What You Need to Know About Wind Load and Farm Sheds

30 November

As a general rule, wind loading is something that your local council and your structural engineer will look after, and not something that you need to be heavily involved in. 

However, it’s always interesting to learn about all the different factors that go into designing a Buffalo Built shed!

Below, our Managing Director Ross Barker walks through what these factors mean and how they can potentially affect the design of your farm shed. 

Picture of Ross Barker
Ross Barker

Managing Director, Buffalo Built

In this Article:

Wind Classifications for Farm Sheds

Depending on the location of your property, your shed builder may need to take wind load into account when designing your shed. It is important that this measurement be taken into account so that your shed can be constructed appropriately to safely withstand severe weather conditions. Of course, each site and project is different, so the following information is a guide only – please get in touch with us for personalised information.

What is Wind Load?

Wind load (or design wind speed) measures the amount of force on a structure, and to determine the wind classification for your shed, the Building Code states you must consider several different factors:

  • Region
  • Terrain
  • Shielding Factors
  • Topography
  • Importance Level
farm sheds

1. Regional Wind Rating

In general, North East Victoria where most of our customers build their farm sheds is classed as a ‘normal’ wind region. The exact wind region associated with your site locality can be obtained from your local Council, a structural engineer, a building surveyor or a certifier.

2. Terrain Category

The Building Code lays out several different scenarios here, but in short, the ‘roughness’ of the surrounding land can have an impact on how wind hits your shed. Trees and other structures create a windbreak, whilst big open flat surfaces encourage higher wind speeds.

3. Shielding Factor

Farm sheds surrounded by houses or other structures will be protected from the full force of the wind. A shielding factor reduces the design wind speed by taking into account the protection afforded by upwind local buildings.

4. Topography

The topography multiplier increases the design wind speed based on the gradient upwind of the site. This means if you intend to build your farm shed on top of a large, steep hill, it will receive higher wind forces than if you built it in a sheltered valley.

5. Importance Level

The other factor involved in calculating wind loading is the importance level. This assesses how extensive the damage to people and property could be if the shed was to collapse.

A hay shed, for example, presents a lower hazard level – if it was to be damaged by wind it’s unlikely that anyone would get hurt. Buildings such as school shade structures on the other hand could have catastrophic results if they were to collapse.

Are Buffalo Farm Sheds Built to Withstand High Winds?

Most sheds from Buffalo Built are designed using one of four standard configurations (take a look at our range of farm sheds). Each of these designs has been engineered to handle different requirements, with the larger, more robust designs featuring heavier gauge steel and universal beam frames.

"If your site tends to get a lot of wind, we may recommend a more solid design to ensure strength and robustness in challenging weather conditions."
Ross Barker
Ross Barker

This information is to be used as an approximate guide only, and there are several more complex factors that go into determining wind actions on farm sheds. Always consult your local Council and use a reputable shed builder to ensure the safest possible structure.

Picture of Ross Barker

Ross Barker

Managing Director, Buffalo Built

Contact Buffalo Built for Farm Sheds that are Built Tough!

Regardless of the specifications unique to your site, our team is here to ensure you get the safest, most appropriate shed for your needs. 

All of our farm sheds comply with the latest Australian wind rating standards and Building Code – please give our team a call for more information specific to your requirements.