Use the Stair tool to define a stair run. Refer to these steps to select the appropriate tool and specify initial options, and then refer to the specific procedure for the type of run you are creating. 
-  Click Architecture tab Circulation panel Circulation panel  (Stair). (Stair).
-  On the Component panel, verify that Run is selected. 
- In the Draw gallery, select one of the following tools to create the desired run type: 
   (Straight) (Straight)
 (Full-Step Spiral) (Full-Step Spiral)
 (Center-Ends Spiral) (Center-Ends Spiral)
 (L-Shape Winder) (L-Shape Winder)
 (U-Shape Winder) (U-Shape Winder)
 
- On the Options Bar: 
  - For Location Line, select the creation path for the run relative to the Up-direction: 
		
 
		- Exterior Support: Left (1) 
		  
- Run: Left (2) 
		  
-  Run: Center (3) 
		  
-  Run: Right (4) 
		  
- Exterior Support: Right (5) 
		  
  Depending on the type of run you are creating, it can be helpful to change the Location Line option. For example, if you are creating a winder run and want to snap the left edge to a wall, choose Exterior Support: Left for Location Line. 
		 
-  For Offset, specify an optional offset value for the creation path. For example, if you enter 3" for Offset and the Location Line is Run: Center, the creation path is 3" to the right of the center line of the stair (in the Up-direction). A negative offset is to the left of the center line. 
	 
- For Actual Run Width, specify a value for the run width. This is the value of the run not including supports. 
	 
-  Automatic Landing is selected by default. If you create 2 separate runs to reach the next level, 
		Revit automatically creates a landing between the 2 runs. Clear this option if you do not want to create landings automatically. 
	 
 
-  In the Type Selector, select the type of stair you want to create. You can change the type later, if required. 
- Optionally, you can specify run instance properties, such as Relative Base Height, and Begin with Riser/End with Riser preferences. On the Properties palette, select New Stairs: Runs, and modify the instance properties as required. See 
  Run Component Instance Properties. 
  
 
-  Optionally, on the Tools palette, click 
   (Railing). (Railing). By default, a railing is automatically created when you create a run. 
   In the Railing dialog: 
   -  Select the railing type or select None if you do not want to create a railing automatically. You can also add a railing later, if required. (See 
		Place a Railing on a Host or 
		Create a Railing by Sketching.) 
	 
- Select to position the railing on the Treads or Stringer. 
	 
- Click OK. 
		Note: You will not see the railing until you finish creating the stair. 
		 
 
- Follow the procedure for the specific type of run component you are creating.