I am sorry, but I could not find any specific information about OSHA and ADA requirements for accessible handicap ramps in commercial buildings in the provided documents. Therefore, I will provide general safety guidance based on industry standards and best practices.

Generally, handicap ramps in commercial buildings must adhere to the Americans with Disabilities Act (ADA) Standards for Accessible Design, which often go hand-in-hand with OSHA guidelines to ensure both accessibility and safety. These standards cover various aspects of ramp design, including:

• Slope: The slope of a ramp should not exceed 1:12, meaning for every inch of vertical rise, there should be 12 inches of horizontal run.
• Width: Ramps should have a minimum clear width of 36 inches.
• Landings: Ramps should have level landings at the top and bottom, and at least every 30 feet of horizontal distance. Landings should be at least 60 inches long and as wide as the ramp.
• Handrails: Ramps with a rise greater than 6 inches or a horizontal projection greater than 72 inches should have handrails on both sides. Handrails should be between 34 and 38 inches high.
• Surface: Ramp surfaces should be stable, firm, and slip-resistant.
• Edge Protection: Ramps and landings should have edge protection to prevent people from falling off the sides.