osha 1910 guardrail. 29 and a fixed guardrail system that leaves only one exposed side. osha 1910 guardrail

 
29 and a fixed guardrail system that leaves only one exposed sideosha 1910 guardrail 1910

OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION 8 OSHA Standards Frequently Cited During FY 2013 Inspections of Roofing Contractors (NAICS 238160) Rank by Number of Citations Issued Categories Standard 9 Ladder training requirements 1926. The employer may use a designated area when performing. S. 23(e)(1) Result(s) Document Type(s) 1 : Directives: 1 : Regulations: 5 : Standard Interpretations: Display all referenced documents. OSHA regulations 29 CFR 1926. 502(g)(l)(iv) requires that the control line be connected on each side to a guardrail system or wall. • Maximum arresting force of 1,800 lbs. They need to be able to withstand a force of at least 200 pounds (90. 502(k) and training that meets the requirements of 29 CFR 1926. 23(e)(1), which otherwise requires a nominal vertical height of 42 inches. This provision allows that employers are not required to provide. Same with roof hatches. Table of Contents I. ( c) Safety net systems. Loren Sweatt, Principal Deputy Assistant Secretary of Labor for Occupational Safety and Health. RIN 1218-AA66 [Docket No. 1910. Anchorage. The top edge height of top rails are 42 inches, plus or minus 3 inches, above the walking surface. 28(b)(1)(i), in general workplaces, employers must ensure that any employee working on a surface with an unprotected side or edge that is four feet (1. OSHA also references documents in the following dockets, which the Agency incorporates by reference into this rulemaking: 1990 proposed rule on Walking and Working Surfaces (29 CFR 1910, subpart D)--Docket No. 774. 6 m) from the roof edge, the employer must ensure each employee is protected from falling by a guardrail system, safety net system, travel restraint system, or personal fall arrest system. 23(e)(2) and 1910. 1917. To be OSHA compliant, they must be 42 inches (1. [29 CFR 1926. 1910. See OSHA 1910. Walking-Working Surfaces and Personal Fall Protection Systems Final Rule Frequently Asked Questions. 1910. 1926. 178 Powered Industrial Trucks (p. OSHA Guardrail Dimensions. 1[This document was edited on 12/5/12 to strike information that no longer reflects current OSHA policy. 28 (b) (13): “When work is performed less than 6 feet (1. safety monitoring systems. 07 m), with a tolerance of plus or minus 3 inches (7. Calculating Safe Mounting Distances for Safeguards | EHS Today. Guardrails should be inspected per the manufacturer specifications or a qualified person’s requirements. See solutions to OSHA requirements. “Safety Rail Company manufactures the SRC360 Mobile Rail: a free-standing, non-penetrating railing system that complies with OSHA 1910. Use of personnel platform. View safetymanuals’s profile on Facebook. The top edge height may exceed 45 inches (114 cm), provided the guardrail system meets all other criteria of paragraph (b) of this section. OSHA observes that the proposed provision was framed in performance-oriented. 29(b) has an entire section devoted solely to the guardrail system. Therefore, if your stair railings are 30-34" as specified in §1910. Requirements for suspension scaffold fall protection systems are contained in § 1910. 59 which refers to 1910. 2 m) above dangerous equipment is protected from falling into or onto the dangerous equipment by a guardrail system or a travel restraint system, unless the equipment is covered or guarded to eliminate the hazard. According to OSHA standard 1910. The present Standard, 29 CFR 1910. 212 ), OSHA. 29(b)(13): “When guardrail systems are used around holes that serve as points of access (such as ladderways), the guardrail system. General requirements —. [29 CFR 1926. 64 cm) for each additional 2 feet. The employer must ensure guardrail systems meet the following requirements: 1910. Guardrails should be inspected per the manufacturer specifications or a qualified person’s requirements. 29(f)(1)(iii)(A), stair rail systems can also serve as a handrail but require the top rail to be not more than 38 inches in. 502 requirements when making a U-shape. Only 33 percent of scaffolds were equipped with a guardrail. 1 - Purpose and scope. Top 10 standards cited as “serious,” fiscal year 2022. Bagman is correct, I think, the below is copied from the OSHA website. Panels with 151 to 600 volts should have 42. Rail systems on remote trail bridges must be at least 42 inches1926. Body belt (safety belt) means a strap with means both for securing it about the waist and for attaching it to a lanyard, lifeline, or deceleration device. To meet OSHA roof fall protection requirements in the construction industry, employers must provide fall protection for roofers whenever they work at heights of six feet or more above a lower level. OSHA 1910 Occupational Safety and Health Standards > D Walking-Working Surfaces > 1910. , holes located in aisle spaces), the employer may protect employees from falling into the hole by using a hinged floor hole cover that meets the criteria in §1910. Under the proposal [proposed §1910. 1910. This is the first OSHA requirement to be aware of. 1910. Section 1926. Dear Mr. 28 and 1910. If you need further assistance, please contact [the Office of General Industry Enforcement at (202) 693-1850]. Under 1910. In addition, if the guardrail has intermediate vertical members (uprights. 1910. 23(c)(1) as it relates to guardrails on loading rack platforms. A secured designated area in lieu of conventional fall protection is acceptable as long as the work is both “infrequent and temporary”OSHA 1910. 23 requires that the exposed sides of openings in floors have some form of guardrail protection. 23: General requirements for all laddersStandard Interpretations are letters or memos written in response to public inquiries or field office inquiries regarding how some aspect of or terminology in an OSHA standard or regulation is to be interpreted and enforced by the Agency. Section 1910. 1910. 1926. (ii) – A guardrail system or handrails are not required when:An elevated track system which is located four feet (1. 26 (a) Dockboards are capable of supporting the maximum intended load in accordance with § 1910. OSHA Fact Sheet (Publication 3722), (April 2014). All other guardrail systems and their components shall meet the following criteria: (1) Top rails. 651 (d) Exposure to vehicular traffic. For Landscape and Horticultural Services, use NAICS code 561730 in the NAICS search box. 28 (b) (13) (ii) When work is performed at least 6 feet (1. Reply: OSHA's standard at 29 CFR 1910. However, in 1976, OSHA published a proposed revision to Part 1910, Subparts D and I, allowing the use of alternate fall protection, which would include the use of personal fall protection, with the caveat where the use of guardrails is not feasible. 1910. Subpart B Adoption and Extension of Established Federal Standards. As defined by OSHA: A “serious” violation is “one in which there is a substantial probability that death or serious physical harm could result, and the employer knew or should have known of the hazard. All ErectaStep stairs comply with OSHA standard 1910. Contains information that helps workers identify and control the hazards that cause the. 29 and their roof guardrail requirements, we've identified at least 4 areas of major concern for rooftop safety that would require a safety rail for roof system. Handrails, stair rail systems, and guardrail systems are provided in accordance with § 1910. weight 390 lbs ; APS Resource warrants this product will be free from defects and workmanship under normal use for (1) year ;This responds to your June 1, 1999, letter to the Occupational Safety and Health Administration (OSHA), requesting information on wire rope and Crosby clips used around the perimeter of buildings as a guardrail. SUBJECT: 1926. 29 (b) (3) (4) (5). Toeboards are installed at the base of guardrails to protect from objects falling from between the guardrail posts. The manufacturer must approve any alterations to the stilts. The employer may use a designated area when performing. Some of the ladder sections are less than 24 feet in length. 28(c)(2)(ii) and (iv)], for new installation the height of a handrail shall be not less than 36 inches above the tread. ] General Industry - Fall Protection When performing HVAC maintenance on roofs, 1 OSHA's general industry standard §1910. OSHA 29 CFR 1910. ". The employer must ensure guardrail systems meet the following requirements: 1910. The standard prohibits using repaired wire. Question 9: What training is required for fall protection and associated rescue under §1910. > >. 44 FR 8577, Feb. 29 (b) (1) requirement, the top rail of a guardrail must be 42 inches, plus or minus 3 inches, above the walking-working surface. 1926. 23 (e) (3) (iii), installations, posts and top and intermediate rails are to be of 2-inch by 2-inch by 3/8-inch angles or other metal shapes of equivalent bending strength with posts spaced not more than 8 feet on centers. 5" tall, with no more than a 1/4" gap at the bottom. Per OSHA 1910. These letters provide guidance to clarify the application of an established OSHA standard, policy, or. Open riser:. 29 CFR 1910. 25 - Stairways, we see that (1910. 1910 Subpart E - Exit Routes and Emergency Planning. 5 million construction workers then covered by subpart L) to support the 1986 proposal for subpart L, based on a review of accident data prepared by the Bureau of Labor Statistics (BLS) (Ex. 503(a) and (c). 29(b)), and contain a. 1 (888) 527-2278 When OSHA Requires Guardrail 1910. 500 (f) (l) (vi) provides for the utilization of types, sizes and arrangements of railing construction provided they meet the conditions established in sub-paragraph a thru d. 23 (a) (4), therefore, requires that skylights in the roof of buildings through which persons may fall while walking or working shall be guarded by a standard. This product also works with the SkyCage Post (#70812) for pedestrian. Display all referenced documents. (ii) Each employee is protected from tripping. 3 October 30, 1978. 1423 (b) (2) Boom walkway criteria. 7225 F 803. 72 kg) applied within 2 inches (5. This engineered fall-protection system ranks high in OSHA’s hierarchy of controls when addressing fall. This section stipulates, in full detail, how guardrails and other safety barriers should be designed, installed, inspected, tested, and maintained in a manner that will prevent employees from falling. 28(b)(3)(v): “Each employee is protected from falling through a hatchway and chute-floor hole by: A hinged floor-hole cover and a fixed guardrail system. (1910. Balusters – OSHA 1910. Scroll to Top. 252, General requirements. Handrails and the top rails of stair rail systems are capable of withstanding, without failure, a force of at least 200 pounds (890 N) applied in any downward or outward direction within 2 inches (5 cm) of any point along the top edge of the rail. 1910. 1910. 29(b) Guardrail systems. These letters provide guidance to clarify the application of an established OSHA standard, policy, or procedure, but they may not, in themselves, establish or revise OSHA policy or procedure or interpret the OSH Act. We will now cover some additional areas. The attachment point may be located in the pre-sternal position if the free fall distance is limited to 2 feet (0. (i. This section applies to establishments where pulp, paper, and paperboard are manufactured and converted. If a climber safety rail is not installed, use a double lanyard configuration. 1910. 22 m) or more in depth so as to require no more than 25 feet (7. EAST (980) 272-1567. • Mid rails half way between top rail and staging, working. In addition, be aware that ladders are also require on scaffolding. Final Regulatory Text For the reasons set forth in the preamble, OSHA amends part 1910 of title 29 of the Code of Federal Regulations as follows: PART 1910--OCCUPATIONAL SAFETY AND HEALTH STANDARDS Subpart D--Walking-Working Surfaces 1. OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION 6A Guide to OSHA Rules This informational booklet provides a general overview of a particular topic related to OSHA standards. 1431 (b) (1) When using equipment to hoist employees, the employees must be in a personnel platform that meets the requirements of paragraph (e) of this section. 29 (b) (1): The top edge height of top rails, or equivalent guardrail system members, are 42. Provides illustrated safety checklists for specific types of scaffolds. 29(f)(1) Handrails and stair rail systems; Height criteria, OSHA did not intend for any of the “grandfathered” stair rail systems that had a top rail height between 30 and 38 inches to need to be modified if the stair rail system was installed before January 17, 2017, and it complied with the previous rule. ” (Standard. 22 General Requirements . No other options are provided by OSHA. 1910. 151, Medical Aid, the. Wall and Roof Openings; Stairs and Guardrail Systems. 502(b) RailGuard GC is designed to meet the specific needs of the construction industry. OSHA Guardrail Dimensions. If you need additional information, please contact us by fax at: U. Occupational Safety and Health Administration 200 Constitution Ave NW According to OSHA guardrail requirements, a railing is required when working at 4 feet or more. Department of Labor. 1431 (b) (2) Exceptions: A personnel platform is not required for hoisting employees: 1926. OSHA Instruction STD 3-10. OSHA 1910. Meets OSHA Requirements 1910. 1910. 1. 1926. OSHA Code 1910. For safety, the rail accommodates signs, flags or lights, and for convenience, it can be used with a guard rail tent, umbrellas or winch (PN 9401 only). A catwalk handrail or guardrail system is required for any catwalks higher than 4′ above a lower level. 27, depending on the type of ladder used to access the scaffolding. or employing a pump station such as those described in the literature provided would negate the application of the 1910. 29 – Manually Propelled Mobile Ladder Stands and Scaffolds (Towers) • 1910. gov; USA. This Safety and Health Information Bulletin is not a standard or regulation, and it creates no new legal obligations. 2 - Definitions. Watertown, SD 57201-3624. 20(b) – Accident prevention responsibilities; 1926. Download the OSHA cheatsheet. In general, any electrical panel that has 0 to 150 volts going through it needs to have at least 36’’ of clearance around it. Remote and Low-Risk Areas (OSHA–based) The Occupational Safety and Health Administration (OSHA) refers to rail systems as standard railings. 1910. 29(b) has an entire section devoted solely to the guardrail system. 23. 21). Occupational Safety and Health Administration 200 Constitution Ave NW Washington, DC 20210 1-800. 1926. ( c) Safety net systems. We hope you find this information helpful. In the same. 2023. 29 and OSHA 29 CFR 1926. Subpart A General. Please note that in view of a decision of the Occupational Safety and Health Review. 29(g)(4)), have an acceptable guardrail system (29 CFR § 1910. 1910. 23 (b) for loading docks used as such. 29 (b) defines the requirements that all guardrails need to comply with to meet the minimum. . 23, Guarding floor and wall openings and holes. 1910. The following is an excerpt from OSHA 1910. 28; 1910. 93)OSHA stipulates that employers are responsible for reviewing safety regulations before basket lifting starts as well as notifying/training new workers on safety regulations whenever they join a job location. 262 (b) (2) Belt shifter lock. Display all referenced documents. Content 1910. 8 m) or more above a lower level shall be protected from falling by the use of guardrail systems, safety net systems, or personal fall arrest systems. weight 370 lbs ; 9’ Door, Est. 140. • Shall stop the fallOSHA – 29CFR 1910 Subpart D – Walking-Working Surfaces . Here are the highlighted rules of OSHA’s scaffolding standard: 1. 30. For example, in 29 CFR 1910. Federal OSHA: requires a 200 pound point load. 1910. 1910. 1926. 1 m) plus or minus 3 inches (8 cm) above the walking/working level. 30. That being said, there are no requirements for a fall arrest system or ladder safety system for offset fixed ladders 24 feet and under in height so long as the ladder resting platforms at all transitions are of minimum horizontal dimensions (29 CFR § 1910. OSHA 1910. 140 (d)1910. S. S. 9. 134 Respiratory Protection (p. ”Updated scaffold requirements (§1910. 8 m) or more above a lower level shall be protected from falling by the use of guardrail systems, safety net systems, or personal fall arrest systems. 28(b)(9)(iii)(B) requires that ladder sections, which have a cage or a well, have landing platforms at maximum intervals of 50. (i) Each employee exposed to an unprotected side or edge of a stairway landing that is 4 feet (1. KeeGuard ® Rooftop Railing was invented by Kee Safety decades ago and is installed on rooftops around the world. 29, qualifying as a passive barrier between the worker and the fall hazard. 28(b)(1)(i): Except as provided elsewhere in this section 29 CFR 1910. 22 (b); 1910. 28 meet standards for protection from falls and falling objects around walking-working surfaces. 23(c)(1), the open sides of platforms more than four feet above an adjacent floor or ground level must be guarded by a standard railing or the equivalent. " - 1910. Employers. 1910. 30 and 1910. The OSHA Outreach Training Program provides workers with basic and more advanced training about common safety and health hazards on the job. A stairway, ladder, ramp or other safe means of egress shall be located in trench excavations that are 4 feet (1. 1926. Guardrail system means a barrier erected along an unprotected or exposed side, edge, or other area of a walking-working surface to prevent. 2 m) or more above a lower level by one or more of the following: (A) Covers; (B) Guardrail systems; (C) Travel restraint systems; or (D) Personal fall arrest systems. To review the complete standard, follow this link- Click Here. Weighted bases allow you to install these railings without drilling holes. rail system, safety net system, or per-sonal fall arrest system. 25 which covers all stairways including standard, spiral, ship, and alternating tread-type stairs. Guardrail systems: Guardrails should be placed around edges or openings where workers could fall. (877) 723-3766 . 1. To prevent employees from being injured from falls, employers must: Guard every floor hole into which a worker can accidentally walk (using a railing and toe-board or a floor hole cover). ( d) Designated areas. 451, ANSI/ASSP A10. 261 (a) (2) Standards incorporated by reference. (c) Safety net systems. 68 (b) (6) (v) (b) Emergency landings shall be completely enclosed with a standard railing and toeboard. Hole means a gap or void 2 inches (5. The top edge height may exceed 45 inches (114 cm), provided the guardrail system meets all other criteria of paragraph (b) of this section. Refrigerated trucks are 50 to 60 inches in bed height, so they always will require a guardrail. 500(a)(2) and 29 CFR 1926. Be sure you have checked all 10 before work begins on your job. " Full text of this standard is available online at It states that, "every ladder-way, floor opening, or platform shall be guarded by a standard railing with standard toe. 844. If the top of a tank is not a "platform" under the analysis called for in OSHA's guidance document, the guardrail requirements of that standard would not apply. (3) Hoist areas. With respect to Sec. 555 (a) (7)Unless otherwise provided in this section, aerial devices (aerial lifts) acquired on or after July 1, 1975, shall be designed and constructed in conformance with the applicable requirements of the American National Standard for "Vehicle Mounted Elevating and Rotating Work Platforms," ANSI A92. 1910. 6 m) from the roof edge, the employer must ensure each employee is protected from falling, by a guardrail system. When the hinged cover for an opening is left up, there are sides exposed which must be appropriately protected. 29 (ii) The height of stair rail systems meets the following: (A) The height of stair rail systems installed before January 17, 2017 is notIn most states, you will find that rooftop units need to adhere to OSHA standards as they are generally considered “exceptions,” and do not need to meet the same requirements. 1910. 23(d)(5): For through ladders, the steps or rungs are omitted from the extensions,. Whereas a handrail is a handhold for support. 146. Regarding roof protection from falls for work on low-slope roofs, OSHA has general industry (1910) regulations based on various distances: Work done less than 6 feet from the roof edge: 29 CFR 1910. Safety Rail Source. This code (OSHA 1910. 451(g)(4. 2 m) or more above a lower level is protected from falling by…guardrail systemsOSHA Standard Number 1910. [ref. Standard Interpretations are letters or memos written in response to public inquiries or field office inquiries regarding how some aspect of or terminology in an OSHA standard or regulation is to be interpreted and enforced by the Agency. "The employer must ensure each employee on a walking-working surface with an unprotected side or edge that is 4 feet (1. The following definitions apply in this subpart: Alternating tread-type stair means a type of stairway consisting of a series of treads that usually are attached to a center support in an alternating manner such that an employee typically does not have both feet on the same level while using the stairway. The top edge height may exceed 45 inches (114 cm). 269?from falling by a guardrail system, a safety net system, or a personal fall arrest system. 1: What Are OSHA’s General Requirements? Simply put, OSHA requires that, when a machine in the workplace or any part of it or process that it performs may cause injury, it must be made safe for workers through guarding. 23 Guardrail/Safety Railing Requirements for General Industry. 29(b)(4) When the 200-pound (890-N) test load is applied in a downward direction, the top rail of the guardrailHarwood Grant SH-16625-07 2 Definitions used in 1910. OSHA PROGRAM DIRECTIVE #100-58. 28(b)(3)(i): “Each employee must be protected from falling through any hole (including skylights) that is 4 feet (1. Under the proposal [proposed §1910. 1910. 1910. 29(b)(3) Guardrail systems are capable of withstanding, without failure, a force of at least 200 pounds (890 N) applied in a downward or outward direction within 2 inches (5 cm) of the top edge, at any point along the top rail. 28, the employer did not ensure that each employee on a walking-working surface with an unprotected side or edge that is 4 feet (1. Figure D-12 -- Handrail Measurement. When a guardrail system is used, the guardrail height must be increased in height equal to the height of the stilts. 555 (a) (6) All crossovers, aisles, and passageways shall be conspicuously marked by suitable signs, as required by subpart G of this part. 29 CFR Part 1910 [Docket ID–OSHA–2020–0009] RIN 1218–AD28 Walking-Working Surfaces AGENCY: Occupational Safety and Health. 27(a)). 272, Grain handling facilities. S. 29(b)), and. The top rail should be 42 inches in heightOSHA 1910. 5 inches (24 cm); and. (1) This section requires employers to provide protection for each employee exposed to fall and falling object hazards. Appendix D to § 1910. SO. At the rear, and on the sides, the rail shall not be less than 42 inches high. Using these definitions, therefore, OSHA concludes that a skylight should be regarded as a hatchway, i. 29(f)(1)(iii)(A) The height of the stair rail system is not less than 36 inches (91 cm) and not more than 38 inches (97 cm) as measured at the leading edge of the stair tread to the top surface of the top rail (see Figure D-13 of this section); andEmergency lighting shall be provided at stairways and passageways or aisleways used by employees for emergency exit in case of power failure. 176: Materials Handling (U. S-041); 1990 proposed rule on Personal Protective Equipment--Fall Protection--Docket No. 26, Dockboards;. 23 (b) (12) - Fall Protection Requirements for Fixed Ladders - 09/10/2021. 146 standard for routine entries. 1926. 25(b)(2) Vertical clearance above any stair tread to any overhead obstruction is at least 6 feet, 8 inches (203 cm), as measured from the leading edge of the tread. Legal AuthorityIf we start in section 1910. Additionally, the new rule states that openings between top and midrail. 500 (f) (l) (vi) provides for the utilization of types, sizes and arrangements of railing construction provided they meet the conditions established in sub-paragraph a thru d. Innovative Conveyor Crossovers for an Innovative Electric Auto Manufacturer. from Oregon OSHA’s general industry, walking-working surfaces rules . 34 - Coverage and definitions. 73]. 1917. Employees that are more than 10 feet off the ground need to be protected by using fall arrest systems or guardrails, except for employees that are on single-point and two-point adjustable suspension scaffolds. Prevent falls. The panels work with the SkyCage Post (#70810) and meets OSHA 1926 and 1910 standards. The employer must ensure: ( i) Each employee on a scaffold is protected from falling in accordance 29 CFR part 1926, subpart L; and. 1910. Nose, nosing: that portion of a tread projecting beyond the face of the riser immediately below. 66 - Existing Installations (Mandatory). rail integrated toeboard, safety yellow: 409277: Base 2 posts for use with GC rail, galvanized * Please call for other sizes. 1200 Source: NAICS. The purpose of this exemption was to grandfather in guardrails installed prior to OSHA's adoption of the existing 42-inch requirement for guardrail height (see the. 503 (a) (1) The employer shall provide a training program for each employee who might be exposed to fall hazards. 29 (b) that covers the responsibility for fall protection on working and walking surfaces. 29(b)(4) When the 200-pound (890 N) test load is applied in a downward direction, the top rail of the guardrail system. For guardrails, the General Industry regulations. GUARDRAIL SYSTEMS: 1910. OSHA patterns many of its guardrail system regulations around construction or general industry applications. Because interpreta-tions and enforcement policy may change over time, you should. If you choose to use a guardrail system, you must comply with the 10 OSHA provisions listed below. 23(e)(1) as referenced by 1910. 120(e)(3)] 04/21/2021 - Interim. 23 (a) (2) Designed into or is an integral part of machines or equipment. As a final consideration, know that climbing the scaffolding. Building Code (IBC) and/or the Occupational Safety and Health Administration (OSHA). 28 (b) (13) (ii) When work is performed at least 6 feet (1. Railings can pivot in 45° increments. The top rail must be smooth. Based on the information that you have provided, a maximum opening of four inches between the two guardrails would ensure compliance with 29 CFR 1910. OSHA Standard for Roof Openings. 1910. Top rail: The top rail of a guardrail system. Where mechanical handling equipment is used, sufficient safe clearances shall be allowed for. 29(f)(1)(iii) The top rail of a stair rail system may serve as a handrail only when: 1910. If you have further concerns or questions, please feel free to contact us again by fax at: U. Related Information: 1910 Subpart R - Special Industries 1910. gov; Notification of EEO Violations. OSHA 1910. 1910. (b) Guardrail systems and toeboards. It also must be able to withstand 50lbs being applied to it. 23(c)(1) states that “e very open-sided floor or platform 4 feet or more above adjacent floor or ground level shall be guarded by a standard railing (or the equivalent as specified in paragraph (e)(3) of this section) on all open sides. There are other OSHA standards which may apply, however, such as these dealing with the presence of flammable liquids or atmospheres or other regulated substances.