Ramps are commonly used in construction for several reasons:

1. Accessibility: Ramps provide an accessible means for people with mobility challenges, such as those using wheelchairs, walkers, or strollers, to navigate changes in elevation. They offer a gradual slope instead of stairs, allowing individuals to move up and down more easily.

2. Compliance with Building Codes: Many building codes and accessibility standards require the inclusion of ramps in certain structures to ensure compliance with regulations regarding accessibility and universal design. These codes aim to provide equal access and opportunities for individuals with disabilities.

3. Safety and Convenience: Ramps offer a safer and more convenient alternative to stairs when moving heavy equipment, materials, or wheeled objects. They eliminate the need for lifting objects up and down stairs, reducing the risk of accidents and injuries.

4. Temporary Access: During construction or renovation projects, ramps can be constructed as temporary measures to maintain accessibility while stairs or other pathways are inaccessible or under construction.

5. Emergency Evacuation: Ramps serve as important escape routes during emergencies, such as fires or earthquakes, allowing individuals to evacuate quickly and safely, especially for those who may have difficulty using stairs.

6. Versatility: Ramps can be designed and constructed to accommodate various situations and requirements. They can be made from different materials like concrete, metal, or wood, and their design can be customized to suit specific needs, such as the slope, width, railing, and anti-slip features.

Overall, ramps enhance accessibility, promote safety, and improve the functionality of structures by providing a smooth, gradual incline for people and objects to move between different levels.