When you create a stair and choose the shape of the stair, you have the option to create instead a ramp!
Many, not all, of the stair shapes are available to you, and you can have railings.
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"