Press Locked Grating — Precision Interlocking Construction
Press locked grating (also called interlocking or mechanical lock grating) is the architect's choice within the steel grating family. Instead of resistance-welding cross bars onto bearing bars, the cross bars are hydraulically pressed into precision-punched slots, locking the two together mechanically. Because nothing is welded, the finished panel has no weld beads, spatter, or heat discoloration — just a clean, uniform grid.
GoGrating manufactures press locked grating factory-direct in Anping, Hebei — China's wire-mesh and grating capital, where more than 70% of the country's output is produced. Every order is custom-fabricated to project specifications: panel dimensions, bar sizes, pitch, edge banding, and surface treatment are all built to your drawings. We supply EPC contractors, procurement engineers, and importers across the Middle East, Southeast Asia, Europe, Australia, and Latin America.
What is Press Locked Grating?
In press locked construction, the bearing bars — the load-carrying flats — are punched with slots at fixed intervals. Cross bars of matching section are then forced into those slots under high hydraulic pressure, deforming the metal at each intersection into a tight mechanical joint. The interlock is permanent and dimensionally precise: every opening in the panel is identical, and both faces of the grating sit flush.
This is what separates press locked grating from welded grating. Welded panels are the workhorse for heavy industrial loads, but each weld point leaves a visible bead. Press locked panels trade some heavy-load capacity for a cleaner appearance and consistent geometry, which is exactly what architectural and light-structural projects call for. For corrosive or non-conductive environments where steel is not ideal, see our FRP grating line as an alternative.
Specifications & Dimensions
Press locked grating is a made-to-order product, not a stock SKU — the table below shows the manufacturing ranges we work within, per YB/T 4001.1 and ANSI/NAAMM MBG 531. Because load capacity depends on bearing bar section, span, and pitch, we do not publish generic load figures; tell us your span and loading case and our engineers will return the applicable engineered load tables with your quotation.
Common configurations pair 25×3 to 65×5 mm bearing bars with the 19-space (approx. 30 mm) or 15-space (approx. 25 mm) pitch series, but slot patterns can be punched to suit denser or more open grids. Panels are supplied banded, with cutouts, notches, and kick plates fabricated per drawing.
Ideal Applications for Press Locked Grating
Press locked grating is specified wherever the grating will be seen as well as walked on. Typical uses include building facades and sunshade screens, decorative mezzanines and viewing platforms, interior and exterior walkways with light to medium foot traffic, stair treads in commercial buildings, suspended ceilings, ventilation grilles, tree grates, and infill panels for fencing, balustrades, and safety railing.
Architects and EPC contractors choose it for airports, stadiums, retail developments, office buildings, and public infrastructure where exposed grating contributes to the design language. For heavy vehicular or plant-floor loading, a welded panel is usually the better fit — our team will recommend the right type for each area of your project. Browse more project types on our applications page.
Why Choose Press Locked Grating?
Appearance is the headline benefit. With no weld marks at the intersections, the panel surface is flush and visually consistent — and that consistency survives finishing. Hot-dip galvanizing to ASTM A123 coats the pressed joints evenly, while stainless 304/316 versions can be left in their natural finish for premium architectural work. Painted and untreated (mill finish) options are also available. Press locked panels are typically lighter than welded equivalents of similar geometry, which helps on facades, suspended structures, and projects where installed weight matters.
As an Anping factory-direct supplier, GoGrating fabricates under ISO 9001 with CE marking available, and produces to YB/T 4001.1 or ANSI/NAAMM MBG 531 depending on your market. Send us your drawings, CAD files, or even a simple sketch with dimensions — we will confirm specifications, prepare shop drawings for approval, and quote your exact bill of materials. Request a quote to get started.
| Construction | Cross bars hydraulically pressed into slotted bearing bars (no welding) |
| Bearing bar size | 20×3 mm to 100×9 mm (depth × thickness), flat bar |
| Bearing bar pitch | 19-space and 15-space series; custom pitches on request |
| Cross bar pitch | Typically 50 mm or 100 mm; custom per drawing |
| Panel size | Made to order; cut, banded, and notched per project drawings |
| Material | Carbon steel (Q235/equivalent), stainless steel 304/316 |
| Surface finish | Hot-dip galvanized (ASTM A123), painted, untreated, or stainless natural |
| Standards | YB/T 4001.1, ANSI/NAAMM MBG 531, ISO 9001, CE |
| Load capacity | Depends on bar size, span, and pitch — engineered load tables on request |
| Accessories | Banding bars, kick plates, stair tread nosings, fixing clips |
- Weld-free pressed joints — no spatter, burn marks, or weld beads
- Flush, uniform top surface suited to visible architectural work
- Bearing bars from 20×3 to 100×9 mm, made to project spec
- Hot-dip galvanized to ASTM A123, stainless 304/316, painted, or mill finish
- Produced to YB/T 4001.1 and ANSI/NAAMM MBG 531 under ISO 9001
- Every panel cut, banded, and notched to your drawings — no stock SKUs
Frequently Asked Questions
Can you manufacture press locked grating from our drawings or CAD files?
Yes — custom fabrication is our standard workflow, not the exception. Send DWG, DXF, or PDF drawings (or a dimensioned sketch) and we will confirm bearing bar size, pitch, panel layout, and cutouts, then issue shop drawings for your approval before production.
Is there a minimum order quantity for press locked grating?
Orders are project-based rather than fixed-MOQ. Container-load orders are most economical for export, but smaller trial quantities and mixed shipments with other grating types are often workable — contact us with your panel schedule and destination port and we will advise.
What load can press locked grating carry?
It depends on bearing bar section, span, and pitch, so we never quote a single generic number. Press locked grating is generally specified for pedestrian and light-to-medium duty. Give us your span and loading case and we will provide engineered load tables per YB/T 4001.1 or ANSI/NAAMM MBG 531.
What is the typical production lead time?
Lead time varies with quantity, bar configuration, and surface treatment — hot-dip galvanizing adds processing time versus mill finish. Most export orders ship within a few weeks of drawing approval; we confirm a firm production schedule with every quotation.