corridor Walls
Evaluate the fire-resistance rating and degree of completeness of walls which create corridors serving the floor, and constructed in accordance with Section 1018. This evaluation shall not include the wall elements considered under Sections 3412.6.3 and 3412.6.4. Under the categories and groups in Table 3412.6.5, determine the appropriate value and enter that value into Table 3412.7 under Safety Parameter 3412.6.5, Corridor Walls, for fire safety, means of egress and general safety.

TABLE 3412.6.5
CORRIDOR WALL VALUES
OCCUPANCY CATEGORIES
a b ca da
A-1 -10 -4 0 2
A-2 -30 -12 0 2
A-3, F, M, R, S-1 -7 -3 0 2
A-4, B, E, S-2 -5 -2 0 5
  1. Corridors not providing at least one-half the travel distance for all occupants on a floor shall be category b.
3412.6.5.1 Categories
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.
  3. Category c—1-hour to less than 2-hour fire-resistance rating, with doors conforming to Section 716 or without corridors as permitted by Section 1018.
  4. Category d—2-hour or greater fire-resistance rating, with doors conforming to Section 716.
3412.6.6 Vertical Openings
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 3412.6.6(1) contains the appropriate protection values. Multiply that value by the construction type factor found in Table 3412.6.6(2). Enter the vertical opening value and its sign (positive or negative) in Table 3412.7 under Safety Parameter 3412.6.6, 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 712, enter a value of 2. The maximum positive value for this requirement shall be 2.
TABLE 3412.6.6(1)
VERTICAL OPENING PROTECTION VALUE
PROTECTION VALUE
None
(unprotected opening)
-2 times number floors connected
Less than 1 hour -1 times number floors connected
1 to less than 2 hours 1
2 hours or more 2


TABLE 3412.6.6(2)
CONSTRUCTION-TYPE FACTOR
FACTOR TYPE OF CONSTRUCTION
IA IB IIA IIB IIIA IIIB IV VA VB
1.2 1.5 2.2 3.5 2.5 3.5 2.3 3.3 7
3412.6.6.1 Vertical Opening Formula
The following formula shall be used in computing vertical opening value.

(Equation 34-5)
where:
VO = Vertical opening value.
PV = Protection value [Table 3412.6.6(1)].
CF = Construction type factor [Table 3412.6.6(2)].
3412.6.7 HVAC Systems
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 3412.6.7.1, determine the appropriate value and enter that value into Table 3412.7 under Safety Parameter 3412.6.7, HVAC Systems, for fire safety, means of egress and general safety.
3412.6.7.1 Categories
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. -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 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.
3412.6.8 Automatic Fire Detection
Evaluate the smoke detection capability based on the location and operation of automatic fire detectors in accordance with Section 907 and the International Mechanical Code. Under the categories and occupancies in Table 3412.6.8, determine the appropriate value and enter that value into Table 3412.7 under Safety Parameter 3412.6.8, Automatic Fire Detection, for fire safety, means of egress and general safety.

TABLE 3412.6.8
AUTOMATIC FIRE DETECTION VALUES
OCCUPANCY CATEGORIES
a b c d e
A-1, A-3, F, M, R, S-1 -10 -5 0 2 6
A-2 -25 -5 0 5 9
A-4, B, E, S-2 -4 -2 0 4 8
3412.6.8.1 Categories
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.
3412.6.9 Fire Alarm Systems
Evaluate the capability of the fire alarm system in accordance with Section 907. Under the categories and occupancies in Table 3412.6.9, determine the appropriate value and enter that value into Table 3412.7 under Safety Parameter 3412.6.9, Fire Alarm Systems, for fire safety, means of egress and general safety.
TABLE 3412.6.9
FIRE ALARM SYSTEM VALUES
OCCUPANCY CATEGORIES
a
ba
c
d
A-1, A-2, A-3, A-4, B, E, R
-10
-5
0
5
F, M, S
0
5
10
15
  1. For buildings equipped throughout with an automatic sprinkler system, add 2 points for activation by a sprinkler waterflow device.
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