Press-Locked Steel Grating Production
The crossbars of the press lock steel grating are typically made of carbon flat steel, stainless steel, or brass plates, which are pressed into the supporting flat steel with a powerful force of 200 tons. The nodes between the flat steel bars are automatically locked by the extrusion force generated during deformation. The crossbars of the press-locked steel grating usually consist of flat steel. Due to its structure being inserted vertically in two directions, the steel grating provides better lateral (width-wise) load-bearing capacity and effectively prevents tilting and instability issues caused by large-sized supporting flat steel. Press-locked steel grating is particularly suitable for use as a heavy-duty load-bearing grating. It combines the strength, corrosion resistance, and low-maintenance characteristics of welded steel grating with uniform spacing, a lightweight structure, and an attractive appearance.
The press lock steel grating is manufactured through processes such as slotting (punching), insertion, welding, and finishing using flat steel of specific dimensions, including low-carbon flat steel, stainless steel, brass, and aluminum plates. The product has firm welds, uniform hole spacing, and an attractive design, making it convenient and practical. Press-locked grating combines the strength, corrosion resistance, and low-maintenance characteristics of ordinary steel grating with uniform spacing, a lightweight structure, and an attractive appearance. It serves both as a functional product and an art piece and has gained widespread applications.
Four Types of Press-Locked Steel Grating
- Press-Locked Steel Grating: The supporting flat steel is slotted, and the crossbars are pressed and locked into shape. Typically, the maximum processing height for producing regular steel gratings is 100 mm. The length of the steel grating is usually less than 2000 mm.
- Heavy-duty press lock grating: It is a type of steel grating product in which high flat steel and crossbars are interlocked and tightly pressed under a pressure of 1200 tons. It is suitable for applications with high span and heavy loads.
- Integral inserted steel grating: The supporting flat steel and crossbars of integral inserted steel grating have the same height, with a slot depth equal to half the depth of the supporting flat steel. The height of the steel grating does not exceed 100 mm, and its length is typically less than 2000 mm.
- Sunshade-inserted steel grating: The supporting flat steel of sunshade-inserted steel grating has slanted slots at 30° or 45°, and the crossbars are slotted and locked into shape. Grid panels with various spacing and specifications can be produced using materials such as carbon steel, stainless steel, and aluminum. The height of the grating is less than 100 mm.
Pressure-locked steel gratings are widely used in civil and commercial construction, theaters, subways, light rail, and other municipal engineering projects. They can be used for suspended ceilings, interior and exterior decoration, platform walkways, ventilation windows, well covers, signage, and various covers, among other applications.
Characteristics of Press-Locked Steel Gratings
| Type | Items |
|---|---|
| Type A saddle clip | – Top board with double hooks |
| – Holding down plate with teeth | |
| – M8 inner-hexagon bolt | |
| Type B saddle clip | – Top board with double hooks (one of the hooks can draw together the two neighboring steel gratings) |
| – Holding down plate with teeth | |
| – M8 inner-hexagon bolt | |
| Type C saddle clip | – Top board with double hooks |
| – M8 hexagon bolt that can be welded in the supporting structure |
| Dimension | kg/m² | Specification | kg/m² |
|---|---|---|---|
| AGL255/30/100 | 45.8 | AGL255/30/50 | 54.1 |
| AGL32530/100 | 56.2 | AGL325/30/50 | 64.6 |
| AGL355/30/100 | 60.7 | AGL355/30/50 | 69.1 |
| AGL405/30/100 | 68.2 | AGL405/30/50 | 76.6 |
| AGL455/30/100 | 75.7 | AGL455/30/50 | 84.0 |
| AGL505/30/100 | 83.2 | AGL505/30/50 | 91.5 |
| AGL555/30/100 | 90.7 | AGL555/30/50 | 99.0 |
| AGL60530/100 | 98.3 | AGL605/30/50 | 106.5 |
| AGL655/30/100 | 105.7 | AGL655/30/50 | 114.0 |
- Excellent Lateral Load Transmission: Under the same load conditions, press-locked steel gratings require less material compared to other types of gratings.
- Clean and Smooth Surface: The interlocking structure of the flat bars in pressure-locked gratings results in a clean and smooth surface appearance.
- Various Spacing Options: Pressure-locked steel gratings offer a wide range of spacing options for both the flat bars and crossbars, allowing customization to meet different user requirements.
- Comparable Load-Bearing Capacity: Pressure-locked steel gratings have the same load-bearing capacity, lifespan, and grid structure as welded gratings.
Serrated Bar Grating Galvanizing
| # | Bearing Bar | US Standard | Bearing Bar Pitch (mm) | US Standard | Cross Bar | Cross Bar Pitch (mm) | Flat Bar Type | Materials | Galvanizing Standard |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 20×5, 25×3, 25×4, 25×5, 30×3, 30×4, 30×5, 32×3, 32×5, 40×5, 50-75x8mm, etc. | 1”x3/16”, 1 1/4”x3/16”, 1 1/2”x3/16”, 1”x1/4”, 1 1/4”x1/4”, 1 1/2”x1/4”, 1”x1/8”, 1 1/4”x1/8”, 1 1/2”x1/8”, etc. | 25, 30, 30.16, 32.5, 34.3, 40, 50, 60, 62, 65, etc. | 19-w-4, 15-w-4, 11-w-4, 19-w-2, 15-w-2, etc. | 5×5, 6×6, 8x8mm (twisted bar or round bar) | 40, 50, 60, 65, 76, 100, 101.6, 120, 130mm or according to customer requirements | Plain, Serrated (tooth-like), I bar (I section) | Low carbon steel (Q275/Q235/Q195, ASTM A36, A1011, A569, S275JR, SS304, SS400, UK: 43A), Stainless steel, aluminum alloy, etc. | CN: GB/T13912, US: ASTM (A123), UK: BS729 |
Specifications and Weights of Press-Locked Steel Gratings
Common specifications and weights of press-locked steel gratings vary depending on the specific requirements and standards. However, I can provide you with some general information on commonly used specifications and their corresponding weights for reference:
| Dimension | kg/m² | Specification | kg/m² |
|---|---|---|---|
| AGL255/30/100 | 45.8 | AGL255/30/50 | 54.1 |
| AGL32530/100 | 56.2 | AGL325/30/50 | 64.6 |
| AGL355/30/100 | 60.7 | AGL355/30/50 | 69.1 |
| AGL405/30/100 | 68.2 | AGL405/30/50 | 76.6 |
| AGL455/30/100 | 75.7 | AGL455/30/50 | 84.0 |
| AGL505/30/100 | 83.2 | AGL505/30/50 | 91.5 |
| AGL555/30/100 | 90.7 | AGL555/30/50 | 99.0 |
| AGL60530/100 | 98.3 | AGL605/30/50 | 106.5 |
| AGL655/30/100 | 105.7 | AGL655/30/50 | 114.0 |
| Flat Bar Size | |
|---|---|
| Width | Typically ranges from 20 mm to 100 mm. |
| Thickness | Typically ranges from 3 mm to 10 mm. |
| Cross Bar Size | |
| Width | Typically ranges from 5 mm to 10 mm. |
| Thickness | Typically matches the flat bar thickness. |
| Bearing Bar Pitch | |
| The distance between adjacent flat bars, measured center-to-center. | Common pitches include 30 mm, 33 mm, 34 mm, 40 mm, 50 mm, and 60 mm. |
| Cross Bar Pitch | |
| The distance between adjacent cross bars, measured center-to-center. | Common pitches include 50 mm, 100 mm, and 200 mm. |
| Weight Calculation | |
| The weight of a press-locked steel grating can be estimated by multiplying the area (in square meters) by the unit weight (in kilograms per square meter). The unit weight can be calculated based on the specifications of the flat bars and cross bars. | |
