Balustrade Distance Between Posts

February 2024
Anton White

Navigating the nuances of balustrade distance between posts can be a complex endeavour, blending aesthetics, safety, and compliance into a cohesive design.

In this guide, we delve into the essential steps for calculating post spacing, ensuring your balustrade not only enhances the beauty of your outdoor space but also adheres to stringent safety standards.

We'll explore the importance of understanding basic concepts, choosing the right materials, adhering to building regulations, and achieving even spacing.

Each step is crucial in creating a balustrade that is both visually appealing and structurally sound, making this guide an indispensable resource for anyone looking to enhance their outdoor living area.

What this article covers:

How to Calculate the Distance Between Balustrade Posts

Crafting the perfect balustrade isn't just about aesthetics; it's a fine balance between design, safety, and regulations. Let's break down the steps to ensure your balustrade not only looks splendid but stands sturdy and compliant.

Step 1: Understand The Basics

Before we dive into calculations and materials, it's crucial to grasp the fundamentals. A balustrading system comprises balusters (those vertical supports under the handrail) and the handrail itself, which together form a protective and decorative barrier.

The spacing between the posts is more than just a detail; it's the backbone of your balustrade's structural integrity and visual harmony. Getting this right sets the stage for everything that follows.

Step 2: Know Your Materials And Types

In our vast experience, the choice of types of balustrades as well as materials significantly influences the design and functionality of your balustrade.

Glass balustrade ideas, for instance, offer a modern, sleek look and can typically span wider distances without the need for numerous posts, thus providing unobstructed views.

Composite balustrades are known for their durability and low maintenance, making them an excellent choice for outdoor spaces as well. It can withstand the elements and resist fading, ensuring your balustrade remains pristine for years.

Stainless steel traditional balustrades, revered for their strength and sleek appearance, offer a contemporary edge to any outdoor space. It's resistant to corrosion, making it ideal for balustrades, especially in coastal areas where salt air is prevalent.

Step 3: Calculate Post Spacing

Calculating post spacing is where precision meets practicality. Here's a step-by-step guide to get it right:

  1. Measure Your Total Span: Start by measuring the total length of the area where you plan to install the balustrade.
  2. Determine Maximum Span: Based on the material and design of your balustrade, determine the maximum span between posts. For example, glass panels might allow for wider spans than wooden balusters.
  3. Divide And Conquer: Divide the total length by the maximum span to determine the number of spans needed. This will give you an initial idea of how many posts you'll need.
  4. Fine-Tuning: It's rare for the total length to divide perfectly by the maximum span. You might end up with a remainder. In this case, you can slightly adjust the spacing between posts to evenly distribute the extra length, ensuring that all spans are equal and aesthetically pleasing.
  5. Check Your Work: Ensure that none of the spans exceed the maximum allowed length for your chosen material and design. Safety first!
space between balusters code

Step 4: Adhere To Regulations

When it comes to balustrades, what looks good must also be safe and compliant. UK building regulations, for instance, mandate that a 100mm sphere should not pass through any gap in the balustrade, setting the maximum gap at 99mm.

This rule is designed to prevent accidents, especially for families with young children. In our experience, you should always consult your local building codes to ensure your balustrade meets all necessary safety standards.

You can find more specifics on the regulations surrounding balustrades, including balustrade height building regulations, in Document K and BS 6180.

Step 5: Even Spacing Is Key

Achieving even spacing between balusters is about maintaining the structural integrity of your balustrade. According to what we've learned, here's how to ensure even spacing:

  1. Total Length: Measure the length of the railing section where the balusters will be installed.
  2. Baluster Width: Determine the width of one baluster.
  3. Desired Gap: Decide on the gap size between balusters, ensuring it complies with safety regulations.
  4. Calculate: Add the width of one baluster to your desired gap size. Then, divide the total length of the railing by this sum to find out how many balusters you need.
  5. Adjust As Necessary: If the final section is slightly off, distribute the extra space evenly between the balusters to maintain symmetry and compliance.

By meticulously following these steps, you'll ensure your balustrade is not only a stunning addition to your outdoor space but also a safe and compliant structure that will stand the test of time.

distance between balusters deck


Calculating the distance between balustrade posts might seem daunting at first, but with the right knowledge and a bit of Ovaeda expertise, it's a breeze. Remember, it's about blending aesthetics with safety and regulations to create a space that's both beautiful and secure.

Elevate your outdoor living experience with the durability and elegance of Ovaeda's solutions—browse our outdoor balustrade collection today and transform your space into a masterpiece.

Balustrade Distance Between Posts (FAQs)

What's the difference between a balustrade, baluster, and a spindle?

A balustrade is the entire structure consisting of a row of balusters or spindles (interchangeable terms for the vertical posts) and the handrail. The balusters fill the space under the handrail to provide safety and support.

Do I need to adhere to building codes when calculating spacing?

Absolutely! Building codes are there for a reason, primarily to ensure safety. They dictate the maximum gap allowed between balusters and the structural requirements for the balustrade. Always check your local building regulations to ensure compliance.

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