ZTO Express Fujian Minzhong Cold Chain Project: Taiku Long-Span Post-Tensioned Flat Slab in E-commerce Cold Chain Warehousing

Priority on flexible racking layout: The product mix in fresh e-commerce fluctuates seasonally and with market trends, requiring periodic racking reconfiguration. In traditional small-bay cold stores, columns impose rigid constraints, forcing racking layouts to circumvent them and limiting flexibility. Need for smooth sorting workflows: Fresh e-commerce cold storage involves high-intensity, time-sensitive sorting operations that demand unobstructed movement paths for personnel and equipment. Dense columns in small-bay layouts disrupt sorting aisles and compromise overall workflow efficiency.

Long-span racking adaptability: The 12-meter column spacing significantly increases the freedom of racking arrangement within the storage area. Based on standard pallet widths and forklift aisle dimensions, multiple racking configurations—from pallet racking to cantilever racking, and from single-deep to double-deep—can be accommodated within the 12-meter bay, improving the structural solution's alignment with operational needs. Structural engineering analysis: Using a three-dimensional finite element analysis program imported from the United States, combined with proprietary post-tensioning optimization algorithms, the 12-meter long-span post-tensioned flat slab was meticulously analyzed to meet load-bearing and crack control requirements under low-temperature conditions while optimizing material usage. Plan review coordination: As the super-long-span post-tensioned slab was unconventional locally, BICP provided a comprehensive 3D FEA report and specialized post-tensioning design documentation, facilitating technical consultations with the local plan review authority and successful approval. Local construction support: BICP coordinated a qualified post-tensioning subcontractor with relevant experience in Fujian and deployed technical engineers for on-site supervision during critical construction phases. Given the region's hot and humid summer climate, concrete mix design and curing procedures were specifically enhanced to mitigate high-temperature effects.

ZTO Express Fujian Minzhong Cold Chain Project: Taiku Long-Span Post-Tensioned Flat Slab in E-commerce Cold Chain Warehousing

Project Background

With the rapid growth of the e-commerce fresh food sector, logistics companies' demand for cold chain warehousing has evolved from simple temperature-controlled storage to integrated services including receiving, sorting, repackaging, and distribution. ZTO Express established its smart express e-commerce industrial project in Minzhong (Lianjiang), Fujian, with the cold storage facility serving as a regional distribution hub for fresh e-commerce goods within Fujian Province. This role imposes distinct operational characteristics: high inventory turnover (reflecting the 'fast-in, fast-out' nature of fresh e-commerce), diverse product categories (fruits, vegetables, seafood, meat, etc., with varying temperature requirements), and simultaneous use of forklifts and automated sorting equipment (demanding clear floor space and flexible racking layouts). Traditional small-bay cold storage designs amplify constraints in this scenario: dense columns interfere with sorting path planning, limit racking configurations, and hinder adaptability to rapidly changing product mixes. BICP proposed a 12-meter long-span post-tensioned flat slab solution, which was ultimately selected as the structural system for the cold storage facility.

Technical Challenges

Flexibility-Prioritized Racking Layout: The product mix in fresh e-commerce fluctuates seasonally and with market trends, requiring periodic racking reconfiguration. In traditional small-bay cold stores, columns impose rigid constraints, forcing racking layouts to circumvent them and limiting flexibility.

Smooth Sorting Workflow: Fresh e-commerce cold storage involves high-intensity, time-sensitive sorting operations that demand unobstructed movement paths for personnel and equipment. Dense columns in small-bay layouts disrupt sorting aisles and compromise overall workflow efficiency.

Solution

Long-Span Racking Adaptability: The 12-meter column spacing significantly increases the freedom of racking arrangement within the storage area. Based on standard pallet widths and forklift aisle dimensions, multiple racking configurations—from pallet racking to cantilever racking, and from single-deep to double-deep—can be accommodated within the 12-meter bay, improving the structural solution's alignment with operational needs.

Structural Engineering Analysis: Using a three-dimensional finite element analysis program imported from the United States, combined with proprietary post-tensioning optimization algorithms, the 12-meter long-span post-tensioned flat slab was meticulously analyzed to meet load-bearing and crack control requirements under low-temperature conditions while optimizing material usage.

Implementation Process

Plan Review Coordination: As the super-long-span post-tensioned slab was unconventional locally, BICP provided a comprehensive 3D FEA report and specialized post-tensioning design documentation, facilitating technical consultations with the local plan review authority and successful approval.

Local Construction Support: BICP coordinated a qualified post-tensioning subcontractor with relevant experience in Fujian and deployed technical engineers for on-site supervision during critical construction phases. Given the region's hot and humid summer climate, concrete mix design and curing procedures were specifically enhanced to mitigate high-temperature effects.

Delivered Value

After project completion, the cold storage facility entered the e-commerce fresh food operation phase. The flexibility in racking layout enabled by the long-span solution was demonstrated in practice: the owner adjusted the racking configuration multiple times to accommodate seasonal product changes, without being constrained by column positions.

Reference Significance

This project is a representative engineering practice of BICP's Taiku system in the e-commerce cold chain segment. It validates the applicability of long-span post-tensioned cold storage solutions in fresh e-commerce warehousing: the operational characteristics of high turnover, diverse product categories, and frequent racking adjustments align well with the technical advantages of reduced internal columns and enhanced racking flexibility. This provides a valuable engineering reference for similar e-commerce cold chain investors during structural system selection.

After project completion, the cold storage facility entered the e-commerce fresh food operation phase. The flexibility in racking layout enabled by the long-span solution was demonstrated in practice: the owner adjusted the racking configuration multiple times to accommodate seasonal product changes, without being constrained by column positions. This project serves as a representative engineering practice of BICP's Taiku system in the e-commerce cold chain segment. It validates the applicability of long-span post-tensioned cold storage solutions in fresh e-commerce warehousing: the operational characteristics of high turnover, diverse product categories, and frequent racking adjustments align well with the technical advantages of reduced internal columns and enhanced racking flexibility. This provides a valuable engineering reference for similar e-commerce cold chain investors during structural system selection.