Answer the 358 security fence questions buyers actually ask before opening a quote.

"358" refers to the approximate mesh opening dimensions: roughly 3 inches × 0.5 inches (76.2 mm × 12.7 mm). The narrow horizontal opening prevents footholds and handholds — a person's fingers cannot grip the small opening, and standard tools have difficulty gaining purchase. The "8" in 358 also references the wire gauge category (approximately 8 gauge / 4.0 mm wire), though exact wire diameters vary by manufacturer and security specification. The result is a fence panel that provides both perimeter security and good visibility for CCTV and patrol monitoring, making it one of the most widely used high-security mesh products globally for prisons, airports, military facilities, and critical infrastructure.

The term "anti-climb fence" is used interchangeably with 358 because the primary design purpose is to resist unauthorized climbing rather than to provide privacy or noise reduction.

Security level selection depends on the project risk assessment, the threat model, and any required delay-rating standard. Three main tiers are commonly discussed:

• Standard 358 anti-climb: 4.0 mm wire, 76.2 × 12.7 mm mesh opening, hot-dip galvanized finish. Suitable for industrial sites, warehouses, logistics yards, and general controlled-access perimeters where the primary concern is unauthorized climbing rather than forced intrusion.
• Heavy-duty / anti-cut enhanced: 5.0 mm or 6.0 mm wire diameter, same mesh opening. The heavier wire increases intrusion delay time and improves rigidity under load. Recommended for utility substations, correctional facilities, and sites where tool-based attack is a realistic threat.
• Certified delay-rated: Panels built and tested to standards such as LPS 1175 (UK Loss Prevention Standard) or ASTM F2781-15 (US Standard Practice for Fixed Enclosure Fencing). These require specific panel construction, post systems, and sometimes第三方 testing reports. Certification scope and rating level (e.g., SR1–SR5) must be confirmed before quotation.

Specify the threat model and any required delay-rating standard in the RFQ — whether LPS 1175, ASTM F2781, or another market-specific requirement — so the correct build path and testing route are included in the quotation from the start.

Two parameters define the 358 mesh panel specification:

• Mesh opening: Standard 358 opening is 76.2 × 12.7 mm. Custom anti-climb openings can be produced (e.g., 50 × 12.7 mm for higher-security variants) for project-specific requirements. The horizontal dimension is the anti-climb key; the vertical dimension relates to rigidity and wire spacing.
• Wire diameter: Common options run from 3.0 mm to 6.0 mm. The heavier the wire, the higher the rigidity and intrusion delay. Standard export specification is typically 4.0 mm; higher-security projects use 5.0 mm or 6.0 mm.

Panel dimensions and quantity also need to be specified: panel heights from 1.2 m to 3.0 m or taller are common for prison and airport perimeters; panel widths of 2.0 m, 2.5 m, or 3.0 m affect post spacing and fixing cost.

For buyers comparing 358 against standard welded mesh: 358 has a tighter horizontal opening and heavier wire than typical 3D/V-mesh or double-wire panels, which trade some anti-climb performance for lower cost and easier handling.

Standard export heights for 358 fence panels range from 1.2 m to 3.0 m, with 2.0 m, 2.4 m, and 3.0 m being the most commonly quoted sizes. Height selection is driven by the security assessment:

• 1.2 m–1.8 m: Suitable for industrial yards, logistics perimeters, and sites where the threat is unauthorized pedestrian access rather than determined intrusion. Often used for warehouse and factory boundaries.
• 2.0 m–2.4 m: The most common range for airport perimeters, correctional facility inner zones, and commercial security perimeters. Provides a deterrent presence and good anti-climb performance.
• 2.4 m–3.0 m+: Used for prison walls, military installations, nuclear facilities, and high-threat infrastructure where maximum perimeter delay time is required. May require stiffer posts and topping reinforcement.

Custom heights are supported for project-specific requirements. When requesting a quote, specify the required height, total perimeter run length, panel width preference, and any minimum ground clearance or below-ground post embedment depth required.

Three finish routes cover the full range of 358 fence applications:

• Hot-dip galvanized only: Zinc coating applied after welding. Zinc weight typically 275 g/m² for standard production. Best for inland industrial, utility, and budget-focused projects. The zinc-grey appearance is functional and accepted in most industrial environments. Do not use without top-coat in high-humidity or coastal environments — white rust will form on bare zinc surfaces within one season.
• Pre-galvanized + powder coat: Steel is zinc-coated before fabrication, then powder-coated over the zinc layer after welding. Produces a clean, colored finish. Coating thickness 60–120 µm. Color options: any RAL color for commercial, municipal, or residential-facing installations. The powder coat layer provides the visible finish; the zinc layer beneath provides cathodic protection.
• Hot-dip galvanized + powder coat (duplex): Full hot-dip galvanizing after fabrication, then powder coat over the zinc. Best corrosion protection available. Suitable for coastal, high-salinity, and high-humidity environments. Recommended for airport perimeter and coastal infrastructure projects. Higher cost but longer maintenance-free life. Standard RAL colors available; custom colors for larger orders.

For airport and coastal projects, specify the duplex route with 275 g/m² minimum galvanizing and powder coat top-coat. Confirm the zinc weight and coating thickness in writing before the PO — this is a common post-delivery dispute point.

358 fence posts and fixings must be matched to the panel height, security level, and installation condition. Common configurations:

• Square/Rectangular posts: Typically 60 × 60 mm, 80 × 80 mm, or 100 × 100 mm depending on panel height and loading. Wall thickness 2.0–4.0 mm. Posts are either surface-mounted with base plates or buried and concrete-set.
• Clamp bar fixing: A flat or C-shaped clamp bar runs along the face of the panel and is bolted through the post. Used for standard security installations. Provides a clean appearance and even load distribution.
• Weld-through fixing: Panels are welded directly to the posts. Strongest mechanical connection but cannot be dismantled. Used for maximum-security installations where disassembly is a concern.
• Base plate fixing: Surface-mounted posts with anchor bolts. Useful for retrofit installations, concrete pads, or situations where ground disturbance is restricted.
• Topping-ready posts: Posts designed with a top rail or mounting channel for V-arms, barbed wire, razor wire, or electronic detection systems. Post top plate or channel section must be specified when ordering.

Specify post type, fixing method, and whether topping coordination is required in the first RFQ message — the post specification affects both panel pricing and installation logistics.

Two system additions are commonly quoted alongside 358 fence panels:

• Gates: Single pedestrian gates (900–1200 mm width) and double vehicle gates (single swing 3000–6000 mm; bi-fold; or sliding) are produced to match the 358 panel profile and security level. Gate frames use the same wire diameter and mesh as the fence panels. Hardware includes heavy-duty hinges, slam latches or lock cylinders, drop bolts, and ground anchors. For high-security sites, anti-tamper hinges and reinforced gate posts are recommended. Specify gate type, width, operation (manual or automated), and any access control hardware in the RFQ.
• Toppings: The most common topping options for 358 perimeter systems include V-arms (35° or 45° angle), barbed wire (single or double strand), razor coil / concertina tape, and electronic detection systems (strain-based or fiber optic). Topping type is determined by the security threat assessment. For projects requiring certified delay ratings, topping and post systems must be included in the testing scope — confirm this before quotation.

Gates and toppings should be quoted together with panels and posts in the same RFQ, not separately. Sourcing gates and toppings from the same supplier as the panels ensures consistent wire diameter, mesh matching, and coating quality across the full perimeter.

Documentation support varies by certification scope and market requirement. The most commonly requested types:

• Material test reports: Mill certificates for steel wire and tube confirming wire diameter, tensile strength, and zinc coating weight. Available on request for each production batch.
• Coating thickness and adhesion reports: Galvanizing weight verification and powder coat thickness measurement records, available per production run.
• Weld quality records: Visual inspection and dimensional check records for mesh panel welds, confirming wire spacing, panel squareness, and weld integrity.
• Third-party testing: If a delay-rating standard such as LPS 1175 or ASTM F2781 is required, the fence system (panels + posts + fixings + toppings) must be tested as an assembly, not as individual components. Third-party testing adds 8–16 weeks to the project timeline and significant cost. Confirm whether testing is required before the quotation stage.
• Factory audit support: ISO 9001 documentation, production capability overview, and workshop photos are available for buyer qualification and sourcing team approval.

Specify the documentation requirements — material certs, coating reports, weld inspection records, or third-party testing — in the initial RFQ so they are included in the quotation scope from the start.

MOQ: Standard production MOQ for 358 fence panels is typically 20–50 panels per size/height specification. Lower quantities can be supported for sample and trial orders at a higher unit cost. Distributors and repeat-order buyers should confirm the MOQ structure for their specific size and finish combination before the first PO.

Sample panels: 1–2 panels per specification are available for quality verification before full orders. Samples are charged at production cost plus shipping. For high-security projects, a sample panel is strongly recommended to verify wire diameter, mesh consistency, weld quality, and coating finish against the project specification.

Documentation pack: Material certs, coating reports, drawing packs, and test report copies are prepared as part of the quotation process. Request the combined spec + documentation pack in the first RFQ message.

Lead time: Standard production lead time is 3–5 weeks for galvanized-only panels; 4–7 weeks for powder-coated or duplex-finish panels. Certified/tested systems require an additional 8–16 weeks for third-party testing and certification. Confirm lead time expectations before PO to avoid installation scheduling conflicts.