The "Lightweight Revolution" in Cold Chain Infrastructure: How Fabric Ducts Reshape Load-Bearing Logic

In high-rise cold storage facilities and renovation projects, the structural load-bearing margin is often the key factor determining the feasibility of a ventilation plan. Traditional metal ducts (including insulation) can weigh 15–25 kg per meter. In retrofit projects with limited headroom, this often necessitates additional roof reinforcements or support columns, significantly driving up construction costs and crowding out valuable storage space. Fiber Fabric Ducts​ are emerging as the optimal solution for "load reduction" in cold chain infrastructure, leveraging their gram-level weight to relieve structural stress.

The core conflict in high-rise cold storage and renovation projects lies in balancing "self-weight and space." The massive static load of metal duct systems significantly increases the internal forces on steel beams, forcing design institutes to specify higher-grade steel or larger cross-sections, leading to soaring civil construction costs. In contrast, fabric ducts weigh a mere 0.3–0.8 kg per meter, roughly 1/40th the weight of metal systems. Their impact on the main structure is almost negligible. This "lightweight" advantage allows structural engineers to eliminate dedicated duct supports, instead utilizing existing grid nodes for suspension, vastly simplifying the force-bearing system.

This engineering value is particularly evident in three cold chain scenarios:

• Multi-Story High-Rack Cold Storage:​ In a project with a ceiling height of only 4.5 meters, switching to fabric ducts reduced the ventilation system weight by approximately 2.8 tons. This allowed for a reduction in steel beam section height, freeing up 12 cm of vertical space for stacker crane rails and significantly improving storage capacity.
• Retrofitting Old Cold Storage:​ In facilities operating for over 20 years, the structural redundancy is often minimal. The "zero-burden" nature of fabric ducts allows for the addition of ventilation systems without expensive structural reinforcement, saving millions in civil reconstruction costs.
• Temporary Transshipment Cold Storage:​ In modular temporary cold storage, a lighter ceiling load translates directly to fewer support columns, effectively lowering the unit construction cost and improving land use efficiency.

It is important to note that cold chain-specific fabric ducts must pass tensile strength and low-temperature toughness tests​ to ensure dimensional stability under long-term tension. As land costs continue to rise, fiber fabric ducts are evolving from mere ventilation equipment into "invisible assistants" for structural optimization—using the lightness of material science to uphold the efficiency and intensity of cold chain infrastructure.