1/21/2024 0 Comments Projeto mini ramp concretoLeaving aside handrails, we can't forget that there is also a protective element on the perimeter of the ramp that exists to avoid any accidents on the clear edges, both by the sliding of wheelchairs, baby carriages, canes, or to warn people with reduced visual capacity.ĭepending on local regulations, we find recommendations that range from a clearance width between handrails of at least 120 centimeters, as it comfortably allows the passage of a wheelchair and enables anyone to hold on both sides and a minimum clearance width of 180 centimeters for public spaces. They must be built in a fixed position and with smooth materials that don't change with temperature variations (imagine a handrail exposed to the sun throughout the day or in areas that experience freezing temperatures). In addition, it is necessary that the handrails extend at their ends more than 30 centimeters so that anyone can reach it from the horizontal plane. ![]() Ramps must have continuous handrails-without interruptions-along their entire length, on both sides, and with different heights, ideally one between 65-75 cm and another between 90-100 cm. A person in a wheelchair cannot perform the opening maneuvers while sitting on the slope of the ramp. ![]() In addition, it must be taken into account that with each change of direction, there must be a horizontal plane of at least 150 cm in diameter-a measurement that allows the 360 ° rotation of a wheelchair.Īt their ends, ramps must have another horizontal plane of a minimum of 150 cm in diameter, free of obstacles and not impeded by the opening of doors. The lengths of ramps must always be straight, as curved ramps make it difficult for the movement of a person in a wheelchair in reference to this, the transverse slope of a ramp should also not exceed 2%, thereby avoiding any lateral slippage. To overcome a height of 90 centimeters, we will use a slope of 6%, which results in a 15 meter horizontal length. The ramps should not have an excessive length without breaks-a maximum length of 9 meters-due to the efforts required to ascend without help in a wheelchair, or the force needed to transport heavy cargo.Įxample of Calculated Distance Required (d) For distances of up to 3 meters it must be less than 10%, and for distances of up to 9 meters, it should be less than 8%, always taking the above considerations regarding height into account. In relation to the length of the ramp, for short distances-up to 1.5 meters-the slope should be less than 12%. As the heights require greater efforts, the slopes begin to reduce to reach recommendable values of 8% for heights of up to 50 centimeters 6% for heights of up to 100 centimeters 5% for heights of up to 150 centimeters and 4% for ramps being used by the elderly. Based on averages and considerations from different countries -both regulatory and from manuals from Latin America-a slope of between 12-10% can, for example, be used only for very small heights, such as a step of up to 20 centimeters. The recommended maximum slope for outdoor ramps can be established in relation to the height to be overcome and depends on the length of the plane. + How to design and calculate a staircase? The slope can be expressed as a percentage that results from the ratio between the height to be overcome (h) and the length of the horizontal plane (d), multiplied by 100.Īccordingly, knowing the height to overcome on a project allows us to review recommendations for a slope consistent with the required needs. To what extent can the slope of a ramp be modified? How can we determine its width and the space needed for maneuvering? What considerations exist regarding the handrails? Here we review some calculations and design examples for different ramps, below. The following clarifications are intended to assist and determine the appropriate dimensions for comfortable and efficient ramps for all, based on the concept of universal accessibility. ![]() ![]() We already know that the ramp, aside from its different design possibilities, allows-without forgetting the notion of promenade architecturale-its users to overcome physical barriers in the urban and architectural context.Īlthough it basically consists of a continuous surface with a particular angle of slope, it is necessary to point out the many constructive specifications, which of course may vary due based on the standards of different governing bodies.
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