Pre galvanized Z Channel

The Pre galvanized Z Channel by Shixinda is a thin-walled steel truss member manufactured from hot-dip galvanized steel strips as raw material, which undergoes a single-stage rolling process using high-precision cold bending equipment to form a Z-shaped cross-section; it is commonly referred to in the industry as a "Z-truss member".

Raw materials: finished galvanized strip steel (pre-galvanized; the zinc coating is uniform, eliminating the need for subsequent secondary galvanizing);

Forming process: Cold forming; no welding required, and no hot processing that would damage the galvanized coating;

Cross-section characteristics: asymmetric inclination of the upper and lower flanges, vertical web, with standard punched holes at both ends, designed for the installation of roof/wall panel self-tapping screws, tie rods, and supports;

Standard specifications: Available in various heights (100Z,120Z,140Z,160Z,180Z,200Z, etc.), with thicknesses ranging from 1.2–3.0 mm; length can be customized according to specific requirements.

Core Function Positioning

These components are primarily used as roof trusses and wall trusses for steel structure workshops, warehouses, livestock farms, photovoltaic greenhouses, logistics storage facilities, and steel-clad curtain walls; they serve as intermediate load-bearing elements connecting the steel main frame (H-beams or portal frames) to the color-coated steel cladding panels.

Load-bearing and load transfer: bears the loads from the roof's color-coated steel sheets, insulation layer, accumulated snow, and wind loads, and distributes these loads uniformly to the main steel structural beams and columns;

Enclosure Fixing: Provides a flat installation base for color steel roof panels, wall panels, light-transmitting panels, and insulation foam;

Structural stability: The system combines tie rods and support poles to form an integrated purlin system that resists lateral wind loads and prevents roof overturning or deformation;

Gradient Adaptability: The Z-shaped overlap design enables seamless continuous overlap across roof slopes, making it ideal for factory roofs with steep gradients.

Core Selling Points

1. Corrosion-resistant and durable

The substrate comes with a built-in galvanizing layer; the galvanizing process does not damage this layer throughout the entire manufacturing process, resulting in corrosion resistance that far surpasses that of black-coated spray-painted or post-galvanizing檩条;

Resistant to rainwater, moisture, and acid/alkali fogs; suitable for coastal areas, aquaculture farms, and light-corrosive chemical plant sites; service life: 15–25 years;

Eliminates post-installation painting maintenance, significantly reducing subsequent facility maintenance costs.

2. Excellent mechanical properties and reduced steel consumption

The Pre galvanized Z Channel offers a higher moment of inertia and greater bending strength compared to C-section steel of the same thickness, providing superior load-bearing capacity for long-span roofs;

These components can be joined end-to-end for continuous use without any discontinuities at the mid-span; they feature high overall structural stiffness and exceptional resistance to snow loads as well as typhoon-induced deformation.

Under identical loading conditions, thinner profiles can be selected to reduce the overall steel structure cost.

3. Efficient processing and installation

The factory performs pre-drilling of holes; the hole positions are standardized, eliminating the need for secondary drilling on-site;

Light self-weight; can be transported and assembled by a single person, thereby shortening the construction period for factory buildings;

Compatible with various building envelope materials such as color-coated steel sheets, photovoltaic roofing systems, and rock wool sandwich panels; offers high versatility.

4. Precise dimensions and uniform molding shape

The cold bending process features integrated forming, resulting in minimal straightness and torsion errors, ensuring a flat and distortion-free roof surface after installation;

Custom-length production eliminates excess waste and achieves high material utilization;

The galvanized steel strip has a smooth surface free of burrs, preventing scratches to the color-coated steel plate surface and reducing the risk of water leakage.

Common Technical Specifications

Shixinda galvanized steel strips and Z-shaped steel profiles are manufactured using high-quality galvanized steel strips conforming to national standards as raw materials, processed through an integrated automatic cold bending and rolling unit to achieve a standard Z-shaped cross-section. These products serve as specialized load-bearing purlins for roofs and walls in steel structure projects, offering a full range of specifications from 100Z to 250Z, with thicknesses ranging from 1.2 mm to 3.0 mm; they also support custom-length cutting and standardized pre-drilled holes.

The core function of this product is to bear roof loads and transmit forces; when paired with tie rods, it establishes a stable enclosure system. The Z-shaped overlap structure is well-suited for applications such as large-slope industrial plants, photovoltaic sheds, and warehousing workshops.

Shixinda Profile's core advantages are outstanding

The pre-galvanized forming process preserves the zinc coating without causing damage; the resulting zinc layer is uniform and highly corrosion-resistant, making it suitable for long-term use in coastal areas, aquaculture facilities, and light-corrosive industrial zones—eliminating the need for subsequent painting or maintenance. Its cross-sectional mechanical properties surpass those of standard C-section steel bars of the same thickness, enabling continuous butt-jointing to enhance overall stiffness; it also exhibits excellent resistance to deformation in regions subjected to heavy wind and snow loads, while requiring less steel material for equivalent load-bearing capacity. 

Throughout the manufacturing process, ShixinDa implements rigorous quality control to ensure flat profiles with no burrs and precise hole positioning; therefore, no secondary processing is required on-site, significantly saving time and labor during transportation and installation. Leveraging a stable steel mill supply chain, ShixinDa can provide customized non-standard dimensions based on specific requirements, offering short delivery cycles while balancing quality and cost. As a complete set of steel structural components for one-stop factory solutions, these products represent the optimal choice for roof trusses in steel structure engineering projects due to their exceptional cost-performance ratio.