Steel grating is also known as steel grating, grille plate, steel mesh plate, and steel grid;
Steel grating series products: galvanized steel grating, toothed steel grating, butt steel grating, platform steel grating, dense steel grating, butt steel grating, trench cover, water grate, ball joint Type guardrails, platform steel gratings, pressure-welded steel gratings, pressure-locked steel gratings, pressure-welded steel gratings, etc.
Types of steel gratings: ordinary steel gratings, narrow steel gratings, diamond-shaped gratings, rice-shaped gratings, rod gratings, I-shaped gratings, heavy-duty gratings, intensive gratings Grating, riveted grating, riveted trapezoidal steel grating, riveted diamond steel grating;
Steel gratings are classified by industry use: bridge pier steel gratings, oil field steel gratings, ship steel gratings, wharf steel gratings, power plant steel gratings, platform steel gratings, desulfurization tower steel gratings, sewage plant steel gratings , parking lot steel grating, maintenance platform steel grating, car wash room fiberglass grating.
Steel gratings are classified by name: trench cover plate, steel grating, grating plate, steel grating plate, stair tread plate, platform steel grating plate, heavy-duty steel grating plate, plug-in steel grating plate, toothed steel Grating, composite steel grating, spherical column railings, anti-slip steel grating, hot-dip galvanized steel grating, stainless steel grating, fiberglass grating, pollution barrier grating, stainless steel grating, pigeonhouse floor net.
Steel grating model and marking:
1.Steel grating structural form:
W--pressure welded steel grating;
L--pressure lock steel grating;
2. Center distance of load-bearing flat steel, in millimeters (mm);
3. The distance between the centers of the crossbars, in millimeters (mm);
4. Bearing flat steel shape markings:
F--flat steel;
I--I type flat steel;
S--toothed flat steel;
5. Surface treatment status mark:
G--Hot-dip galvanizing;
P--paint;
U--no surface treatment;
Steel grating production standards: YBT 4001.1-2007, GB/T4001.1-2007, YB∕T 4001.2-2020, YB∕T 4001.3-2020, YBT 4001-1998, HG/T 21612-1996;
Steel grating is a kind of steel product with a square grid in the middle that is welded by a pressure welding machine or manually using flat steel arranged crosswise with crossbars at certain intervals. Steel grating is mainly used to make ditch covers. , Steel structure platform plates, steel ladder treads, etc. The crossbar is generally made of twisted square steel.
Series classification of steel gratings for different uses:
Series 1 (30mm spacing) steel grating is the most commonly used type and is used in various industrial fields. The center distance of the loaded flat steel of this series of steel gratings is 30mm, which complies with American standards. Among the entire steel grating series , has the strongest resistance to surface impact. It is widely used in platforms, walkways and drain covers, stair steps, etc. in power plants, refineries, sewage treatment plants, granaries, chemical plants, highways, airports and docks. Among them, the toothed steel grating can be used in wet and slippery places, especially suitable for offshore oil production platforms.
Series 2 (40mm spacing) steel grating is the most economical and lightweight type, complying with the specifications of fixed platforms, walkways and stairs stipulated in British standards. This is the most ideal product in situations with small spans, even in transport equipment walkways. It is no exception under such a load, and can also be used as warehouse shelves, pavilion panels, trestles, protective fences, sun curtains, etc.
Series 3 (60mm spacing) steel grating is a variety specially developed for applications in the mining industry. It solves the problem of mineral splashing on the plate. This series of steel gratings has a nominal size of 50*60mm, which allows most splash materials to pass through, thus ensuring the cleanness and safety of the plate. This product is often designated for use in the plate of the crushing system. , walkways on conveyor lines and ball mills, processing plants and operation stations, etc. As a new engineering material, steel grating is mainly used as platforms, trestles, bridges, highway guardrails, trench covers, fences, gates and other facilities in the fields of metallurgy, energy, shipbuilding, municipal administration, petrochemicals, transportation, building materials, national defense and other fields. At present, my country's annual demand for steel grating is about 270,000 tons. Therefore, the market prospect of steel grating is very broad.
Steel grating is an open steel component that is orthogonally combined with load-bearing flat steel and cross bars at a certain distance and fixed by welding or pressure locking; the cross bars generally use twisted square steel or round steel. Or flat steel, the material is divided into carbon steel and stainless steel. Steel grating is mainly used to make steel structure platform plates, trench cover plates, steel ladder treads, building ceilings, etc. According to different production methods, it is mainly divided into pressure-welded steel grating and pressure-locked steel grating.
1). Bearing bar: a flat steel bearing the main load.
2). Cross bar: twisted square steel, round steel or flat steel fixed on the load-bearing flat steel.
3). Bearing bar center spacing: the distance between the centers of two adjacent load-bearing flat bars.
4). Length of steel grating: The larger size of the steel grating parallel to the direction of the load-bearing flat steel is called the length (L) of the steel grating.
5). Width of steel grating: The larger size of the steel grating perpendicular to the direction of the load-bearing flat steel is called the width of the steel grating (W).
Product structure: Pressure-welded steel grating. The steel grating fixed by pressure resistance welding at each intersection of the load-bearing flat steel and the cross bar is called pressure-welded steel grating.
Steel gratings can be processed into various sizes and shapes according to user needs.
The spacing between the load-bearing flat steel bars and the spacing between the cross bars can be determined by the supplier and purchaser based on the design requirements.
At the end of the load-bearing flat steel, flat steel of the same specification as the load-bearing flat steel is generally used for edging. Section steel or skirting boards can also be used for edging. However, the cross-sectional area of the edging plate should not be smaller than the cross-sectional area of the load-bearing flat steel.
According to the request of the buyer, the goods can be delivered without wrapping.
The welding height shall be single-sided fillet welding with a welding height not less than the thickness of the load-bearing flat steel, and the weld length shall not be less than 4 times the thickness of the load-bearing flat steel.
If the cuts or openings in the steel grating exceed 180mm, they should be edged.
The specifications and models of steel gratings are formed into various specifications based on the specifications of the load-bearing flat steel, the combined spacing between the load-bearing flat steel and the cross bars, the structural type of the steel grating, the shape of the load-bearing flat steel, and the surface treatment state. The model is expressed as follows:
DG255/30/100 means: the center distance of the cross bars is 100mm; the center distance of the flat steel is 30mm; the thickness of the flat steel is 5mm; the width of the flat steel is 25mm. In addition, the letter "S" can be added after the specification to represent the toothed steel grating, or the letter "I" can represent the I-shaped steel grating, or both can be used to represent the I-shaped steel grating. like
DG325/30/50I means: I-shaped flat steel with a center spacing of 50mm between crossbars, a center spacing of flat steels of 30mm, and a flat steel width of 32mm.
Commonly used flat steels include 255, 303, 305, 404, 405, and 505. When choosing to make step boards, the most common step board specifications are 255/30/100. Commonly used specifications are 20*5, 25*5, 25*3, 32*5, 30*5, 40*5, 40*3, 50*5, 65*5, 75*6, 100*8, 100*10 wait.
Steel grating classification
1. Stainless steel type
Stainless steel gratings are widely used in various factories and engineering projects at home and abroad. Stainless steel gratings can be divided into flat type, toothed type, and I type, with more than 200 specifications and varieties (different protective treatments can be carried out on the surface according to different use environments).
Production method
Machine pressure welding uses a high-voltage resistance pressure welding machine. The robot automatically places the crossbar horizontally on the evenly arranged flat steel. The crossbar is pressure-welded into the flat steel through powerful welding power and hydraulic force, so that the solder joints can be strong. High-quality steel grating with extremely high stability and strength. Stainless steel grating has the characteristics of light weight, high strength, large load-bearing capacity, material saving and economy, ventilation and light transmission, modern style, beautiful appearance, anti-skid and safe, easy to clean, easy to install, and durable.
Features
1) Light weight, high strength, large carrying capacity, material saving and economy, ventilation and light transmission, modern style and beautiful appearance.
2) Anti-skid, safe, easy to clean, easy to install, and durable.
2. Platform type
Platform steel grating is a widely used steel grating product. This kind of steel grating is widely used in various industrial fields and has the strongest resistance to surface impact, especially steel gratings with a crossbar spacing of 50mm. The board is highly resistant to lateral impacts. Platform steel grating is suitable for alloy, building materials, power stations, boilers, shipbuilding, petrochemical, chemical and general factory buildings, municipal construction and other industries. It has ventilation, light transmission, anti-skid, strong bearing capacity, beautiful and durable, easy to clean and install, and is a A new and updated building product. You can add welding kick plates (sidewalls), pattern plate guards, and install connectors and other accessories around the perimeter. Flat steel with different specifications from the load-bearing flat steel can be used for edging, or angle steel, channel steel, square tube, etc. can be used for edging; handles and hinges can also be installed on steel gratings that need to be moved or opened frequently.
Features of the platform steel grating: You can add welding kick plates (sidewalls), pattern plate guards, and install connectors and other accessories around the perimeter; use flat steel with different specifications from the load-bearing flat steel for edging, or use angle steel, channel steel, Hemming of square tubes, etc.; handles and hinges can be installed on platform steel gratings that need to be frequently moved or opened. Platform steel grating is also a type of steel grating. It is mainly used as a walkway plate in the working platform corridor. It is generally used for high-altitude operations. It is an orthogonal combination of load-bearing flat steel and cross bars at a certain distance, and is welded Or open plate steel components fixed by pressure locking. Since the platform steel grating is used for high-altitude operations, it only needs to meet the manned requirements. Generally, the span is within 1000, and people commonly use 253/30/100 or 303/30/100; if the span is within 1000-1500 We use 323/30/100.
3. Gutter cover
Steel grating ditch covers are designed and manufactured with steel gratings, which are widely used in various industrial and civil buildings such as urban roads, squares, gardens, docks, airports, parking lots, highways, railways, and industrial projects.
Features:
Beautiful appearance: simple lines. Silver appearance, modern trend.
Best drainage: The leakage area reaches 83.3%, which is more than twice that of cast iron.
Hot-dip galvanizing: strong rust resistance, maintenance-free and replacement-free.
Anti-theft design: The cover and frame are hinged, anti-theft, safe and easy to open.
Save investment: big leap. When heavy-duty, it is cheaper than cast iron and saves the cost of replacement if it is stolen or crushed.
High strength: The strength and toughness are much higher than cast iron, and it can be used in long-span and heavy-load environments such as docks and airports.
Multiple specifications: to meet different environments and loads. Span, size and shape required.
Product application pictures: All types of steel grating panels are manufactured according to YB/4001-2007 standards.
The products are used in industrial platforms, overpasses, stair treads, inner covers, etc.
4. Composite type
Composite steel grating is a product that is composed of a steel grating with a certain span capacity and a pattern plate with a sealing surface. It can be composed of any type of steel grating and industrial patterned steel plates of different thicknesses. The most commonly used steel grating is G323/40/100 as a low plate; patterned steel plates are commonly used as 3mm thick plates, but 4mm, 5mm or 6mm plates can also be used.
How to fix steel grating
Two methods of welding and mounting clamp fastening are available. The advantage of welding is that it is permanently fixed and will not loosen. The specific location is on the first flat steel in each corner of the steel grating. The weld length is not less than 20mm and the height is not less than 3mm. The advantages of mounting clips are that they destroy the hot-dip zinc layer and are easy to disassemble. Each panel requires at least 4 sets of mounting clips. The number of mounting clips increases as the length of the panel increases. The safest method is to weld the screw heads directly to the beam without clamping to ensure that the steel grating will not slip off the beam due to loose mounting clamps.
5. Plug-in type
Plug-in steel grating, also called compressed steel grating, is made of plain carbon flat steel, stainless steel, brass plates, and aluminum plates of a certain size through processes such as slotting (holes), plugging, welding, and finishing. It has many advantages such as lightness, high strength, anti-corrosion, maintenance-free and beautiful appearance.
6. Glass type
Fiberglass grating has excellent properties such as light weight, high strength, toughness, stability, anti-skid, corrosion resistance, flame retardant, insulation, low thermal conductivity, no sparks, etc. It is widely used in petrochemical industry, electric power, marine engineering, electroplating, ships, water And working platforms, stair steps, ditch covers, bridge walkways, filter plates, packing brackets, etc. in wastewater treatment, papermaking, brewing, pharmaceutical and other industries are ideal load-bearing components in corrosive environments.
7. Ceiling type
Steel grating ceiling is an indoor ceiling product designed and manufactured using steel grating. It has a steel grating structure that is lightweight, beautiful, high-strength and can be used by people.
It has special features and is easy to install. The surface of the steel grating is hot-dip galvanized, which makes it anti-corrosion and durable for 30 years and requires no paint maintenance. Steel grating ceiling is a decorative steel grating product with a certain load-bearing capacity. It is made of ordinary Q235 low-carbon flat steel, stainless steel, brass plate, and aluminum plate of a certain size through slotting (holes), plugging, welding, Made by finishing and other processes. This product has strong solder joints, uniform hole spacing, smooth mesh surface, beautiful design, and practicality. It is both a user product and a work of art. Steel grating ceilings are widely used in the ceilings of industrial and civil buildings such as tobacco manufacturing, industrial plants, large stadiums, convention and exhibition centers, large businesses, stations, docks, airports, etc.
Steel grating ceiling product features:
1). The high strength, light structure, and solid grid pressure-welded structure of the steel grating ceiling make it have the characteristics of high load-bearing, light structure, and easy lifting, unloading, and installation.
2). Steel grating is used as a suspended ceiling, with beautiful appearance and durability: hot-dip galvanizing surface treatment makes it have very good anti-corrosion ability and beautiful surface gloss.
3). This product has good ventilation, lighting, heat dissipation, explosion-proof and anti-slip properties.
4). When used as a suspended ceiling, it is easy to clean and maintain. Long service life.
Since 2010, plug-in steel grating has been widely used in civil and commercial buildings, theaters, subways, urban railways and other municipal engineering fields. The products have many features such as lightness, high strength, anti-corrosion, maintenance-free, and beautiful appearance. They are now widely used in civil and commercial applications. Construction, theater, subway, urban railway and other municipal engineering fields
The installation and fixing methods of steel grating ceiling are as follows:
There are two methods for fixing steel grating: welding and installation. If it is permanent and does not need to be disassembled, welding can be used to weld it on the support. For the specific location, on the first flat steel at each corner of the plate, weld a fillet weld with a length of not less than 20 mm and a height of not less than 3 mm. .The use of installation clamps has the advantages of not damaging the zinc layer and being easy to disassemble. It can be fixed with installation clamps. Each plate should use at least four installation clamps. For larger plates, it is best to install several more on available supports. .
See the table for specific selections:
Type A: consists of an upper pressure plate with double hooks, a lower pressure plate with teeth and an M8 hexagon socket bolt.
Type B: It consists of an upper pressure plate with double hooks (one of the hooks can hold two adjacent steel gratings together), a lower pressure plate with teeth and an >M8 internal angle bolt.
Type C: consists of an upper pressure plate with double hooks and an M8 hexagonal head bolt that can be welded to the supporting member.
8. Plug-in type
Plug-in steel grating plates (also known as pressure-locked steel grating plates) are made of plain carbon flat steel, stainless steel, brass plates, and aluminum plates of a certain size through slots (holes), plug-in pressure
Made by locking, welding, finishing and other processes. Opposite steel gratings embody the characteristics of high strength, anti-corrosion, and maintenance-free of pressure-welded steel gratings. They also have the characteristics of uniform and precise combination, light and beautiful structure, natural harmony, and elegant style. It is widely used in civil and commercial buildings, theaters, subways, urban railways and other municipal engineering fields. It can be used in suspended ceilings, indoor and outdoor decoration, platform walkways, ventilation windows (wells), advertising plaques, various covers, etc. The types of steel grating panels can be divided into four types:
1). After grooving the ordinary load-bearing flat steel, the horizontal bar flat steel is press-locked and formed. The maximum processing height for producing ordinary steel gratings is 100mm. The length of steel grating is usually less than 2000mm.
2). The integral load-bearing flat steel and the cross-bar flat steel have the same height. The groove depth is 1/2 of the load-bearing flat steel. The height of the steel grating shall not be greater than 100mm. The length of steel grating is usually less than 2000mm.
3). The sunshade-type load-bearing flat steel has a 30° or 45° inclined groove, and the groove rod flat steel is slotted and pressed into shape. Grating plates with other spacing and specifications can be delivered according to different needs, and ordinary carbon steel, stainless steel, aluminum and other materials can be used. The height of the grille plate is less than 100mm.
4). The heavy-duty grating plate is formed by the high flat steel and the horizontal bar flat steel interlocking with each other and pressed under the pressure of 1200 tons. Suitable for high-span load-bearing situations.
9. Pattern board
Pattern steel plate weight
The steel grating is the heaviest, and its deflection under loads of 2kN/m2 and 4kN/m2 is twice that of the steel grating. In actual use, the tread feel of the patterned steel plate is very poor. And there is water and dust accumulation in the depressions. Steel gratings can also increase many safe use loads after the load exceeds 4kN/m2, while the deflection of patterned steel plates has reached 8.4mm when the load exceeds 4kN/m2. From the use conditions, steel gratings have greater advantages than patterned steel plates.
Steel grating uses: used in industrial buildings, public facilities, device frames, platforms, floors, walkways, stair treads, ditch covers, fences, suspended ceilings, etc. in petroleum, chemical, metallurgy, light industry, shipbuilding, energy, municipal and other industries
Steel grating is suitable for alloys, building materials, power stations, boilers, and shipbuilding.
It is used in petrochemical and chemical industries, general industrial plants, municipal construction and other industries. It has the advantages of ventilation and light transmission, anti-slip, strong bearing capacity, beautiful and durable, easy to clean and simple to install.
Steel grating has been widely used in various industries at home and abroad. It is mainly used as industrial platforms, ladder treads, handrails, passage floors, railway bridge sideways, high-altitude tower platforms, drainage ditch covers, manhole covers, road barriers, three-dimensional Fences in parking lots, offices, schools, factories, enterprises, sports fields, garden villas, and can also be used as exterior windows of residential houses, balcony guardrails, highway, railway guardrails, etc.