The width of the building entrance ramp should not be less than 1.20m, that of the indoor walkway ramp should not be less than 1.00m, and that of the outdoor entrance ramp should not be less than1.50m. The slope of the building entrance and indoor ramp should not be greater than1/2, and that of the outdoor pedestrian ramp should not be greater than/kloc-0.

Barrier-free access

Barrier-free access is a kind of identification device for personnel entrance management, which is similar to the equipment of subway ticket gate. Unlike gates, it has no blocking devices for unauthorized personnel. The equipment detects people entering through multiple groups (4 to 22 groups) of infrared rays or lasers. When unauthorized personnel pass through, the system will call the police to remind the management personnel.

Generally used in places with fixed personnel, such as large industrial parks, enterprises and institutions, government meetings, large-scale exhibitions, summit forums, etc. Barrier-free access is also called open access and anti-trailing access.