Void Former

Welcome to Trans Vent – Innovators in Galvanized Steel Void Tubes with Spiral Lock Seam Construction  

At Trans Vent, we pride ourselves on pushing the boundaries of construction technology, and our galvanised steel void tubes with spiral lock seam construction are a testament to that commitment. As your premier void tube manufacturer, we bring you a cutting-edge solution designed to revolutionise your construction projects. With manufacturing facilities in New South Wales and Queensland, and over 50 years of Australian expertise, we produce high-strength, lightweight void formers engineered to reduce concrete volume, dead load, and overall project costs in structural concrete applications. 

Our void formers deliver excellent radial stiffness and dimensional stability, enabling them to withstand concrete placement pressures with minimal deformation while maintaining a permanent or semi-permanent void. 

Our Galvanized Steel Void Tubes with Spiral Lock Seam Construction 

• Spiral Lock Seam Precision: Trans Vent’s void tubes are uniquely manufactured using spiral lock seam construction. This innovative technique ensures precision in design and construction, providing a seamless, sturdy, and reliable solution for creating voids in concrete structures. 

• Enhanced Structural Integrity: The spiral lock seam construction enhances the overall structural integrity of our void tubes. This method reinforces the tube and ensures a consistent diameter throughout, making them ideal for applications where precision is crucial. 

• Quick and Efficient Installation: The spiral lock seam design facilitates quick and efficient installation, saving you time and labour costs on your construction projects. The seamless assembly ensures a smooth fit, allowing for hassle-free integration into various applications. 

Why Choose Trans Vent Void Formers? 

• Coating: Z275 galvanised for corrosion resistance during concrete pour and service life 

• Spiral lock-seam tubing for superior radial strength-to-weight ratio 

• Continuous helical seam for consistent structural performance 

Void Former Details 

• Diameters: 150 mm to 2400 mm (nominal outside diameter) 

• Wall Thickness: 0.5mm to 2.0mm depending on project application. 

• Lengths: Manufactured to exact project requirements. 

• Corrugation profiles: Single Corrugation (PKG), Double Corrugation, Triple Corrugation and CLV Corrugation.  

• Small-Diameter Range: Alternative void former option are available including Trans vent’s grout tube range for smaller voids, ranging from 40mm to 135mm dia. 

• Technical Data & Compliance: Detailed load/deformation data, engineering calculations, or project-specific recommendations can be provided upon request. 

• Additional items: Trans Vent has the capability to manufacture and supply a range of accessories with our void formers including end caps and joiners. 

Performance Characteristics 

• High radial stiffness to resist deformation during concrete vibration and placement. 

• Lightweight design for easy handling and installation with minimal site support. 

• Excellent strength-to-weight ratio, optimising structural efficiency. 

• Non-absorbent and non-degradable compared to cardboard or polystyrene alternatives. 

• Smooth internal and external surfaces for clean void formation. 

Quality Assurance & Requirements 

• Precision spiral forming ensures tight diameter and roundness tolerances 

• Full in-house quality control. 

• Every tube undergoes inspection for seam integrity and dimensional accuracy.