Gas struts (also known as gas springs or lift supports) are a small component that can make a big difference to usability, safety, and convenience. From vehicle canopies and toolboxes to camper trailers, access hatches, and industrial equipment, gas struts provide smooth lifting assistance and controlled closing.

If you’ve ever lifted a canopy door that stays perfectly open or opened a heavy toolbox lid with ease, there’s a good chance a gas strut is doing the hard work behind the scenes.

In this guide, we’ll explain why gas struts are such a useful upgrade, provide a step-by-step guide to selecting the correct gas strut, include high-ranking keywords for Australia, and show a simple gas strut force calculator method.

Why Gas Struts Are So Useful

Gas struts use compressed gas sealed inside a cylinder to create controlled force. When the strut extends, it helps lift and support weight, making heavy lids, panels, and doors easier and safer to operate.

Key Benefits of Gas Struts

Effortless Lifting
Gas struts assist with lifting heavy lids and doors, reducing strain and making operation smoother.

Improved Safety
They prevent lids or panels from suddenly falling, reducing the risk of injury or damage.

Hands-Free Operation
Many gas strut setups hold panels open automatically, allowing you to work with both hands.

Controlled Closing
Gas struts provide resistance when closing, preventing lids from slamming shut.

Professional Finish
Adding gas struts transforms a basic lid or hatch into a smooth, premium feeling mechanism.

Common Applications for Gas Struts

Gas struts are used across many industries and everyday products.

Automotive & 4WD

• Canopy windows

• Gullwing canopy doors

• Ute tray toolboxes

• Engine bonnets

• Camper trailer lids

• Caravan storage hatches

Touring & Camping

• 4WD canopy side windows

• Fridge slide lids

• Roof rack storage boxes

• Battery compartments

Marine

• Boat storage hatches

• Engine covers

• Seat compartments

Industrial & Workshop

• Electrical cabinets

• Machinery access panels

• Workshop storage boxes

• Service access doors

Because gas struts are available in many lengths and force ratings, they can be installed on almost any hinged lid or panel.

Browse the full range of heavy duty gas struts available at TL Spares:
https://tlspares.com.au/collections/tl-engineering-gas-struts-heavy-duty-gas-lift-struts

How to Select the Correct Gas Strut

Choosing the correct gas strut is essential for smooth operation. If the strut is too strong, the lid will be difficult to close. If it's too weak, it won’t hold the lid open.

Follow this step-by-step guide.

1. Measure the Extended Length

The extended length is the measurement from the centre of one mounting ball to the centre of the other when the strut is fully open.

This determines how far your lid or panel can open.

Tip:
If replacing an existing strut, measure the old one centre-to-centre.

2. Measure the Compressed Length

The compressed length is the centre-to-centre measurement when the strut is fully closed.

If the compressed length is too long, the lid may not close properly.

3. Determine the Required Force (Newton Rating)

Gas struts are rated in Newtons (N), which indicates lifting force.

Typical ratings include:

If replacing an existing strut, check the number printed on the cylinder such as 450N.

Gas Strut Force Calculator Guide

If you’re installing gas struts on a new project, you can estimate the required force using a simple method.

Step 1: Weigh the Lid

Determine the weight of the lid or panel in kilograms.

Example:
A toolbox lid weighs 20 kg.

Step 2: Convert Weight to Newtons

Multiply the weight by 9.81 to convert kilograms to Newtons.

Example calculation:

20 × 9.81

Result:

196 N total force required

Step 3: Divide by Number of Struts

Most lids use two gas struts, meaning the load is shared.

196 ÷ 2

Result:

98 N per strut

In this case, you would select approximately 100N gas struts.

Step 4: Adjust for Mounting Geometry

Because mounting angles affect performance, it's usually recommended to increase the calculated force by 10–30%.

This ensures the lid lifts smoothly and stays open.

Final example:

100N × 1.2 = 120N recommended strut rating

When Should You Replace Gas Struts?

Gas struts lose pressure over time. Signs they need replacing include:

• Lid slowly dropping

• Weak lifting assistance

• Difficulty holding open

• Visible oil leakage

Most quality gas struts last 3–7 years depending on usage and environment.

Gas Struts: A Small Upgrade That Makes a Big Difference

Gas struts may be a simple component, but they dramatically improve the functionality of many everyday items. Whether you're upgrading a 4WD canopy window, toolbox lid, camper trailer hatch, or workshop cabinet, the right gas strut provides smooth operation, increased safety, and a more professional finish.

By selecting the correct length, force rating, and fittings, you can easily upgrade existing equipment and enjoy reliable performance for years.

Browse the full range of heavy duty gas struts available at TL Spares:
https://tlspares.com.au/collections/tl-engineering-gas-struts-heavy-duty-gas-lift-struts