---
title: How To Measure Your Structual Opening
description: "To measure your structual opening firstly ensure there is no pre-existing frame installed. Next, take 3 measurements for the width, one at the top, middle and bottom of the opening. Use the smallest of these measurements. Then, take 3 measurements…"
url: "https://www.lathamssteeldoors.com.au/support/measure-your-structual-opening/"
updated: "2020-09-27"
category: Ordering
---

# How To Measure Your Structual Opening

To measure your structual opening firstly ensure there is no pre-existing frame installed.

Next, take 3 measurements for the width, one at the top, middle and bottom of the opening. Use the smallest of these measurements. Then, take 3 measurements for the height, one on the left side, middle, using the smallest measurements for that too.

Your structural opening will then be the smallest width x smallest height.

We also have a video showing how to measure your opening:

[How to measure your door opening](https://www.youtube.com/embed/I_Y_5dLMEIA?feature=oembed)

All of our steel doors are supplied pre-hung in their frame. For the strongest installation we advise fixing our steel frames directly into the aperture.