Using The Stair Calculator; Rule-Of-Thumb Formulas; Modifying Stairs; Boundaries And Riser And Run Lines - Autodesk 24000-000000-9860 - Revit Architecture - PC User Manual

Using the Stair Calculator

1 In drawing area, select the stairs, and click
2 In the Element Properties dialog, click Edit/New.
3 In the Type Properties dialog, under Contruction, click Edit for Calculation Rules.
4 In the Stair Calculator dialog, select Use Stair Calculator for slope calculation.
5 Under Calculation Rule for target slope, enter a value to multiply by Rise.
6 Enter a value to multiply by tread Depth.
7 Enter a Maximum Result and a Minimum Result for the stair calculator.
8 Click OK.

Rule-of-Thumb Formulas

The following is a rule-of-thumb formula for interior stairs, as specified in the Architectural Graphic Standards.
Riser + Tread = 17.5 inches: 7.5 inches for the riser height; 10 inches for the tread depth.
Riser * Tread = 75 inches.
2(Riser) + Tread is greater than or equal to 24 inches (minimum threshold) or less than or equal to 25
inches (maximum threshold).

Modifying Stairs

Boundaries and Riser and Run Lines

Stair boundaries, as well as riser and run lines, can be modified to shape the stairs in the desired manner.
For example, you can select the run line and drag it to add or remove risers. See the Revit Architecture
tutorials for more information.

Modifying Stair Railings

When you add stairs, stair railings are added automatically. You can modify stair railings at any time after
their creation.
1 Select a railing.
668 | Chapter 11 Working with Architectural Components
NOTE The stair calculator uses the tread depth you specified in the instance properties of the stairs.
If the value you specified causes the calculator to produce values that are outside the range of the
acceptable results, a warning is displayed.
The stair calculator computes the tread depth for new stairs only; existing stairs are not affected.
If you are working in a plan view, it may be helpful to use the TAB key to select the railing.
TIP Modifying railings in a 3D view allows for easier selection and better view of your changes.
.