---
title: Nosing
description: "## ![stair runner glossary, stair nosing, staircase nosing, staircase terminology, staircase components](https://eayei6t27mg.exactdn.com/wp-content/uploads/2023/04/glossary-nosing.jpg?strip=all&resize=236%2C236)Stair Nosing (Also referred to as Bull-nose) The rounded front or outside edge of the step/stair [tread](/docs/tread/) which generally protrudes out over the vertical riser. The nosing or nose…"
url: "https://www.stairrunnerstore.com/docs/nosing/"
updated: "2024-09-29"
category: Glossary
tags:
  - Staircase Glossary
---

# Nosing

## ![stair runner glossary, stair nosing, staircase nosing, staircase terminology, staircase components](https://eayei6t27mg.exactdn.com/wp-content/uploads/2023/04/glossary-nosing.jpg?strip=all&resize=236%2C236)Stair Nosing

(Also referred to as Bull-nose) The rounded front or outside edge of the step/stair [tread](/docs/tread/) which generally protrudes out over the vertical riser.

The nosing or nose is the front part of the step that protrudes out over the [riser.](/docs/riser/)

A nosing can also be located on a floor above the staircase or on the front of a [landing.](/docs/landing/)

### The image above highlights Stair Nosings.