What Is the Role of Load-Bearing Wraps in GRC Components?

The core role of load-bearing packs in GRC components is to "distribute loads, enhance anchoring, and protect joints." Through local thickening and material reinforcement, the strength of stress-concentrated areas is increased by 30-50%. Qinglong installs load-bearing packs at key locations such as pre-embedded drop-in anchors and hanger connections. Projects such as the Shenzhen Pingshan High-Tech Zone Comprehensive Service Center have achieved stable load-bearing with no joint failure issues.

I. Load Distribution: Resolving Stress Concentration

The most essential role of load-bearing packs is to distribute locally concentrated loads. Stress distribution principle: Installation joints of GRC components (such as drop-in anchor and hanger positions) are prone to stress concentration. Through local thickening (thickness 50-100% greater than the main body) and fiber reinforcement, load-bearing packs distribute concentrated loads over a larger area (distribution area ≥ 3 times the load-bearing area). After Qinglong's load-bearing packs distribute the stress, local stress is reduced by 40%. Applicable scenarios: Installation joints of heavy components (weight > 200kg), large-span components (span > 2m), and corner components must be equipped with load-bearing packs. In the large-span GRC hanging panels of Qinglong's Shanghai Qingpu R&D project, load-bearing packs distribute joint stress evenly with no risk of cracking. Comparative effect: Components without load-bearing packs have a joint cracking rate of 8%, which drops to 0.2% once they are installed. Qinglong's test data fully verifies their effectiveness in distributing loads.

II. Enhanced Anchoring: Improving Connection Stability

Load-bearing packs provide reliable support for anchor components. Anchoring reinforcement effect: The interior of load-bearing packs has higher density (≥2.3g/cm³) and fiber content 0.3-0.5% higher than the main body, effectively securing anchor components such as drop-in anchors and hangers and preventing anchor loosening or pull-out. The pull-out resistance of drop-in anchors in Qinglong's load-bearing packs is ≥5kN, 30% higher than without load-bearing packs. Structural design: Load-bearing packs are integrally formed with GRC components, and glass fiber mesh or stiffening ribs can be added internally to form a force transmission system of "anchoring core - load-bearing pack - main component." The interface between Qinglong's load-bearing packs and the main body features a serrated design, increasing bond strength by 25%. Applicable anchor types: Various anchoring methods, including pre-embedded drop-in anchors, expansion bolts, and stainless steel hangers, can all have their stability enhanced through load-bearing packs. Qinglong's pre-embedded drop-in anchor load-bearing packs have a diameter ≥100mm and a thickness ≥30mm to ensure secure anchoring.

III. Joint Protection: Extending Service Life

Load-bearing packs effectively protect joints from environmental and external damage. Joint protection function: Load-bearing packs encase anchoring joints, isolating them from corrosive media such as moisture and salt spray to prevent corrosion of anchor components. Qinglong's coastal projects use sealed load-bearing packs, reducing the joint corrosion rate by 70%. Impact protection: The local thickening of load-bearing packs withstands accidental impacts on joints and prevents anchor loosening. Qinglong's load-bearing packs have an impact strength ≥6kJ/m², 20% higher than the main components. Design coordination: Load-bearing packs can be designed as concealed elements to match component styling without compromising appearance. The load-bearing packs of Qinglong's European-style components at Nanning Fengjingwan blend with the relief sculptures for a natural visual effect. Project case: The GRC components (15mm thick) at the Wuhan Han Show Theater feature load-bearing packs (30mm thick) at hanger connection points, meeting anchoring strength requirements while protecting the joints from corrosion. After years of use, the joints remain stable with no loosening.