How to Install a Stairway Handrail | how-tos | DIY
Check the local building codes for height requirements of a handrail. Measure and mark the wall at the bottom and top of the stairs. Connect the marks with a chalk line (Image 1). Locate wall studs with a stud finder and mark them along the chalk line. Use a level to mark the bracket locations to make sure that they are plumb (Image 2).