How to Set Up Temporary Support for GRC Panel Installation: Standard Requirements and Practical Key Points

How to Set Up Temporary Supports During GRC Panel Installation: Analysis of Regulatory Requirements and Practical Key Points

In GRC (glass fiber reinforced concrete) component installation projects, setting up the temporary support system is a key step in ensuring construction safety and quality. As an industry-leading enterprise with 28 years of experience in detailed design, manufacturing, and construction of UHPC/GRC/GRG/GRP materials, Qinglong Group draws on its participation in compiling the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018) and the practice of over a thousand engineering projects to provide systematic technical guidance for designers and contractors from both regulatory and practical perspectives.

I. Core Regulatory Requirements for Temporary Supports of GRC Panels

According to national standards and Qinglong's enterprise technical standards, temporary support setup must meet three core principles: first, clear load transfer paths—the support system must bear the GRC panel self-weight (typically 80-120kg/㎡) and construction live loads, with loads evenly transferred to the main structure through primary and secondary keels; second, stability redundancy design—vertical post spacing should be ≤1.2m, horizontal bar lift spacing ≤1.8m, with diagonal braces and sweeping bars set up to form an overall stable structure; finally, adjustable precision control—the top of the supports must be equipped with screw adjustment devices allowing ±5mm height fine-tuning to meet installation tolerance requirements.

II. Key Points for Material and Joint Design of GRC Panel Temporary Supports

Qinglong commonly uses a Q235B section steel support system in its projects, with vertical posts made of Φ48×3.5mm steel tubes and horizontal bars of the same specification connected with right-angle couplers. For irregular GRC components (such as double-curved panels and openwork relief panels), custom section steel truss supports are required, with BIM technology used to simulate load distribution and ensure support points coincide with the component's center-of-gravity line. Key joint treatments include: expansion bolts (M12×100mm, tensile capacity ≥15kN) for connecting supports to structural surfaces; and 50mm-thick rubber blocks at contact points between GRC panels and supports to prevent stress concentration from cracking the panel surface.

III. Dynamic Support Management During Phased Construction

Throughout the full GRC panel installation cycle, temporary supports undergo three key adjustments: in the initial positioning stage, supports are adjusted to keep panel axis deviation within 3mm; in the grouting and curing stage, supports must remain stable until the structural adhesive (such as Qinglong's dedicated epoxy adhesive) reaches 70% strength (typically 24 hours) before they may be released; in the system acceptance stage, a static load test at 1.5 times the design load is required, with observed support deformation not exceeding 2mm. Notably, for GRC curtain walls over 6m in height, Qinglong's technical team adds unloading devices to achieve staged load relief and avoid sudden load impacts.

IV. Solutions to Common Industry Problems and Case References

To address the support instability issues that frequently occur in projects, Qinglong has summarized a "Three Checks and Three Rectifications" prevention mechanism: check whether support spacing meets the calculation document requirements, check coupler tightening torque (must reach 40-65N·m), and check vertical post plumbness (deviation ≤1/200). In a cultural center project in Nanjing, Qinglong's patented telescopic support system successfully solved the installation stability challenge of a large-span GRC sunshade (cantilevered 3.5m), saving 20% of the construction period compared with traditional support solutions.

As a national high-tech enterprise and a contributor to GRC standard development, Qinglong consistently adheres to the quality policy of "meticulousness and the pursuit of excellence." Its temporary support construction methods have passed the scientific and technological achievement appraisal of the Ministry of Housing and Urban-Rural Development. Before GRC installation, project owners are advised to commission a professional team for specialized support system design and to select a manufacturer with full-chain capabilities in detailed design, manufacturing, and construction installation (such as Qinglong Group) to provide technical support, safeguarding project safety and quality at the source. To obtain the Technical White Paper on Temporary Supports for GRC Components, standardized technical guidance is available through industry association channels.