The newest OSHA revisions include the following criteria for OSHA 1910. Except as provided by paragraph (a)(3) of this section, each employee engaged in a steel erection activity who is on a walking/working surface with an unprotected side or edge more than 15 feet (4. S. For the reasons set forth in the preamble, OSHA amends part 1910 of title 29 of the Code of Federal Regulations as follows: Start Part PART 1910—OCCUPATIONAL SAFETY AND HEALTH STANDARDS Subpart D—Walking-Working Surfaces End Part Start Amendment Part. Where mechanical handling equipment is used, sufficient safe clearances shall be allowed for. When the employer can demonstrate that it is not feasible or creates a greater hazard to use guardrail, safety net, or personal fall protection systems on residential roofs, the. 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(e)(6), and the posts and brackets are not required to have a clearance of not less than 3 inches between the top rail or handrail, respectively. The attached memorandum from John O'Neill of OSHA's National Office dated. 7 - Definition and requirements for a nationally recognized testing laboratory. 2 m) or more to a lower level by: ( A) A guardrail system; ( B) A personal fall arrest. 28(c)(2)(iv)], a stair rail may also serve as a handrail if its height is not more than 37 inches nor less than 36 inches. The top rail should be 42 inches in heightOSHA 1910. • Mid rails half way between top rail and staging, working. If you choose to use a guardrail system, you must comply with the 10 OSHA provisions listed below. 501(b)(1), which provides that "[e]ach employee on a walking/working surface. onstrate the use of a guardrail or trav-el restraint system is not feasible, the work may be done without those sys-tems provided:. "The employer must ensure each employee on a walking-working surface with an unprotected side or edge that is 4 feet (1. (1) This section requires employers to provide protection for each employee exposed to fall and falling object hazards. They need to be able to withstand a force of at least 200 pounds (90. The requirements for a guardrail system are stated in §1926. OSHA requires varying industries, mentioned earlier, to meet specific standards. Whenever a guard or shield or guarding by location is infeasible, by using a guardrail or fence. The U. EDGE Fall Protection’s roof hatch railing tackles concerns by providing an OSHA compliant hatch guardrail system around the hatch. Under the proposal [proposed §1910. The employer must ensure guardrail systems meet the following requirements: 1910. 23 (a) (1) Used in emergency operations such as firefighting, rescue, and tactical law enforcement operations, or training for these operations; or. 1926. 1926. 25(b)(2) Vertical clearance above any stair tread to any overhead obstruction is at least 6 feet, 8 inches (203. 1910. 1910. OSHA; Standards; Enforcement; Topics; Media Center; Contact Us; U. 1926. 29(a)(3)(viii). 22(c) CASE. 23 - OSHA requires fall protection for elevator work when a fall hazard is present. 132, before an employee uses a fall protection system, the employer must ensure that he or she is trained in the proper use of the system. Standard #. 23(e)(5)(i). Rail systems on remote trail bridges must be at least 42 inches1926. 29 CFR 1910. 4 - Amendments to this part. 28(b)(3) Holes. TO: REGIONAL ADMINISTRATORS - OSHA. (1) This section requires employers to provide protection for each employee exposed to fall and falling object hazards. Stairs and Guardrail Systems. However, they do provide guidance from their originating organizations related to worker protection. 451(g) or 29 CFR 1910. 23 (e) (3) (iv), the anchoring of posts and framing of members for railings of all types. 451(g)(4. Below is a partial outline of the standard. meets the criteria in §1910. Between six and 15 feet from the edge OSHA 1910. 29 (b): "Fall protection systems and falling object protection -- criteria and practices. Meets OSHA Requirements 1910. 2 m) or more above a lower level is protected from falling by…guardrail systemsOSHA Standard Number 1910. 2 m) or more to a lower level by a guardrail system or handrails. 500(a)(2) and 29 CFR 1926. 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. 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. The National Institute for Occupational Safety and Health evaluated the strength of job-built guardrail structures around an opening. Employers should train workers to: Check to see that a guardrail system is in place before working on the scissor lift. [ref. 1910. 28(c)(2)(ii) and (iv)], for new installation the height of a handrail shall be not less than 36 inches above the tread. 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. 6 m) from the roof edge, the employer must ensure each employee is protected from falling. 23(e)(1) – A standard railing shall consist of a top rail. 21 – Safety. Midrails are. OSHA requires stair landings to be at least the width of the stair and at least 30 inches in depth, measured in the direction of travel [OSHA 1910. 23(d)(5): For through ladders, the steps or rungs are omitted from the extensions,. Bagman is correct, I think, the below is copied from the OSHA website. Watertown, SD 57201-3624. You will still be OSHA compliant without safety harnesses if the guardrail is adequate, but we recommend using them when: The scissor lift work platform is higher than six feet; wearing a harness is part of the scissor lift manufacturer’s instructions; and. A guardrail consists of a top rail 42” + or – 3” no less than 39”, mid rail at 21” and toe board 3. The manufacturer must approve any alterations to the stilts. 176 (a) Use of mechanical equipment. Scroll to Top. weight 380 lbs; 10’ Door, Est. 2023. OSHA guardrail system requirements. 29(b)(5) Result(s) Document Type(s) 1 : Regulations: 1 : Standard Interpretations: Display all referenced documents. 1053 Ladders (Construction) 8. Under OSHA Directive STD 01-01-010 and subsequent proposed rulemaking, the use of such a guardrail by General Industry employees is only a technical violation of the General Industry standard 29 CFR 1910. OSHA 1910. gov; Coronavirus Resources; Disaster Recovery Assistance; DisasterAssistance. 1910. Students receive an OSHA 10-hour or 30-hour course completion card at. OSHA 1910. 451 (b) (3) (ii) The maximum distance from the face for plastering and lathing operations shall be 18 inches (46 cm). Bottom Diagonal Brace, Four Cross Braces, Four End Frames, Guardrail Posts, Guardrail/Midrail, Midside Rail, Toeboard, Top Rail: OSHA Compliant 29 CFR 1926. OSHA defines a guardrail as a barrier designed to prevent employees from falling to a lower level. Top rail: The top rail of a guardrail system. 9. where possible. OSHA Fact Sheet (Publication 3722), (April 2014). 28(c)(2)(ii) and (iv)], for new installation the height of a handrail shall be not less than 36 inches above the tread. OSHA eTool. 29 and a removable guardrail system on all exposed sides, except at the entrance to the stairway. 503 (a) (1) The employer shall provide a training program for each employee who might be exposed to fall hazards. OSHA sheds much-needed light on what is acceptable for protecting workers while using ladders. 29(b)), and. 29(g)(4)), have an acceptable guardrail system (29 CFR § 1910. Here is a list of important OSHA standards for work platforms that you may not be aware of. Scroll to Top. 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. Gates that meet OSHA 29 CFR 1910. visit oshgov. 1053 (a) (1) Ladders shall be capable of supporting the following loads without failure: 1926. The employer may use a designated area when performing. 7 m). 502(k) and training that meets the requirements of 29. 1910. 30. (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 with-in 2 inches (5 cm) of the top edge, at any point along the top rail. Occupational Safety and Health Admin. 1910. The differences between guardrail standards compliant with OSHA 1910 and Cal/OSHA They're often the first choice for passive fall protection. 1910. Stair rail or stair rail system. (b) Guardrail systems and toeboards. 1910. 28, Fall Protection Systems. 66 - Existing Installations (Mandatory). 29 – Manually Propelled Mobile Ladder Stands and Scaffolds (Towers) • 1910. 3 - Petitions for the issuance, amendment, or repeal of a standard. This is why roof safety rails are so important. 1926. Within OSHA 1910. 29(f)(1)(iii)To maintain the efficacy of the guardrail system, the OSHA has strict standards on the spacing of vertical posts and horizontal rails. 502 ). 25 which covers all stairways including standard, spiral, ship, and alternating tread-type stairs. 1910. 22(a)(3): Walking-working surfaces are maintained free of hazards. If you need further assistance, please contact [the Office of General Industry Enforcement at (202) 693-1850]. (ii) – A guardrail system or handrails are not required when:An elevated track system which is located four feet (1. Safety Gates: Both the 1910 and 1926 make specific mention that self-closing gates should be used at guardrail openings, with the 1910 specifying their use around floor holes and points of access,. (3) Every window wall opening at a stairway landing, floor, platform, or29 CFR 1910. The proposed revision would allow use of a personal fall arrest system as an alternative form of protection against a fall through a skylight. Definitions. 29 (b) (1): The top edge height of top rails, or equivalent guardrail system members, is 107. 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. 146. Each employee on a walking/working surface (horizontal and vertical surface) with an unprotected side or edge which is 6 feet (1. 23 (2) Every chute wall opening from which there is a drop of more than 4 feet shall be guarded by one or more of the barriers specified in paragraph (b)(1) of this section or as required by the conditions. 23(e)(6) states: "All handrails and railings shall be provided with a clearance of not less than 3 inches between the handrail or. 132, before an employee uses a fall protection system, the employer must ensure that he or she is trained in the proper use of the system. 28; 1910. 120(e)(3)] 04/21/2021 - Interim. 29 Fall Protection Systems and Falling Object Protection-Criteria and Practices >. 29 (b) (10) Result (s) Document Type (s) 1. Lehtola, Charles M. 4 - Amendments to this part. 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). Get Trained or Become a Trainer. 28(b)(13)(ii): Like working six feet from the edge, you will need standard fall protection, including a fall restraint system, fall arrest system or guardrail. 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. in any direction per OSHA 1910. e. Building Code (IBC) and/or the Occupational Safety and Health Administration (OSHA). 1 comment. The authority citation for part 1910, subpart D, continues to read as follows: 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. This includes indoor and outdoor construction, water tower repairs, shipyard work – anywhere scissor lifts are used. 1910. Notice 1910. Curbs or bull rails installed after October 3, 1983, shall be at least 10 inches (25. 29(b)(3) Additionally, any midrails, screens or solid panels, or other balusters or "intermediate vertical. 147 Lockout/Tagout (p. Innovative Conveyor Crossovers for an Innovative Electric Auto Manufacturer. 2021. 28(b)(3)(i). It is presented here as historical content, for research and review purposes only. 146 standard for routine entries. 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. 502 (b) (3), (4), and (5). OSHA Standard Number 1910. OSHA’s 29 CFR 1910. Section 1926. S. Dear Mr. Guardrail, safety net system, or personal fall arrest system. General Industry. , Labor §1910. 2 - Definitions. Response: Pursuant to §1910. 112 (a) (1) Vehicle curbs, bull rails, or other effective barriers at least six inches (15. 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. 23(e)(5)(i). To ensure effective fall protection, OSHA has specific requirements for the height and strength of guardrails. 1. S-041); 1990 proposed rule on Personal Protective Equipment--Fall Protection-. The language of 29 CFR 1910. 305 Electrical, Wiring Methods (p. This provision allows that employers are not required to provide. 502 (b) (1) Top edge height of top rails, or equivalent guardrail system members, shall be 42 inches (1. 29(f)(1)(iii) The top rail of a stair rail system may serve as a handrail only when: 1910. The employer must ensure each safety net system meets the requirements in 29 CFR part 1926, subpart M. 23 (e) (3) (v). 1910. With respect to § 1910. The final rule replaces the outdated general industry scaffold standards with the requirement that employers comply with OSHA's construction scaffold standards; Phase-in of ladder safety systems or personal fall arrest systems on fixed ladders (§1910. 25 - Stairways, we see that (1910. 48 (a) (2) An elevated walkway with guardrail or equivalent means of protection shall be provided where employees cross over moving conveyors, and suitable guarding shall be provided when employees pass under moving conveyors. Top 10 standards cited as “serious,” fiscal year 2022. (ii) When the employer can demonstrate that it is not feasible or creates a greater hazard to use guardrail, safety net, or personal fall protection systems on residential roofs, the employer must develop and implement a fall protection plan that meets the requirements of 29 CFR 1926. In construction the use of cables or chains to guard door and wall. 48 (b). 1. 1910. A stairway, ladder, ramp or other safe means of egress shall be located in trench excavations that are 4 feet (1. 25, §1910. 303, OSHA requires NRTL approval for many kinds of electrical equipment when they are used in the workplace. safety monitoring systems. com; MADE IN USA. 1053, OSHA Compliant 29 CFR. ( ii) Stairways shall be equipped with rigid and substantial metal handrails. 29 (b) (1) The top edge height of top rails, or equivalent. For example, in final §§ 1910. The top rail of the handrail must be a minimum of 42" [ref. 25(b)(1) states, "Handrails, stair rail systems, and guardrail systems are provided in accordance with 1910. 6 m) from the roof edge, the employer must ensure each employee is protected from falling by using a guardrail system, safety net system, travel restraint system, or personal fall arrest system. 140, OSHA adopts the flexible approach to providing fall protection systems that the construction standard codified in 1994. Here is a list of important OSHA standards for work platforms that you may not be aware of. 451 (d) (10) requires guardrails to be. OSHA 1910. 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. 6 m) from the roof edge, the employer must ensure each employee is protected from falling by a guardrail system. 23(e)(2) and 1910. Wall and Roof Openings; Stairs and Guardrail Systems. (i) – The employer must ensure that each employee on a dockboard is protected from falling 4 feet (1. Panels with 151 to 600 volts should have 42. 21). ( c) Protection from falling objects. 1910. 1. 07/23/1990 - 1910. Each employee in aOSHA says that the guardrail you use should be 42” in height, with a mid-rail at the halfway point. 24(c). OSHA 1910. 25(b)(1) Handrails, stair rail systems, and guardrail systems are provided in accordance with § 1910. When the hole is not in use, the employer must ensure the cover is closed or a removable guard-rail system is provided on the exposed sides; (B) A removable guardrail system and toeboards on not more than two sides of the hole and a fixed guardrail OSHA 1910. Note: These are NOT OSHA regulations. If the vertical opening in the rail is more than 19 inches, then a mid-rail or. Brown, and William J. 451 (b) (4) Each end of a platform, unless cleated or otherwise restrained by hooks or equivalent means, shall extend over the centerline of its support at least 6 inches (15 cm). 451(d)(6)] Also see, OSHA Standards and Interpretation Letter: 06/16/1999 - Scaffolds: Lifelines, support lines, and suspension ropes cannot have a common anchor point. ”. Nomenclature changes to part 1910 appear at 84 FR 21597, May 14, 2019. 68 (b) (6) (v) (a) Emergency landings shall be accessible from both the "up" and "down" rungs of the manlift and shall give access to the ladder required in subparagraph (12) of this paragraph. OSHA Guardrail Code and Requirements. Under the proposal [proposed §1910. Sets forth safety requirements for areas where danger exists of persons or objects falling through floor or wall openings, platforms, runways, ramps, and fixed stairs, in normal, temporary. 27 – Scaffolds and rope descent systems; 1910. 1910. 151, Medical Aid, the. 750. General Industry. 29 and OSHA 29 CFR 1926. 1910. e. 28, however, allows existing guardrail systems to be a minimum of 36 inches high. The study focused on a 2′×4′ opening typical of residential skylights. ( 13) Work on low-slope roofs. OSHA 1910. 5 inches tall. 555 (a) (6) All crossovers, aisles, and passageways shall be conspicuously marked by suitable signs, as required by subpart G of this part. 1 - Purpose and scope. Occupational Safety and Health Administration 200 Constitution Ave NW Washington, DC 20210 1-800-321-OSHA 1. 29(f)(1)(ii)(B), the height of stair rail systems installed on or after January 17, 2017, must not be less than 42 inches (107 cm). 23(b) relating to Protection for Wall Openings and Holes states that every wall opening from which there is a drop of more than 4 feet shall be guarded by an actual fall protection barrier. Top Rail Requirements. 29(b)), and contain a. 28. 1423 (b) (1) Equipment manufactured after November 8, 2011 with lattice booms must be equipped with walkways on the boom (s) if the vertical profile of the boom (from cord centerline to cord centerline) is 6 or more feet. 72 kg) applied within 2 inches (5. S. OSHA Guardrail Dimensions. This code (OSHA 1910. 5 inches (24 cm); ( 3) Have a minimum tread depth of 9. Background II. ( c) Safety net systems. The maximum deflection of the top rail when a load of 200 pounds is applied in any direction at any point on the too rail shall not exceed 3 inches in one direction which includes the free hanging sag in the rope or. 29: 29 CFR 1910. 29 fulfill requirements for guardrail systems. 28(b)(3)(iv) UNPROTECTED EXTENSION LADDER - OSHA 1918. 1 m) plus or minus 3 inches (8 cm) above the walking/working level. Cal-OSHA’s 1” tolerance only. Fall protection. 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. 21 Scope and Definitions. 29(b) Guardrail system strength • Guardrail systems must be capable of withstanding, without failure, a force of at least 200 pounds applied in a downward or outward direction at any point within two inches of the top edge of the top rail. 1052 (c) (2) Winding and spiral stairways shall be equipped with a handrail offset sufficiently to prevent walking on those portions of the stairways where the tread width is less than 6 inches (15 cm). With respect to Sec. 29(f)(1)(ii)(B) The height of stair rail systems installed on or after January 17, 2017 is not less than 42 inches (107 cm) from the leading edge of the stair tread to the top surface of the top rail. " - 1910. In most situations 29 CFR 1910. 5 - Applicability of standards. Open riser:. 23(e)(3)(v)(b)] When the 200-pound (890-N) test load is applied in a downward direction, the top rail. 1926. 20036. shall be guarded by non-rotating caps or safety sleeves, and may not protrude more than one-half the outside diameter of the shaft. gov; USA. Gates can be mounted to swing open to the left or right. 1910. 25 (b) (4)] IBC requires the same width as OSHA. 1910. 29(b)(13)(i)_ reads: The employer must ensure guardrail systems meet the following requirements: (13)(i) Has a self-closing gate that slides or swings away from the hole, and is equipped with a top rail and mid-rail, or. The method to delineate designated areas are contained in 1910. 1910. "The standard authorizes a guardrail but nothing else. 1. Subpart A General. 29(k)(1), the new toeboard requirement needs to be at least 3. What are the general OSHA requirements of toe board? According to OSHA 1910. 252, General requirements. 24(c) UNPROTECTED WALKING-WORKING SURFACES - OSHA 1910. For technical drawings and 3-D models, click. Display all referenced documents. 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. 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). Toeboards are installed at the base of guardrails to protect from objects falling from between the guardrail posts. 1910. Department of Labor, OSHA ensures safe working conditions for men and women through a set of enforced standards that stay at the forefront. 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. Response 1: Under 29 CFR 1910. 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. • Shall stop the fallOSHA – 29CFR 1910 Subpart D – Walking-Working Surfaces . 1910. Safety Rail Source® offers a wide variety of rooftop fall protection. OSHA 29 CFR 1910. 59 which refers to 1910. S. 29 (f) (1) (i)) (as measured at the leading edge of the stair tread to the top surface of the rail). The top rail must be at least 42 inches in height (§1910. OSHA Scaffolding Requirements. 502(b). This is in response to your inquiry of September 25, in which you requested an interpretation of 29 CFR 1910. A belt shifter is a device for mechanically shifting a belt from one pulley to another. 23 (a) (2): Every ladderway floor opening or platform shall be guarded by a standard railing with standard toeboard on all exposed sides (except at entrance to opening), with the passage through the railing either provided with a. 29(b) is the portion of the regulations that contains system requirements that employers must follow to ensure guardrail systems will protect workers from falling to. Narrow Frame Scaffolds. According to OSHA, “Falls are the leading cause of work. 800. 219 Safety Avenue, Andrews, SC 29510 P 866. rail system, safety net system, or per-sonal fall arrest system. There is a 3-inch variance that is allowed in either direction. 1910. means a barrier erected along the exposed or open side of stairways to prevent employees from falling to a lower level. Same with roof hatches. Anchorage. It is important to keep in mind that if a rooftop is as little as 4 feet above. The employer must ensure guardrail systems meet the following requirements: (1) The top edge height of top rails, or equivalent guardrail system members, are 42 inches (107. 29 CFR Parts 1910 and 1926. Guardrail system means a barrier erected along an unprotected or exposed side, edge, or other area of a walking-working surface to prevent. 28(b)(15), “the employer must ensure each employee on a walking working surface 4 feet (1. 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. - 08/30/1999. g. 1. (as defined in 29 CFR 1910. from Oregon OSHA’s general industry, walking-working surfaces rules . 1917. 1926. Occupational Safety and Health Administration (OSHA) has released an updated hazard alert that highlights specific hazards present in workplaces where scissor lifts are used, and defines specific controls employers must implement to prevent incidents. Exceptions: For exceptions to this rule that specify different requirements, see 29 CFR 1926. Amendments to this part. 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. 23. OSHA; Standards; Enforcement; Topics; Media Center; Contact Us; U. 26, Dockboards;. 27, Scaffolds and rope descent systems. In the same. 1917. OSHA requires railings on open sides of stairwells and a handrail on at least on the side, preferably the right side descending at 42″ high. Reply: OSHA's standard at 29 CFR 1910. 28(c)(3), published in the Federal Register, Volume 55, Number 69 on Tuesday, April 10,1990, requires that the minimum finger clearance between handrails, including the top edge of stair rail systems serving as handrails, and any obstructions shall be one and one-half inches. TO: ALL AREA DIRECTORS Paragraph 1926. 1910. 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. According to OSHA standard 1910. 23(e)(1)] 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. Permanent Custom Railing and Crossover Stairs, plus Roof Hatch Railing and Lift & Lock Roof Hatch Opener. ( c) Safety net systems. Under the proposed rule, OSHA determined that the continued use of existing guardrails as low as 36 inches (91 cm) would not unacceptably reduce employee protection. Employers. A guardrail consists of a top rail 42” + or – 3” no less than 39”, mid rail at 21” and toe board 3. 1910. S.