Rooftop Ladders Slide Share
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This document provides information on fixed vertical ladders from Precision Ladders, including typical applications, applicable safety codes, design requirements, and specifications. It discusses the three main types of fixed ladders and covers OSHA and ANSI safety code guidelines for rung spacing, clearances, pitch, safety cages, and landing platforms. Special considerations are given for ladder extensions, step across distances, climber clearance, and live load ratings.
Rooftop Ladders Slide Share
- 1. 4188 East Andrew Johnson Highway Morristown, TN 37814 800-225-7814 www.precisionladders.com FL Series Access Ladders © Precision Ladders 2017
- 2. Ladders Typical Applications: • Schools • Government buildings • Retail stores • Churches • Hospitals • Banks • Drug stores • Laboratories • Libraries • Museums • Restaurants • Sports arenas
- 3. There are 3 Types of Fixed Vertical Ladders: • To a Hatch• To a Walk-Thru • Side Exit = Overshoot
- 5. Applicable Codes for Fixed Ladders • OSHA-Occupational Safety & Health Admin. • ANSI-American National Standards Institute • OSHA and ANSI code are similar. The more stringent code element in each is used as a guideline in this presentation. • National codes • OSHA 1910.23 • www.OSHA.gov • ANSI A14.3 • www.ANSI.org • Websites offer easy code reference Note: Some states may have special code requirements
- 6. Applicable Codes for Fixed Ladders • OSHA refers to ANSI but alters its version of the code. • Best Practice: • Select a manufacturer who builds to the more stringent of the two codes or the overlap of the two codes. • Some states may have special code requirements. • Manufactures will advise you on exact requirements.
- 7. Ladder Extensions at Walk Thru Exit • 24” clear opening • Standard true for caged ladders • Exit Straight through = 42” side rail extension is required
- 8. Step Across Distance • Distance from the top tread to a weight bearing surface: • OSHA = 7” to 12” • ANSI = 7” to 12” • Platforms are required to gap larger step across distances
- 9. Areas of Angle • Ladders may not have angles greater than 90° • Preferred pitch – 76° to 90° • Substandard pitch (inclined, ships ladder) – 60° to 75°
- 10. • Live Load per Rung Requirements • 250 lbs. (ANSI) • Note: Industry standard is +/- 1000 pounds Rungs, Cleats or Steps
- 11. Rungs, Cleats or Steps • Requirement = burr free power grip surface • Any shape is accepted • ¾” minimum cross section standard • 1” minimum in high corrosion areas • Anti-slip texture preferred
- 12. Rungs, Cleats or Steps • OSHA says 10-14” vertical spacing • ANSI says 12” vertical step spacing • Uniform spacing throughout climb • ANSI states bottom rung 14” maximum above ground 12” MAX 14” MAX 14” MAX 12”
- 13. Clearances (Clear Width of Tread) 16” MIN16” min • 16” minimum between side rails
- 14. Clear Space Behind Ladder • 7” minimum clear space behind ladder • Exceptions for unavoidable obstructions are rarely granted. 7” MIN 7” min
- 15. Climber Clearance 15” MIN15“ min 15” min • 15” Clear width left and right • Except when cage required
- 16. Climber Clearance • Minimum 30” clearance • Minimum 36” at a 76° pitch • All others proportional distance determined by slope 2’ 6”min
- 17. Safety Cages (OSHA) • Cages provided on ladders more than 24’ • Existing (installed before November 19, 2018) equipped with personal fall arrest system, ladder safety system, cage or well • New (installed after November 19, 2018) equipped with a personal fall arrest system or ladder safety system • Final Deadline (on and after November 18, 2036) All fixed ladders equipped with a person fall arrest system or ladders safety system • Recommended on shorter ladders in dangerous locations • Cages extend past exit point • Cages start between 7’ and 8’ above ground • Cage sizes and shapes set by code
- 18. Safety Cages (ANSI) • Cages provided on ladders more than 24’ • Recommended on shorter ladders in dangerous locations • Cages extend past exit point • Cages start between 7’ and 8’ above ground • Cage sizes and shapes are set by code
- 19. Landing Platforms • Landings provided at maximum intervals of 50’ • Rest platforms offset at each level • Rest platforms have handrails and toe boards on all exposed sides • Landing minimum 24 inches by 30 inches • Ladder accessing landing have rung level with platform
- 20. 4188 East Andrew Johnson Highway Morristown, TN 37814 800-225-7814 www.precisionladders.com FL Series Wall Ladders © Precision Ladders 2017