Outdoor Deck Box Gas Struts Pair – 400mm 400N – Heavy Duty Lid Support – 4x L Brackets
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Upgrade your outdoor storage with a powerful, controlled and heavy-duty lid lifting system. This 400mm 400N gas strut pair is engineered for deck boxes, garden storage boxes and outdoor cushion chests with larger, heavier lids that require maximum lift assistance and stable hold-open performance.
📏 Technical Specifications
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Force Rating: 400N per strut (800N total support per pair)
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Extended Length: 400mm
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Stroke Length: 150mm
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End Fitting: 10mm Ball Socket (M6 threaded ball studs)
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Bracket Type: 4x Heavy-Duty L Brackets Included
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Supply: Matched Pair (Left & Right installation)
Recommended Lid Depth: 500–800mm (hinge to front edge)
Suitable Lid Weight: 40–72kg (lid only, when using two struts)
🌿 Designed for Outdoor Storage Systems
This configuration is tailored for outdoor deck boxes and heavy-duty garden storage units where deep, reinforced lids require extended reach and strong lift support.
- Large and deep lid constructions
- Wind-exposed outdoor installations
- Thick composite or reinforced timber lids
- Storage units carrying heavier equipment or accessories
The 400N rating delivers maximum lift assistance while maintaining controlled and secure opening behaviour.
🔩 4x L Bracket Mounting System
This kit includes four reinforced 90° L brackets, providing:
- Superior mounting stability inside plastic or composite deck boxes
- Improved alignment for deep lid frames
- Higher structural strength compared to flat bracket-only systems
- Even load distribution across mounting points
Recommended for reinforced outdoor storage boxes with internal ribbing or timber construction.
🛠 Installation Positioning Guide
- Install one strut on each side of the lid
- Mount approximately 25% down from the hinge on the lid panel
- Position lower bracket 100–160mm below the top inside frame (depending on box depth)
- Ensure slight compression when fully closed for correct preload tension
Correct geometry is essential for optimal lifting performance. Improper positioning may reduce lifting efficiency.
⚠ Choosing the Correct Strength
- If your lid weighs less than 40kg → 400N may feel too strong
- If your lid exceeds 72kg → consider reinforced hinge systems
- If your lid depth exceeds 800mm → consider extended-length configurations
Always calculate lid weight without contents. This rating applies to the lid panel only.
🛡 Safety & User Experience Benefits
- Prevents sudden lid drop due to wind or accidental release
- Keeps lid securely open while accessing contents
- Reduces stress on hinges and mounting screws
- Improves long-term durability of outdoor storage systems
🏡 Ideal Applications
- Heavy-duty plastic deck boxes
- Large garden cushion storage chests
- Outdoor patio storage trunks
- Reinforced composite or timber garden units
🇬🇧 AUTORCE Outdoor Performance Standard
- Quality tested for reliable lift performance
- Fast UK dispatch
- 30-day returns on unused items
- UK-based support team
Enhance your outdoor storage with maximum-strength, professional-grade lid support. Order today and upgrade your deck box performance.
