Code of Massachusetts Regulations
780 CMR - STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
Chapter 4 - Special Detailed Requirements Based on Use and Occupancy
Section 414 - HAZARDOUS MATERIALS
Subsection 414.2 - Control areas
Current through Register 1531, September 27, 2024
Control areas shall comply with Sections 414.2.1 through 414.2.5 and the International Fire Code. [F]
414.2.1 Construction requirements. Control areas shall be separated from each other by fire barriers constructed in accordance with Section 707 or horizontal assemblies constructed in accordance with Section 712, or both.
414.2.2 Percentage of maximum allowable quantities. The percentage of maximum allowable quantities of hazardous materials per control area permitted at each floor level within a building shall be in accordance with Table 414.2.2. [F]
TABLE 414.2.2 DESIGN AND NUMBER OF CONTROL AREAS [F]
| 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 | |
| Above grade plane | Higher than 9 | 5 | 1 | 2 |
| 7-9 | 5 | 2 | 2 | |
| 6 | 12.5 | 2 | 2 | |
| 5 | 12.5 | 2 | 2 | |
| 4 | 12.5 | 2 | 2 | |
| 3 | 50 | 2 | 1 | |
| 2 | 75 | 3 | 1 | |
| 1 | 100 | 4 | 1 | |
| Below grade plane | 1 | 75 | 3 | 1 |
| 2 | 50 | 2 | 1 | |
| Lower than 2 | Not Allowed | Not Allowed | Not Allowed | |
| a. 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 notes to those tables. b. Fire barriers shall include walls and floors as necessary to provide separation from other portions of the building. |
414.2.3 Number. The maximum number of control areas within a building shall be in accordance with Table 414.2.2. [F]
414.2.4 Fire-resistance-rating requirements. The required fire-resistance rating for fire barriers shall be in accordance with Table 414.2.2. The floor assembly of the control area and the construction supporting the floor of the control area shall have a minimum 2-hour fire-resistance rating.
Exception: The floor assembly of the control area and the construction supporting the floor of the control area are allowed to be 1-hour fire-resistance rated in buildings of Types IIA, IIIA and VA construction, provided that both of the following conditions exist:
414.2.5 Hazardous material in Group M display and storage areas and in Group S storage areas. The aggregate quantity of nonflammable solid and nonflammable or noncombustible liquid hazardous materials permitted within a single control area of a Group M display and storage area, a Group S storage area or an outdoor control area is permitted to exceed the maximum allowable quantities per control area specified in Tables 307.1(1) and 307.1(2) without classifying the building or use as a Group H occupancy, provided that the materials are displayed and stored in accordance with the International Fire Code and quantities do not exceed the maximum allowable specified in Table 414.2.5(1). [F]
In Group M occupancy wholesale and retail sales uses, indoor storage of flammable and combustible liquids shall not exceed the maximum allowable quantities per control area as indicated in Table 414.2.5(2), provided that the materials are displayed and stored in accordance with the International Fire Code.
The maximum quantity of aerosol products in Group M occupancy retail display areas, storage areas adjacent to retail display areas and retail storage areas shall be in accordance with the International Fire Code.
TABLE 414.2.5(1) MAXIMUM ALLOWABLE QUANTITY PER INDOOR AND OUTDOOR CONTROL AREA IN GROUP M AND S OCCUPANCIES NONFLAMMABLE SOLIDS AND NONFLAMMABLE AND NONCOMBUSTIBLE LIQUIDS d, e, f [F]
| CONDITION | MAXIMUM ALLOWABLE QUANTITY PER CONTROL AREA | ||
| Materiala | Class | Solids pounds | Liquids gallons |
| A. Health-hazard materials-nonflammable and noncombustible solids and liquids | |||
| 1. Corrosivesb, c | Not Applicable | 9,750 | 975 |
| 2. Highly toxics | Not Applicable | 20b, c | 2b, c |
| 3.Toxicsb, c | Not Applicable | 1,000 | 100 |
| B. Physical-hazard materials-nonflammable and noncombustible solids and liquids | |||
| 1. Oxidizersb, c | 4 | Not Allowed | Not Allowed |
| 3 | 1,150g | 115 | |
| 2 | 2,250h | 225 | |
| 1 | 18,000i, j | 1,800i, j | |
| 2. Unstable (reactives)b, c | 4 | Not Allowed | Not Allowed |
| 3 | 550 | 55 | |
| 2 | 1,150 | 115 | |
| 1 | Not Limited | Not Limited | |
| 3. Water (reactives) | 3b, c | 550 | 55 |
| 2b, c | 1,150 | 115 | |
| 1 | Not Limited | Not Limited | |
| For SI: 1 pound = 0.454 kg, 1 gallon = 3.785 L.
a. Hazard categories are as specified in the International Fire Code. b. Maximum allowable quantities shall be increased 100 percent in buildings that are sprinklered in accordance with Section 903.3.1.1. When Note c also applies, the increase for both notes shall be applied accumulatively. c. Maximum allowable quantities shall be increased 100 percent when stored in approved storage cabinets, in accordance with the International Fire Code. When Note b also applies, the increase for both notes shall be applied accumulatively. d. See Table 414.2.2 for design and number of control areas. e. Allowable quantities for other hazardous material categories shall be in accordance with Section 307. f. Maximum quantities shall be increased 100 percent in outdoor control areas. g. Maximum amounts are permitted to be increased to 2,250 pounds when individual packages are in the original sealed containers from the manufacturer or packager and do not exceed 10 pounds each. h. Maximum amounts are permitted to be increased to 4,500 pounds when individual packages are in the original sealed containers from the manufacturer or packager and do not exceed 10 pounds each. i. The permitted quantities shall not be limited in a building equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1. j. Quantities are unlimited in an outdoor control area. |
TABLE [F] 414.2.5(2) MAXIMUM ALLOWABLE QUANTITY OF FLAMMABLE AND COMBUSTIBLE LIQUIDS IN WHOLESALE AND RETAIL SALES OCCUPANCIES PER CONTROL AREAa
| TYPE OF LIQUID | MAXIMUM ALLOWABLE QUANTITY PER CONTROL AREA (gallons) | ||
| Sprinklered in accordance with Note b densities and arrangements | Sprinklered in accordance with Tables 3404.3.6.3(4) through 3404.3.6.3(8) and Table 3404.3.7.5.1 of the International Fire Code | Nonsprinklered | |
| Class IA | 60 | 60 | 30 |
| Class IB, IC, II and IIIA | 7,500c | 15,000c | 1,600 |
| Class IIIB | Unlimited | Unlimited | 13,200 |
| For SI: 1 foot = 304.8 mm, 1 square foot = 0.0929
m2, 1 gallon = 3.785 L, 1 gallon per minute per
square foot = 40.75 L/min/m2. a. Control areas shall be separated from each other by not less than a 1-hour fire barrier wall. b. To be considered as sprinklered, a building shall be equipped throughout with an approved automatic sprinkler system with a design providing minimum densities as follows: 1. For uncartoned commodities on shelves 6 feet or less in height where the ceiling height does not exceed 18 feet, quantities are those permitted with a minimum sprinkler design density of Ordinary Hazard Group 2. 2. For cartoned, palletized or racked commodities where storage is 4 feet 6 inches or less in height and where the ceiling height does not exceed 18 feet, quantities are those permitted with a minimum sprinkler design density of 0.21 gallon per minute per square foot over the most remote 1,500-square-foot area. c. Where wholesale and retail sales or storage areas exceed 50,000 square feet in area, the maximum allowable quantities are allowed to be increased by 2 percent for each 1,000 square feet of area in excess of 50,000 square feet, up to a maximum of 100 percent of the table amounts. A control area separation is not required. The cumulative amounts, including amounts attained by having an additional control area, shall not exceed 30,000 gallons. |
