If you’re looking for a way to make your public spaces more accessible for visually impaired individuals, installing a truncated dome can be a great option. These small, raised bumps on the ground or pavement serve as tactile warnings for individuals with vision impairments, helping them navigate through public spaces safely. Here is a step-by-step guide to help you install truncated domes.
Step 1: Determine the Location and Layout
Before you start the installation process, it’s important to determine the location of the truncated domes. The Americans with Disabilities Act (ADA) provides guidelines for the installation of truncated domes to ensure that they are placed in the most effective locations. According to the ADA, truncated domes should be installed in the following locations:
- At the edge of sidewalks or other pedestrian paths that cross a vehicular way
- At transit platform edges
- At the top and bottom of curb ramps and blended transitions
- At marked crosswalks
In addition to specifying the locations where truncated domes should be installed, the ADA also provides requirements for the size, spacing, and alignment of the domes. For example, the domes should have a diameter of 0.9 inches and a height of 0.2 inches. The spacing between the domes should be between 1.6 and 2.4 inches, while the alignment should be in a rectangular grid pattern.
Once you’ve identified the locations where the truncated domes will be installed, you need to plan the layout of the domes. This will ensure that the domes are properly spaced and aligned according to the ADA guidelines. You can use a chalk line or tape measure to mark the locations where the domes will be installed.
Step 2: Prepare the Surface
Before installing the truncated domes, you need to prepare the surface. Make sure that the surface is clean and free of debris. If there are any cracks or holes in the surface, they need to be repaired. This will ensure that the truncated domes are securely attached to the surface.
Step 3: Mix the Epoxy
Truncated domes are typically installed using an epoxy adhesive. Follow the manufacturer’s instructions to mix the epoxy. It’s important to use the correct amount of epoxy to ensure that the truncated domes are securely attached to the surface.
Step 4: Apply the Epoxy
Using a trowel, apply the epoxy adhesive to the bottom of the truncated domes. Make sure that the adhesive is evenly spread. This will ensure that the truncated domes are properly attached to the surface.
Step 5: Place the Truncated Domes
Carefully place the truncated domes on the surface. Make sure that they are properly aligned and spaced according to the ADA guidelines. It’s important to work quickly when placing the domes, as the epoxy will begin to set within a few minutes. If you’re installing a large number of domes, you may want to work in sections to ensure that the epoxy doesn’t set before you’re finished.
Step 6: Allow the Epoxy to Cure
Allow the epoxy to cure according to the manufacturer’s instructions. This typically takes a few hours. It’s important to avoid stepping on the truncated domes during this time, as this can cause them to become misaligned or damaged.
Step 7: Inspect the Installation
Inspect the installation to make sure that the truncated domes are properly aligned and securely attached to the surface. If any of the domes are loose or misaligned, they will need to be reinstalled. It’s also important to periodically inspect the truncated domes to ensure that they are in good condition and functioning properly.
By following these steps, you can install truncated domes to make your public spaces more accessible for individuals with vision impairments. It’s important to follow the ADA guidelines for the size, spacing, and alignment of the domes to ensure that they provide the necessary tactile warnings for visually impaired individuals. With proper installation and maintenance, truncated domes can be an effective way to improve accessibility in public spaces.
