When building an ERP, it is often the case that a drop cannot be avoided. In this case, an access ramp for PRMs and people with disabilities can be installed. As part of the new building, a permanent ramp must be installed in the event of a drop in height, built in the establishment, inside or on the outside path of the establishment.
Why a fixed wheelchair ramp for handicapped? Because the law provides for independent access at all times. Access to your building must therefore be possible without outside help. Your wheelchair ramp must be accessible without effort; the regulations therefore impose a maximum difference in height. A difference in height corresponds to the slope of the ramp and is expressed in%.
The slope calculation formula is as follows:
- Percentage of slope% = Height of step or length of ramp
What are the slope percentages to respect?
- A slope of 5% for all access
- A slope of between 5% and 8% over a maximum length of 2 m
- A slope between 8% and 10% over 0.5 m maximum length
- A slope greater than 10% is prohibited
If the slope is greater than or equal to 4%, a rest level must be set up every 10 meters. It must be 1.40 m long by 1.20 m wide. You must not have any steps or jumps greater than 2 cm. As soon as this height is exceeded, a ramp must be installed to allow people with disabilities and reduced mobility to access your building.
Slope diagram for ramp
Depending on the height of your steps, you will choose the length of your ramp to respect the regulatory slope percentages.
What are the slope percentages for the disabled access ramps for the existing public buildings?
For existing public buildings, the tolerated slope percentages are as follows within the framework of the decree:
- A slope of 6% for all access
- A slope of between 6% and 10% over a maximum length of 2 m
- A slope of between 10% and 12% over 0.5 m maximum length
- A slope greater than 12% is prohibited
If the slope is greater than or equal to 5%, a rest level must be set up every 10 meters . It must be 1.40 m long by 1.20 m wide.
Slope of disabled access ramps not accepted
The maximum allowable jump is also 2 cm unless the slope is greater than 33%: in this case, a maximum jump of 4 cm is tolerated. This ramp can be, in order of preference:
- A permanent ramp, integrated inside the establishment or built on the outside path of the establishment,
- A permanent inclined ramp or placed with control over the public domain,
- A removable ramp fitted with a device allowing the disabled person to signal his presence to the staff of the establishment, such as a bell.
It will also always be a removable ramp. As long as the ramp is not fixed, and a person is present to help and secure the crossing of the obstacle, then a slope can be used with a greater degree of inclination.