Composite deck railing is required on both sides of ramps with an increase greater than 6 inches and on most stairs. Guide bars are not required on slopes with running slopes less than 1:20 scale (one inch of height for every 20 feet), but if they must comply with these standards. They must be continuous throughout the length of each flight or ramp, including switch or doglegs.
The tip of a handrail should be between 34 inches (865 mm) and 38 inches (965 mm) above the walkways, stairways and ramp surfaces. The height composite deck railing must be consistent. For buildings like schools, used primarily by children, a second set of rails with a maximum height of 28 inches and at least 9 inches of approval from the upper rack is recommended.
The railing grip surfaces must be 1 1/2 inches (38 mm) from all adjacent surfaces, continuous and unrestrained along the top and sides. The lower part of the grip area must not be blocked for more than 20 percent of its length. Grip surfaces and any adjacent surfaces shall have rounded edges and be free from sharp or abrasive elements. The composite deck railing, whether ramps, stairs, bathrooms or lifts, are an important part of accessibility. In addition to being required by law, they add an additional measure of safety and convenience to anyone using a space. Many companies offer ADA-compatible handrail kits.
This post topic: Deck Design