hand·rail. A narrow railing that is grasped with the hand for support, as on a staircase.

Is it handrail or hand rail?

A handrail is a rail that is designed to be grasped by the hand so as to provide stability or support. Handrails are commonly used while ascending or descending stairways and escalators in order to prevent injurious falls.

How do you spell hand railings?

a rail serving as a support or guard at the side of a stairway, platform, etc.