Heads up: There are no suggested sections in this chapter.
Heads up: There are no amended sections in this chapter.
This chapter shall govern the manufacture, storage, handling and use of unstable (reactive) materials, except for the display and storage of unstable (reactive) materials in Group M and storage of unstable (reactive) materials in Group S occupancies complying with the requirements of FC2703.11.
Permits shall be required as set forth in FC105.6.
Unstable (reactive) materials shall be manufactured, stored, handled and used in accordance with this chapter. Unstable (reactive) materials that are compressed gases shall additionally comply with the requirements of FC Chapter 30.
It shall be unlawful to manufacture, store, handle and/or use detonable unstable (reactive) materials except as specifically authorized by FC Chapter 33.
The handling and use of unstable (reactive) materials in quantities requiring a permit shall be under the personal supervision of a certificate of fitness holder. The storage of unstable (reactive) materials in quantities requiring a permit shall be under the general supervision of a certificate of fitness holder.
The following term shall, for the purposes of this chapter and as used elsewhere in this code, have the meanings shown herein.

UNSTABLE (REACTIVE) MATERIAL. A material, other than an explosive, which in the pure state or as commercially produced, will vigorously polymerize, decompose, condense or become self-reactive and undergo other violent chemical changes, including explosion, when exposed to heat, friction or shock, or in the absence of an inhibitor, or in the presence of contaminants, or in contact with incompatible materials. Unstable (reactive) materials are classified as follows:

Class 1. Materials that in themselves are normally stable but which can become unstable at elevated temperatures and pressures.

Class 2. Materials that in themselves are normally unstable and readily undergo violent chemical change but do not detonate. This class includes materials that can undergo chemical change with rapid release of energy at normal temperatures and pressures, and that can undergo violent chemical change at elevated temperatures and pressures.

Class 3. Materials that in themselves are capable of detonation or of explosive decomposition or explosive reaction but which require a strong initiating source or which must be heated under confinement before initiation. This class includes materials that are sensitive to thermal or mechanical shock at elevated temperatures and pressures.

Class 4. Materials that in themselves are readily capable of detonation or explosive decomposition or explosive reaction at normal temperatures and pressures. This class includes materials that are sensitive to mechanical or localized thermal shock at normal temperatures and pressures.
The storage, handling and use of unstable (reactive) materials in amounts not exceeding the maximum allowable quantity per control area indicated in FC2703.1 shall be in accordance with FC 2701, 2703, 4301, 4303 and 4306.
It shall be unlawful to store, handle or use:
  1. Class 3 and 4 unstable (reactive) materials in Group A, E, I, R or U occupancies.
  2. Class 3 and 4 unstable (reactive) materials in offices in Group B, F, M or S occupancies, or any other areas of such occupancies that are accessible to the public.
Where two or more classes of unstable (reactive) materials are stored in immediate proximity to one another, such area shall be provided with hazard identification signs pursuant to FC Chapter 27 for the most severe class present.
Except as otherwise specifically provided in this code, where more than one class of unstable (reactive) materials is stored in the same control area, the maximum quantity allowed of each unstable (reactive) material shall be limited as follows: the maximum quantity shall be reduced by multiplying the maximum allowable quantity for each such material by the proportion that such material bears to the total quantity of unstable (reactive) material stored in the control area. The total of the proportional amounts shall not exceed 100 percent.
Where the required storage temperature range, as specified by the manufacturer, extends beyond normal ambient temperatures, high or low temperature limit switches, as applicable, shall be provided in addition to normal temperature controls. These limit switches shall activate an alarm in a supervised area to ensure reporting to the fire department.
Indoor storage of unstable (reactive) materials in amounts exceeding the maximum allowable quantity per control area indicated in FC Table 2703.1.1(1) shall be in accordance with FC 2701, 2703, 2704 and this chapter.
Indoor storage rooms, areas and buildings containing Class 3 or 4 unstable (reactive) materials shall be provided with explosion control in accordance with FC911 and the construction codes, including the Building Code.
In addition to FC2704.12, floors of storage areas for liquids and solids shall be of liquid-tight construction.
Unstable (reactive) materials stored in quantities greater than 500 cubic feet (14 m3) shall be separated into piles, each not larger than 500 cubic feet (14 m3). Aisle width shall not be less than the height of the piles or 4 feet (1219 mm), whichever is greater.

Exception: Materials stored in tanks.
Unstable (reactive) materials shall not be stored in basements or other areas below grade.
Smoke and heat venting shall be provided in accordance with FC910 and the construction codes, including the Building Code.
Outdoor storage of unstable (reactive) materials in amounts exceeding the maximum allowable quantities per control area indicated in FC Table 2703.1.1(3) shall be in accordance with FC 2701, 2703, 2704 and this chapter.
Outdoor storage of Class 3 (detonable) or 4 unstable (reactive) material shall be in accordance with FC Table 3304.5.2(3). The number of pounds of material listed in the table shall be the net weight of the material present. Alternatively, the number of pounds of material shall be based on a trinitrotoluene (TNT) equivalent weight.
Outdoor storage of deflagratable Class 3 unstable (reactive) materials shall be in accordance with FC Table 3304.5.2(4). The number of pounds of material listed shall be the net weight of the material present.
Outdoor storage of Class 1 or 2 unstable (reactive) materials shall not be within 20 feet (6096 mm) of buildings not associated with the manufacture or distribution of such materials, lot lines, public streets, private roads or means of egress. The minimum required distance shall not apply when fire barriers that have no openings or penetrations and have a minimum fire-resistance rating of 2 hours interrupt the line of sight between the storage and the exposure. The fire barrier shall either be an independent structure, or the exterior wall of the building adjacent to the storage area.
Piles of unstable (reactive) materials shall not exceed 1,000 cubic feet (28 m3).
Aisle widths between piles shall not be less than one-half the height of the pile or 10 feet (3048 mm), whichever is greater.
Unstable (reactive) materials in amounts exceeding the maximum allowable quantity per control area indicated in FC Table 2703.1.1(1) or 2703.1.1(3) shall be handled and used in accordance with FC 2701, 2703, 2705 and this chapter.
Unstable (reactive) material classified as a Class IV material as defined in Section 42-272 of the Zoning Resolution may be utilized in manufacturing processes or other production in manufacturing districts only when authorized by a special permit pursuant to Section 42-276 of the Zoning Resolution.
It shall be unlawful to store unstable (reactive) material classified as a Class IV material as defined in Section 42-272 of the Zoning Resolution, except that accessory storage authorized by a special permit pursuant to Section 42-276 of the Zoning Resolution shall be allowed.
Analyzing code differences
Tool Palette
Code Compare
P
Code compare is not available for this code.
Amendment Styling
P
Amendment styling is not available for this code.
Customized Codebook
P
P Premium Feature

This feature is included in the premium subscription. Visit the feature page to learn more.

Start Free Trial
Text Size
?
Bookmarks
P
P Premium Feature

This feature is included in the premium subscription. Visit the feature page to learn more.

Start Free Trial
History
P
P Premium Feature

This feature is included in the premium subscription. Visit the feature page to learn more.

Start Free Trial
Linked Resources
P
P Premium Feature

This feature is included in the premium subscription. Visit the feature page to learn more.

Start Free Trial
Bookmarks
History
Linked Resources

Log in to your premium account or sign up to see history
Simplify coordination.

Bookmark frequently used and relevant sections to your project. Drop in comments to help expand the code and communicate with your team.

START 2 WEEK FREE TRIAL LEARN MORE

Bookmarks & comments
Project Pages
Collaborative research
Project Page exports
MULTIPLE USERS

It’s easy to get your office on board with Team licenses. Visit pricing to learn more.