) wide and reach the lowest water elevation anticipated. 6. 1915. 1926. Ships ladders are permitted to be used in Group I-3 as a component of a means of egress to and from control rooms or elevated facility observation stations not more than 250 square feet (23 m²) with not more than three occupants and for access to unoccupied roofs. 27 for the safe design and load requirements of fixed ladders, appurtenances, and fastenings. The questions below have been restated for clarity. Below are the 2009 and 2012 provisions from the unadulterated IBC. These include individual-rung ladders but not ship stairs, step bolts, or utility hole steps. 605 (b) (2) Unless employees can step safely to or from the wharf, float, barge, or river towboat, either a ramp, meeting the requirements of paragraph (b) (1) of this section. The majority of ladder and step accidents and injuries typically occur due to: Poor maintenance. Is the more steeper than the typical angle a stairs of 45 graduations per OSHA and 30-32 degrees per IBC. For angles 50 to 70 degress for Ship Stairs. 48 cm), center to center;. “Ship’s ladder” and “Ship’s stairs” are interchangeable terms. Requirements for Ladders OSHA has reorganized separate rules for fixed ladders, portable wood ladders and portable metal. 1052 (a) (2) Safety Requirements for Portable Wood Ladders: ANSI: A14. 27 (b) (1) (v) The rungs of an individual-rung ladder shall be so designed that the. 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. 7: Safety Requirements for Mobile Ladder Stands and Mobile Ladder Stand. Please feel free to call us at (888) 310-7040 for questions and inquiries. Please feel free to contact us at (888) 310-7040 for questions and inquiries. A ladder with rails or individual rungs that is permanently attached to a structure, building, or equipment. 1910. 1) Easy to understand – Standardized ships ladder designs are easy for workers and engineers alike to both construct and follow instructions for assembly due to their simplicity in form and design. A mezzanine in compliance with Section 505. 76(a)(4) When cargo is stowed within 4 inches of the back of ladder rungs, the ladder shall be deemed "unsafe" for the purpose of this section. The maximum distance from the face for plastering and lathing operations must be 18 inches. 27 have led to some confusion. [29 CFR 1915. All ladder safety systems shall meet the design requirements of the ladders which they serve [See subsection (c)]. 29 CFR 1926. 23 Ladders §1910. Some Devices are not adjustable adding a further risk to safety when the ships draft changes or due to tidal variation. In general, the standards require the following: A ship's ladder must have toe clearance of 7 inches unless the nature of the work requires a lesser clearance; 4. California Code of Laws, Title 8, Section 3277. 29 (b): "Fall protection systems and falling object protection -- criteria and practices. 1053 (a) (18) & (19) for fixed ladders used only for emergency evacuations. From ferries have limited deck space, ship builders been to scheme stairs equal unusually steep slopes. Remember that ladders in excess of 20 feet require cages and rest platforms are required for each 30 feet of height. Ladders shall be capable of supporting the following loads without failure: 1926. 1915. 2 of IBC has to be considered a portion of the story it. The intent of 29 CFR 1910. Minimum Design Live Load: Ladders must be capable of supporting their maximum intended load. 27 (f) "Maintenance. The employer must ensure: 1910. The personal fall arrest system or ladder safety system provides protection throughout the entire vertical distance of the ladder, including all ladder sections; and (B) The ladder has rest platforms provided at maximum intervals of 150 feet (45. Department of Labor. 1926. ) (f) Stairway platforms shall be no less than the width of. Just for fun, IBC ship ladders: 1011. This Subpart does not. The structure of the accommodation ladders and gangways and their fittings. OSHA Standard 1910. 1918. Additional requirements for ladders used on or with scaffolds are contained in Subpart L – Scaffolds. 25(d) requires a minimum headroom of 6’ 6″, a tread depth of 7. FIGURE 13 Arrangement for Climber Safety Cage of Vertical Ladder. American National Standard Institute (ANSI) standards A14. 15. 29 (f) (1) (ii) (B)) and the handrail must be 30 to 38 inches in height (§1910. 2 allows access to unoccupied roofs to be a roof hatch or trap door. OSHA standards can be found at For a detailed explanation of OSHA jurisdiction. An OSHA-approved state plan must have safety and health requirements at least as effective as those of Federal OSHA and must adopt comparable state1915. g. In certain relationship, alternating tread stairs, ship stairs, the permanent ladders may be used to zugriff. " All ladders shall be maintained in a safe condition. An Alaco heavy-duty ship ladder ensures product and strength. Generally, aluminum ladders are designed to support at least 250 pounds of weight between each rung. 3. LADDERS GENERAL new or replacement ladders ≥ 24’ H require PFAS or LSS RUNGS must be uniform and between 10” – 14” apart; ≥ 16” wide CLEARANCES ≥ 30” on. General requirements; Fiberglass, aluminum, and ship's ladders that are also used in the shipyard and their maintenance requirements are addressed under the general requirements. Meets or exceeds OSHA standards. 502). When used to cross-over a structure, two ships stairs and a platform are used. 6. Where two exit access doorways are required, one is permitted to be a fixed ladder or an alternating tread. 72(a)] Note: There are specific requirements for construction of portable wooden ladders that are less than 30 feet and 30-60 feet. 1. And per 1011. 05–20 of this chapter. 1: Safety Code for Window Cleaning: ANSI: A92. The second way out can be a means of escape - e. STEEL PREFABRICATED STAIRSAND FIXED VERTICAL LADDERS. • Do not use a self-supporting ladder (e. [29 CFR 1915. Rungs must be spaced between 10"-14" inches apart. ( d) Inspection, maintenance, and repair. If a gangway is not practicable, a substantial straight ladder, extending at least 36 inches above the upper landing surface and adequately secured against shifting or. From 50 degrees to 30 degrees show for Standard Stairs. OSHA rules apply to all stairways and ladders used in construction, alteration, repair, painting, decorat-ing and demolition of worksites covered by OSHA’s construction safety and health standards. ”) Also known as, ships ladder or inclined ladder. Safety Requirements for Mobile Ladder Stands and Mobile Ladder Stand Platforms: ANSI: A39. 23(c)(1) and silence on this issue in paragraph 1910. OSHA requirements are set by statute, standards, and regulations. Stat. Occupational Safety and Health Standards for Shipyard Employment. Share on Facebook;OSHA; Standards; Enforcement; Topics; Media Center; Contact Us; U. OSHA and IBC limit furthermore adjusted standards for the difference designs of steep stairways. Ladder Rung Width: 16 Inches. 1917. Also, the American National Standards Institute (ANSI) standard A14. It covers the general and specific requirements for portable and fixed ladders, such as rungs, steps, cleats, width, safety devices, inspection, and load limits. OSHA Rules & Regulations on Ship's Ladders General Regulations. Just make sure not to overdo it because OSHA has also set maximum riser height limits of 9. In stock and ready to ship. This is to confirm a telephone conversation between Joe Bode and Bob Daly of our staff on the above subject. 1926. Two of the essential things to remember before buying a ladder would be the weight and height requirements. 100' cpet (should change that to 400'). Rail and harness fall arrest system as alternate to safety cage and landing platformswood components of ladders shall not exceed those specified in §1910. Stairways and Ladders X Oregon Occupational Safety and Health Division Oregon Administrative Rules AO 3-2015 Division 3 1926. Aluminum ship's ladders. 1915. 1915. 726(4). Always maintain a three point of contact. 71 (d) (2) All vertical and horizontal members shall be fastened together with a coupler or locking device which will form a positive connection. From 30 degrees to 0 degree show for Ramps. [§1910. Injury Source Safety Requirements and Best Practices (Citations to relevant OSHA standards are included below) Incorrect Handling of Materials This web page is a PDF document that contains the full text of the OSHA standard for walking-working surfaces, including the requirements for ladders. OSHA exterior ladder standards indicate that using damaged ones is the victim’s act of negligence, so they cannot file insurance claims or lawsuits in case of accidents. The newest OSHA revisions include the following criteria for OSHA 1910. 2‑2007 and A14. 28(b)(9)(i)(B) You can choose any PFAS provided it meets the OSHA requirements. 1053 (Subpart X – Stairways and Ladders). 22 from the list price if you will provide your own bracing for the system. 910. 91 - Eye and face protection. Load-capacity of 1,000 lbs. Flush Top Tread Ships Ladder with Walk Thru Handrail, Flush Top Tread Ships Ladders, Ladders, Ships Ladder, 68° Steep Incline, Structural Steel Stairways Ships Ladder Design, Access with Minimum Space. slippery material on the rungs, steps or feet. 3-1984 entitled American National Standard for Ladders — Fixed — Safety Requirements, as amended from time to time, other than section 7 of that Standard. C. 1 SECTION INCLUDES A. e. Minimum 8. OSHA; Standards; Enforcement; Topics; Media Center; Contact Us; U. Remember that ladders in excess of 20 feet require cages and rest platforms are required for each 30 feet of height. The Agency’s interpretations explain these require-. Ships Ladders • Provides easier climb, sacrifices floor space • Standards usually 5” deep treads with an anti-slip surface for IBC and 4” minimum for OSHA • Handrails on both sides • Typical ship ladders angle 50° - 70° 6. gov. 6. (2) The standards adopted in subrule (1) of this rule are available from Global Engineering. 27. 3 Permanent ladders. According to the Bureau of Labor Statistic’s Injuries, Illnesses, and Fatalities program, from 2011 to 2016, there were 836 fatal injuries from falling from a ladder. 1200) and Personal Protective Equipment (29 CFR 1915. 5205. 00. 85 (b) Container weight. The purpose of this memorandum is to clarify the requirements for guarding access openings to fixed ladders. 23 (b) (4), ladder rungs, steps, and cleats must have a minimum clear width of 16 inches (measured before installation of ladder safety systems) for fixed ladders. 1915. Rungs must be spaced between 10"-14" inches apart. 910. 1910. 21 as a stairway equipped with treads and stair rails with a slope greater than 70 degrees. In those instances where ship's ladders meet the criteria contained in the proposed revision to Subpart D, dated September 6, 1973, and do not adversely affect the safety of the employees, their use may be considered a de. L. Please note that other design and standards for ship ladders will be considered by WorkSafeNB. Fortunately, Alaco Ladder is committed to quality and safety, which helped us produce ladders that meet the ship ladder OSHA code. We manufacture & carry dozens of industrial-grade, OSHA-compliant aluminum ship ladders. Custom built to exact height. You won’t have to worry about our stairs buckling to wear and tear damage. 1 Pre-use . Handrails extend 42" beyond the top landing for a walk-through exit. S. 54 - Welding, cutting and heating of hollow metal containers and structures not covered by § 1915. 1918. The top rail must be at least 42 inches in height (§1910. [However,] Ship, spiral, and alternating tread-type stairs are not considered standard stairs. capacity. Custom crossover ladders. supersimplex Follow. 25 (b) (8), “Spiral, ship, or alternating tread type stairs are only used when the employer can demonstrate that it is not feasible to provide standard stairs. 71 (j) (1) and (2), unless the nature of the work in progress or the physical conditions prohibit the use. Title: Gangways. (1) Stairways, stairtowers, ladders, elevators, and landings must be designed with sufficient strength to sustain a load of 4. 2-2007, A14. (m) Ladder Safety Systems. Start Preamble AGENCY: Occupational Safety and Health Administration (OSHA), Department of Labor. 21(b)] Grab Bars. Bricks. The requirements contained within this Guide included either via direct inclusion or a reference to other ABS Rules or Guides as well as relevant recognized international Regulations in existence prior to the issuance of this Guide. 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. 1‑2007, A14. For example, the United States’ OSHA (Occupational Safety and Health Administration) defines that all ship stairs (or ship ladders). Some vessel deballasted beyond its lightest seagoing condition in preparation forOSHA’s Powered Platforms standard. IBC requires one means of egress when mezzanine floor areas serve less than 49 occupants. be kept in position, except when goods or materials are being hoisted or lowered at the opening or doorway. Fixed and Cage Ladder Design: 1. OSHA and IBC define and set product fork the different shapes of steep staircase. Standard Number: 1910. This section of the OSHA standards requires that ladders used for ship repairing, shipbuilding and shipbreaking be safe and in good condition. From 50 degrees to 30 degrees show for Standard Stairs. OSHA estimates that, for general industry companies, falls from ladders — step, straight, combination, and extension — account for 20% of fatal and lost workday injuries. [1926. 025(2) and 656. Occupational Safety and Health Administration 200 Constitution Ave NW Washington, DC 20210 1-800-321-OSHA 1-800-321-6742 Federal Government White House; Benefits. Handrails shall be provided on both sides of ship ladders and shall comply with Section R311. 15 Ships ladders. 11, safety cages or wells shall be provided for ladders of more. OSHA; Standards; Enforcement; Topics; Media Center; Contact Us; U. 0065 suspension scaffolds. Alaco produces reasonably sized rungs, according to OSHA crossover ladder standards, to make meeting minimum distance requirements more manageable for our clients. Ship procedures required that safety nets be placed under the accommodation ladder and brow, if applicable, but were not affixed in this case. 1926. In addition to paragraph (b) of this teil, the employer must ensure transport stairs (see Figure D-9 the this section): 1910. 1915. ) (f) Stairway platforms shall be no less than the width of. Landing platforms are required at 50 feet (15,240 mm) above the bottom of the ladder. 1926 Subpart A - General. STEP 4 - Work out head room - another cross section issue. 23(a)(2). These standards are available at the Oregon Occupational Safety and Health Division, Oregon Department of Consumer and Business Services, and the United States Government Printing Office. 1, Extensions for Individual Rung Ladders, stipulates that the general requirement for extension of the ladder above the access/egress level does not apply to ladders "intended for manholes and terminations with hatches. Additionally, there must be a minimum vertical clearance of 6’8” and uniform tread depths and riser heights. 605 (b) (1) Ramps for access of vehicles to or between barges shall be of adequate strength, provided with side boards, well maintained, and properly secured. Appendix C, List of national consensus standards. Sometimes referred to as ship stairs, the term doesn’t mean it’s only used on ships, but merely stairs/ladders between 50° to 70° of incline and applications are for areas where. Head clearance requirements for fixed ladders used on FAA radio communication towers. 1910. 3. OSHA provides ship ladders requirements (they call them shipping stairs) in 29 CFR section 1910. Ladder safety device may also be . OSHA says ship stairs are used only when the employer can demonstrate that it is not feasible to provide standard stair. 2. Contact Alaco Ladder for high-quality and durable manufactured ship ladder, ANSI standard. 81 Friday, No. Steel, aluminum, wood, and fiberglass ladders proudly crafted in the United State been 1908. 1918. Approved gangways are normally required on ships of 30 metres in length or over, and approved accommodation ladders on ships of 120 metres in length or over. Table of contents. 1915. 1053 - Clarification on when a trestle ladder would be considered a stepladder. The top rail must be at least 42 inches in height (§1910. For unoccupied roofs, under the exception to IBC 1011. Contact Alaco Ladder for high-quality and durable manufactured ship ladder, ANSI standard. Steel, aluminum, wood, and fiberglass ladders proudly made in the United States since 1908. A ship's ladder is a specific style of stairway initially used on ships. 27(d)(3)] Note: The purpose of this standard is to give the climber something to hold onto while getting off and onto the ladder. 9 (1) A fixed ladder installed after the day of the coming into force of this section shall be designed, constructed and installed in accordance with the requirements of ANSI Standard A14. 160 • Fire Detection Systems, 1910. 2 Purpose. OSHA’s Powered Platforms standard. 25 (b) indicates that each stair should accommodate. Our aluminium monkey ladders are made to the greatest quality and safety standards, and they are made to withstand demanding working situations. 1926. Section 1910. Spiral stairs must meet the vertical clearance requirements in paragraph (d) (3) of this section. g. OSHA requirements are set by statute, standards, and regulations. If an Occupational Safety and Health Administration (OSHA) compliance officer were to observe conditions as described in item 4 above, a violation would be noted and. 5" tread depth. 36" inboard rails. When scaffold platforms are more than 24 inches (61 cm) above or below a point of access, ladders, ramps, walkways, or similar surfaces must be used. 5″. When a ship's ladder extends farther than 6 feet, all employees who will be working on that ladder. Fixed ladders have their. A ladder or stairway must be provided when the worksite has a break in elevation of 19” (48cm) or more, and there is no runway, ramp, embankment, or personal hoist for workers’ access. 82 (a) (1) The employer shall ensure that each work area and walkway is adequately lighted whenever an employee is present. For manufactured ship ladder, Alaco Ladder offers two general options: roof hatch access ships ladders and mezzanine access ships ladders. 45° incline. a roof hatch or similar - to solve the cost. General requirements; Fiberglass, aluminum, and ship's ladders, which are also used in the shipyard and their maintenance requirements are addressed under the general requirements. Ships with rubber bumper attached to the center stringer. As you can see from the above sketch, there is a single direction of travel to the ladder from the catwalk. The width of ship ladders is usually 24" and the tread depth is 6". 5207. They are ideal for chimneys, towers, vats, antennas, tanks, water treatment plants, refineries and other industrial or marine applications. 51 m) in width, of adequate strength, maintained in safe repair and safely secured shall be used. 1926. 25 (b) (8)) This product provides an easier climb, but in turn sacrifices floor space. • Ladders must be free of any . The OSHA General Requirements (29 CFR 1926. Alaco Ladders’ range of heavy-duty aluminum loft ladders are the preferred choice of most commercial property builders because other than Alaco’s aluminum ladders being made using aircraft grade aluminum alloy (6061-T6 aluminum alloy), each ladder unit is made with exact precision, built by expert craftsmen following strict ANSI and OSHA. Safety Requirements for Mobile Ladder Stands and Mobile Ladder Stand Platforms: ANSI: A39. 3 was changed in 1979 to require a safety cage on a ladder over 24 feet long, instead of the former 20 feet, mean that 29 CFR 1910. 8 kPa (100. Step spacing shall not exceed 16 inches between the top surfaces of rungs and shall be uniform throughout the length of the ladder. g. 00. Stairs from your complete source for material handling equipment. The reader must be thoroughly familiar with these regulations as they apply to. 29 CFR 1926. Rung Spacing: 10" minimum and 14" maximum spacing from centerline to centerline of rungs. Falls from ladders account for 20 percent of all fatal and lost work-day injuries in general industry. 5” H. There should be open risers with at least 6. 25(e) Ship stairs. Vertical Center Line of the Fixed Ladder. If a gangway is not practicable, a substantial straight ladder, extending at least 36 inches above the upper landing surface and adequately secured against shifting or slipping shall be provided. : 3 01/21/2010 - 1926. 223 November 18, 2016 Part VII Book 3 of 3 Books Pages 82493-83106 Department of. (a) A vessel carrying more than 600 passengers or with overnight accommodations for more than 49 passengers must meet the requirements for stairways, ladders, and elevators in § 72. 454, Training requirements. Environment, Safety & Health Division Ladder and Scaffold Safety | Portable Ladder Requirements . For guidance in addressing your request and as advised by yourself and the architect, I reviewed the Guideline on Ship’s Ladders from WorkSafeBC, which states the following: WorkSafeBC Guideline G13. 1926 Subpart A - General. The Agency’s interpretations explain these require- ments and how they apply to particular circumstances, but they do not create additional employer obligations. 306. This is in response to your February 25, 2015, letter in which you ask about OSHA's enforcement policy with regard to fixed ladders built to certain specifications. Ship ladders, ship stairs, and alternating tread stairs designing specifications, standards, OSHA and IBC code requirements, and gender of steep stairs. 5 - OMB control numbers under the Paperwork Reduction Act. All parts and appurtenances necessary for a safe and efficient ladder shall be considered integral parts of the design. Please feel free to call us at (888) 310-7040 for questions and inquiries. Retractable or flip ladders may be used as an alternative to fixed ladders to avoid marina fouling of the lower steps, but they can be difficult for a swimmer to reach and pull down in case of an emergency. Ship Ladder Dimensions - Be sure to check current OSHA and local codes. 7. 74(d) may be used. 91-596, encourages states to develop and operate, under OSHA guidance, their own job safety and health plans. Cages and wells are not ladder safety systems. 2‑2007 and A14. 2(1)(b) Ladders in manholes G13. 25(d) OSHA ladder standards require a minimum headroom of 6’6″, a clear width of 26″, and a tread depth of 7. OSHA Ship Stairs Requirements. (OSHA 1910. If necessary, the training. 72(a)] Note:. 25(b) According to standard number. Fixed ladders above 24 feet must have a fall protection system Previously, the OSHA required fixed ladders taller than 20 feet to have cages as a form of fall protection. There are two very good reasons for using the pilotladder in the correct way: The safety of the pilot and the structural integrity of the pilotladder. 23(c)(2) and in the fixed ladder standard at 1910. 2 Standards G13. Understanding the IBC go requirements and OSHA stairway requirements for roof access, usability, and safety of each select von device will help you choose the right device for accessing roof hatches and unoccupied rooftop spaces. 1910. 28 (b) (11) (ii) Table D-2 contains a printing error, which OSHA will correct in a published notice. The aluminum brow was placed ontop of a 1 x 1 foot timberhead as a ramp on the dock and only held in place by gravity. Ship ladders are permitted to be used in Group I-3 as a component of a means of egress to and from control rooms or elevated facility observation stations not more than 250 square feet (23 m 2) with not more than three occupants and. 0100 submission of environmental control measures. , step ladder) as a single ladder or in a partially closed position. 85 (a) (3) The sum of the weight of the container and the maximum cargo weight, in pounds. A ship's ladder is a specific style of stairway initially used on ships. 71 Scaffolds or staging. An OSHA-approved state plan must have safety and health requirements at least as effective as those of Federal OSHA and must adopt comparable state1915. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. When climbing or descending the ladder, the three points of contact should be observed for a secure handhold on the ladder. 92 - Respiratory protection. Handrails ship unattached and bolt into place. Department of Labor200 Constitution Avenue, NW, N-3101 Washington, DC 20210 Telephone (202) 693-1888 or fax to (202) 693-2498. 5″, which all our units follow. 11 m) to six inches (. 23(b)(2) Ladder rungs, steps, and cleats are spaced not less than 10 inches (25 cm) and not more than 14 inches (361926. training must cover ladder hazards, how to use ladders, ladder capacities, and Oregon OSHA’s requirements for the ladders they use. In this section, OSHA states that a “spiral, ship, or alternating tread-type stairs are used only when the employer can demonstrate that it is not feasible to provide standard stairs. Stairs from your. Falls from ladders account for 20 percent of all fatal and lost work-day injuries in general industry. 453, Aerial lifts. 1047March 17, 2021 by Nick Klamecki, Author. A “Ship Ladder” is defined by OSHA in proposed section 1910. • Do not use the top step/rung of a ladder asLadder Safety Foreword This Guide designates the practices that should be followed by the member firms of the Infrastructure Health & Safety Association (IHSA) when using lad-. Ships Ladders • Provides easier climb, sacrifices floor space • Standards usually 5” deep treads with an anti-slip surface for IBC and 4” minimum for OSHA • Handrails on both. ANSI Standard A14. S. Meets or exceeds OSHA requirements. 2(1) Ships' ladders G13. Extend-A-Rail Ladder Safety Post for Ladder to Roof Hatch. Ship ladders are permitted to be used in Group I-3 as a component of a means of egress to and from control rooms or elevated facility observation stations not more than 250 square feet (23 m 2) with not more than three occupants and. 3 Means of Egress > 408. When conditions are such that neither a walkway nor a straight ladder can be used, a Jacob's ladder in accordance with the requirements of paragraph (d) of this section may be used. 76(a) Cargo spaces. 451(e)(1) ] When using direct access, the surface must not be more than 24 inches (61 cm) above or 14 inches (36 cm) horizontally from the surface. 97 MB) This guide provides compliance information to help the metal and nonmetal mining industry meet current requirements of the Mine Safety and Health Administration’s (MSHA’s) ladder safety standards. " The employer must ensure guardrail systems. Fire escape ladders have served as a means of escaping homes and buildings during fires, earthquakes, or emergency events for many years. The opening through the 2. Let’s take a look at what the top 10 violations for FY22 are. 2 Electrical requirements. Occupational Health and Safety regulations are applicable. (Theequipment. Some guard exceptions. The implementation of controls, procedures, and training help raise. The same section indicates that the landings at a ladder’s sides should at least be 30” wide. 2(1)-2 Application of CSA and ANSI standards for suspended stages. OSHA provides the ship ladder standards include untergliederung 1910. These are specifically designed to provide ladder fall protection when climbing or descending ladders or vertical structures up to 300 feet in height. Sometimes referred to as ship stairs, the term doesn’t mean it’s only used on ships, but merely stairs/ladders between 50° to 70° of incline and applications are for areas where.