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207 Accessible Ramp Rule

  • Updated

Important

Rule ID: SOL/207

This article describes how the Accessible Ramp Rule rule works and how you can configure the rule.

This article covers the following topics:

Purpose of the Rule

This rule checks the accessibility of ramps from different perspectives. It checks the ramp slope, length, width, and free spaces at the beginning and at the end of a ramp. It also checks the dimensions of intermediate landings.

Rule Logic

Rule Parameters

In the rule parameters....

Tip

To disable checking of any numeric parameter, set the value to 0 (zero).

Vertical Access

In v9.13.5 and later, you can select to use classifications or filters for selecting ramps and stairs. In earlier versions, you can only use classifications

If you use classifications:

207_parameters_vertical_accesss.png

  • Vertical Access Classification: Classification is used for classifying Ramps and Stairs. The classification names for Ramps and Stairs are used in Classification Names for Ramps and Stairs Tables, respectively.

If you use filters:

207_parameters_vertical_access_filters.png

Ramp

In the component table below, you can

  • Enter Slope and Length: Specify the slope (%) and its maximum length. To add a new row, click row_insert_before_16x16.png.

    207_ramp_slope.png

    • Slope: Specifies the slope percentage of the ramp.

    • Maximum length: The relation between the ramp slope and the corresponding maximum ramp length. A value of 0 (zero) in the length column is considered as unlimited length.

  • Enter Rise and Gradient: Specify the maximum rise and gradient requirements. In some countries, there's a BIM requirement where there is a mapping of values between vertical rise of a slope to the change in Gradient value. The 'Max Rise' value is used to select the gradient requirement for the ramp. The gradient requirement for a ramp is selected from the table by finding the row which has the smallest 'Max Rise' value that exceeds the rise of the ramp.

    207_ramp_rise_gradient.png

    Any change in the vertical rise of the slope, the gradient of the slope shall confirm to the table given below:

    image4.png

    • Max Rise: The maximum vertical rise.

    • Gradient Numerator: The maximum gradient numerator (typically 1).

    • Gradient Denominator: The maximum gradient denominator.

  • Max Rise: Specifies the maximum height of the slope of a ramp.

  • Gradient Numerator: This value should be based according to the table above.

  • Gradient Denominator: This value should be based according to the table above.

  • Minimum Width: The minimum total width required for a ramp.

  • Minimum Clear Width: The minimum clear width required for a ramp.

  • Minimum Space at the Beginning: The free space required at the beginning of the ramp.

  • Minimum Space at the End: The free space required at the end of the ramp.

  • Minimum Intermediate Landing Length: The minimum length of an intermediate landing.

  • Minimum Clear Height Above: The minimum head clearance height above the ramp.

  • Additional Stairs Required: Wherever a ramp is provided in a model, an additional stair must be provided.

  • Maximum Distance to Stair: Maximum distance to an additional stair.

  • Check Internal Ramps: A checkbox, when it is checked checks for Ramps inside the building. Location of the internal Ramps is specified in the Space Classification Names table.

  • Check External Ramps: A checkbox, when it is checked checks for Ramps outside the building.

Handrail

  • Check Handrails: When this checkbox is checked, then all ramps are checked for handrails.

  • Handrail On The Side: This parameter is used to select if ramps should have handrails on one side, both sides, or neither side.

  • Minimum Height Above Ramp: The minimum required height for handrails.

  • Maximum Height Above Ramp: The maximum allowed height for handrails.

  • Minimum Handrail Extension Beyond Ramp: The minimum amount by which handrails must extrude beyond the ramp.

  • Handrails Must Be Continuous: When this is checked, handrails which have gaps in them will produce issues.

Location of Internal Ramps

    Rule Outcome

    The rule uses three-level categorization in results. The main level category contains the classifications of the spaces that the door connects. The second category level is the type of the issue. The third category level is the type of spaces. The rule creates following types of issues:

    • Too high threshold

    • Too low door

    • Too narrow door

    • Too low glazing ratio

    • Opening Direction

    • Free Door Front Side

    • Free Door Back Side

    • Free Door Side

    • Missing a Slab from Under the Free Space Near Door

    • A + B > 2300

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