Where laboratory suites are provided, they shall be constructed in accordance with this section and Chapter 38 of the International Fire Code. The number of laboratory suites and percentage of maximum allowable quantities of hazardous materials in laboratory suites shall be in accordance with Table 428.3.
[F] TABLE 428.3
DESIGN AND NUMBER OF LABORATORY SUITES PER FLOOR
PERCENTAGE OF THE MAXIMUMALLOWABLE QUANTITY PER LAB SUITEa
NUMBER OFLAB SUITES PER FLOOR
|FIRE BARRIERS IN HOURSb|
|21+||Not allowed||Not Permitted||Not Permitted|
|Lower than 2||Not Allowed||Not Allowed||Not Allowed|
- Percentages shall be of the maximum allowable quantity per control area shown in Tables 307.1(1) and 307.1(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 laboratory suites from other spaces on the same floor shall be permitted to be 1-hour fire-resistance rated.
Exception: The floor assembly of the laboratory suites and the construction supporting the floor of the laboratory suites are allowed to be 1-hour fire-resistance rated in buildings of Types IIA, IIIA and VA construction, provided that the building is three or fewer stories.