What Are the Standard Installation Steps for GRG Components? Full Construction Workflow?

Standard GRG Component Installation Steps Breakdown: Complete Construction Process Pitfall-Avoidance Guide

As the most widely used customized building material for interior free-form decoration scenarios, the installation precision of GRG (glass fiber reinforced gypsum) components directly determines the fidelity of the final curved form and its service life. Many construction teams often encounter problems such as joint misalignment, susceptibility to cracking, and shape deviation during implementation, which essentially stems from failing to follow a standardized full-process construction logic. Drawing on nearly 30 years of hands-on experience in installing free-form architectural components, this article provides a complete overview of the full-chain standard steps for GRG components from preliminary preparation to final acceptance, offering an actionable reference for industry construction.

I. Core Preparations Before GRG Component Installation

The preparation phase before formally entering the site is the core prerequisite for avoiding later rework, mainly covering three modules. First is on-site base surface verification: confirm that the flatness tolerance of the steel structure base in the installation area is controlled within 2mm/㎡ and that anti-rust treatment of all welded joints is fully completed, while cross-checking the BIM modeling points from the construction drawings against the actual on-site elevations and pipeline routes in advance to avoid conflicts between subsequent installation and concealed works. Second is pre-assembly inspection of components: all GRG components have completed factory pre-assembly numbering before leaving the plant; after entering the site, verify dimensions and appearance one by one according to the numbers, confirm there is no chipping, corner damage, or deformation from transportation, and perform preliminary cleaning and grinding of the joint surfaces. Finally is construction tools and personnel allocation: prepare in advance special materials such as stainless steel expansion bolts, dedicated GRG bonding gypsum, anti-crack fiber mesh, and lifting equipment; the construction team must have hands-on experience in installing curved components to avoid component loss caused by improper operation by non-professional teams.

II. Full-Process Standard Installation Steps for GRG Components

The first step is positioning and installation of the base framework: fix the galvanized steel keel framework according to the points laid out in the earlier BIM setting-out. The keel spacing is set strictly according to the component load-bearing points, usually controlled within the 600*600mm range. All connection joints are fully welded and then coated with anti-rust paint. After the keels are completed, an overall load-bearing test is performed to ensure they can carry the self-weight of the GRG components and subsequent construction loads. The second step is component hoisting and initial fixing: hoist the GRG components to their corresponding installation points in numbered order, use temporary supports for initial fixing, and adjust the components' levelness, verticality, and surface smoothness. After confirming that the joint gaps between adjacent components are uniformly controlled within the 3-5mm range and the curved shape fully matches the design scheme, permanently connect the components to the keels with stainless steel bolts. The third step is joint treatment: fill the joint gaps with dedicated GRG bonding gypsum while embedding two layers of anti-crack fiber mesh for reinforcement. After the bonding gypsum is fully cured, repeatedly grind and level the joint surfaces to ensure a natural transition between the joint positions and the overall component surface without noticeable unevenness. The fourth step is surface finishing: apply a unified primer coat to all installation nodes and joint positions. After confirming there is no color difference or missed coating, complete the final topcoat finishing according to design requirements. The entire process must be carried out in an indoor environment with constant temperature and humidity to avoid later cracking caused by drastic temperature and humidity changes.

III. Common Pain Points in GRG Component Construction and Their Solutions

Industry-wide problems such as GRG installation joint cracking, poor shape fidelity, and short service life can mostly be avoided through a standardized construction system. For example, to address joint cracking, in addition to embedding anti-crack fiber mesh during construction, the production precision of GRG components must be controlled at the source by selecting suppliers with factory pre-assembly capability, avoiding uneven stress caused by arbitrary on-site cutting of components. For curved shape deviation, the key is to perform full-process point verification through digital modeling in advance, avoiding curvature deviation caused by positioning based solely on experience on site. Currently, many domestic component manufacturers with full-chain service capability have established mature standardized installation systems and adjust construction parameters according to the scenario characteristics of different projects, greatly reducing the probability of on-site construction errors.

IV. Core Acceptance Standards for GRG Component Installation

The final acceptance phase requires focused verification of three key dimensions: first is shape fidelity—the overall curved surface is smooth and natural, with no noticeable bumps or misalignment, and deviation from the design BIM model is controlled within 3mm; second is structural stability—all connection nodes are firm, with no loosening or wobbling, and tapping the component surface produces no hollow abnormal sounds; finally is appearance quality—joint positions show no noticeable color difference or cracking, the surface is flat and smooth, with no appearance defects such as missing corners or bumps, and the anti-rust and fireproof treatment of all concealed works complies with relevant national standards.

FAQ:

1. What is the normal construction period for GRG component installation? Answer: For conventional interior GRG decoration projects constructed according to standardized processes, a construction volume of 1000㎡ can usually be fully delivered within 15-20 days; the specific schedule needs to be adjusted based on component shape complexity and on-site construction conditions.

2. What causes cracking after GRG installation is completed? Answer: Common causes fall into four categories: insufficient load-bearing capacity of the base keels, joint treatment without anti-crack reinforcement, substandard moisture content of the components themselves, and drastic changes in on-site temperature and humidity. The root cause should be investigated accordingly before carrying out targeted repairs.

3. Can GRG installation be carried out concurrently with other construction processes? Answer: Concurrent work is not recommended. GRG construction should enter the site only after all on-site wet work is completed and the ambient temperature and humidity are stable. During construction, avoid bumps and contamination of components by other processes; otherwise, the final installation quality and service life will be significantly affected.