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3806.2.1 Percentage of Maximum Allowable Quantities Per Control Area
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The percentage of maximum allowable quantities per control area of hazardous materials shall be in accordance with Table 3806.2.1.
DESIGN AND NUMBER OF CONTROL AREAS IN EXISTING SPRINKLERED LABORATORIES
| FLOOR LEVEL | PERCENTAGE OF THE MAXIMUM ALLOWABLE QUANTITY PER CONTROL AREAa |
NUMBER OF CONTROL AREAS PER FLOOR |
FIRE-RESISTANCE RATING FOR FIRE BARRIERS IN HOURSb, d |
|
| Above grade
plane
|
21+
|
5 | 1 | 2c |
|
11—20
|
10 | 1 | 2c | |
|
7—10
|
25 | 2 | 2c | |
|
4—6
|
50 | 2 | 2c | |
|
3
|
75 | 3 | 1 | |
|
1—2
|
100 | 4 | 1 | |
| Below grade
plane
|
1
|
100
|
3
|
1
|
|
2
|
75
|
2
|
1
|
|
|
Lower than 2
|
Not Allowed
|
Not Allowed
|
Not Allowed
|
|
- Percentages shall be of the maximum allowable quantity per control area shown in Tables 5003.1.1(1) and 5003.1.1(2), with all increases allowed in the footnotes to those tables.
- Fire barriers shall include walls, floors and ceilings necessary to provide separation from other portions of the building.
- Vertical fire barriers separating control areas from other spaces on the same floor are permitted to be 1-hour fire-resistance rated.
- See Section 414.2.4 of the International Building Code for additional requirements.
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