When the slope is less than 20%( 1:5), people can stand and walk with little comfort. When the slope is less than 10%( 1: 10), people feel like walking on the ground. When the gradient is less than 5%( 1:20), it is already the minimum gradient of wheelchair for the disabled. Therefore, as small as 10% is appropriate and can be selected according to conditions.

Article 8.0.3. 1 of Code for Planning and Design of Urban Residential Areas (GB 50 180-93) stipulates that the control index of longitudinal slope of roads in residential areas shall meet the following requirements; The maximum longitudinal slope of motor vehicle lanes should be less than 8%, that of non-motor vehicle lanes should be less than 3%, and that of pedestrian lanes should be less than 8%. If this requirement is exceeded, a step can be set, which is generally greater than 15 degrees. ?

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.

Extended data:

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Maximum longitudinal slope value of highways at all levels:

Plain hills (%)

Highway 3 and 5

Grade14,6

Level 2 5, 7

Level 3 6, 8

Level 4 6, 9

In order to drain water, the road surface and shoulder should have a certain slope, i 1 and I? Express delivery. It varies with the smoothness of the pavement, if the concrete pavement i 1 is1%-1.5%; I 1 of asphalt pavement is1.5%-2.5%; Me? Generally, it is more than i 1 large 1%-2%. ?

Baidu Encyclopedia-Standard for Planning and Design of Urban Residential Areas

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