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.
To use this rule you must have ramps and other objects used as ramps classified as Ramps in Vertical Access classification.
Vertical Access classification can be done in the Classification View.
(To disable checking of any numeric parameter, set the value to zero.)
The rule parameters are:
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.
Classification Names for Ramps and Stairs Tables: Both tables specify the classification names for ramps and stairs.
Enter Slope and Length: Upon selecting this radio button, you get a table to specify the ramp requirements in slope and its maximum length.
Slope: Slope column specifies the percentage of slope of the ramp.
Maximum Length: This table gives a relation between ramp slope and corresponding maximum ramp length. A value of zero in the length column is considered as unlimited length.
Enter Rise and Gradient:
Upon selecting this radio button, you get a table to specify the maximum rise and gradient requirements. In some countries, there is 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. Any change in the vertical rise of the slope, the gradient of the slope shall confirm to the table given below:
Max Rise: '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.
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.
Classification used for classifying spaces. Classification names are set in the Space Classification Names table.
Analysing the results:
The rule uses two-level categorization in results. The main level category is the construction type of the ramp or undefined if it is not defined. The second category level is the type of the issue. The rule creates following types of issues:
Too Long Ramp
Too Narrow Ramp
Too Narrow Ramp, Clear Width
Too Steep Ramp
Not Enough Space at Beginning
Not Enough Space at End
Too Short Intermediate Landing
No Additional Stairs
Handrail is not continuous
Handrail is not extended enough
Handrail too high
Handrail too low
Not Checked > The rule couldn’t check these ramps
The rule does not have a report.
The rule does not have any tools.