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Press-welded Gratings
Basic information
Steel bar grating is the workhorse of the industrial flooring market and has served the industry for decades. With exceptional strength-to-weight ratio, steel bar grating offers durable solutions for nearly all construction applications. With over 70% open area, our grating ensures virtually maintenance-free operation while being 100% recyclable.
VALLEGE Gratings supplies customizable steel bar grating solutions for diverse applications including but not limited to: trench covers, stair treads, and multi-level flooring systems.
VALLEGE Gratings can supply a wide range of steel bar grating products that can be used for a variety of applications. Steel bar grating is an ideal choice for projects ranging from trench covers and stair treads to decking and steel flooring. Meeting ISO 14122 & OSHA standards, our gratings safely cover floor openings while allowing optimal passage of light, air, and fluids.
As China's leading specialty steel bar grating manufacturer, VALLEGE Gratings engineers solutions for both floor grating and specialized architectural needs. Steel bar grating is available in materials such as various types of steel grating. VALLEGE Gratings carries a full steel bar grating product line to meet the needs of the customers.
Sign of steel bar grating
1. Bearing bar pitches may be 20, 22, 30, 32.5, 34.3, 40, 60mm, of which 30mm and 40mm are recommended.
2. Cross bar pitch may be 38, 50, 60 to 100mm, of which 50mm and 100mm are recommended.
3. Sign of the shape of bearing bars:
F: Plain style (may be omitted in the symbol of steel grating);
S: Serrated style;
I: I-shape style
4. Sign of surface treatment. G-Hot Dip Galvanized (may be omitted in the symbol of steel grating); P - Painted; U – untreated
5. Type of grating:
W: Press-welded
L: press-locked
Common Steel Bar Grating Applications
• Industrial platform
• Bridge Flooring
• Trench Covers
• Walkways
• Ramps
• Platforms
• Catwalks
Manufactured Standard
CHN：YT/B 4001.1-2019
UK： BS 4592-1:2006
USA：ANSI / NAAMM (MBG531-00)
AUS: AS1657-2018
Carbon Steel Standard
CHN：GB700
UK： BS 4460
USA：ASTM / A36
AUS: AS3679
Others
• Materials: Carbon steel,stainless steel 304 or 316.
• Top surface: Flat surface or Serrated
• Cut face of Bearing Bar: rectangle and ‘I’ type
Finishes
Steel bar grating is a functional product that has been in the market for nearly a century, serving various industrial functions such as industrial flooring, catwalks, and antiskid flooring in humid plants, among many other uses. Its contemporary look is now attracting architects to use it as an architectural alternative for fences, facades, louvers, and other ornamental elements that complement residential or urban projects.
Due to its diverse applications, architects and engineers require new and better finishes to ensure the grating's longevity in specific environments and project conditions.
Most common steel bar grating finishes are:
Mill Finish
The panel or custom fabricated grating is delivered in its natural finish, with no protection. This finish is used when a project requires a natural steel color look, considering that it will become corroded within a few days (developing oxidation).
Black Paint Finish
It involves immersing the grating into a black paint kettle and adding a thick layer of special black paint (bituminous paint). This layer protects steel from corrosion for a long period. While this finish is not the most protective, it still ensures the piece does not corrode in the short term.
Powder Coating
This finishing process involves spraying electrostatically charged, atomized paint particles onto steel, creating an exceptionally durable and efficient coating. Powder coating offers a superior finish compared to other options on the market. It is available in a wide variety of colors, making it popular with architects for color-matching in their projects.
It is recommended to hot-dip galvanize steel components before powder coating. This two-stage process significantly extends the lifespan of the treated steel, typically adding 5 to 10 years of service.
Hot Dip Galvanizing (HDG)
Hot Dip Galvanizing (HDG) offers the best corrosion protection available in the market. This finishing process is performed in accordance with ASTM A123 specifications. It is used for all types of projects due to its exceptional resistance to extreme conditions. Besides extending the product's life up to 60 years, it provides a modern grey finish that conveys elegance.
Hot Dip Galvanizing Standard:
CHN: GB/T 13912
USA: ASTM / A123
UK: BS729
AUS: AS1650
Passivated or Electro-polished ( Stainless Steel only )
Based on this brief explanation of possible steel bar grating finishes, you can now confidently suggest the best alternative to your project manager to ensure both durability and aesthetic appeal for the project.
If you still have any questions, please don't hesitate to contact us.
Fasteners
All grating must be firmly secured in place
This is typically done by welding or using bolted mechanical fasteners.
There are many fixing methods for steel bar grating. Welding, saddle clips and welding lugs fixing are most frequently used.
Welded Installation
Welding provides a superior, permanent installation, while mechanical fasteners are suitable when removability is required or welding is impractical.
The minimum weld pattern shown (right) also indicates the required welding clearance for pedestrian applications.
For permanent installations, welding is mandatory. The fillet weld length must be ≥20mm, with a weld height ≥3mm.
Vehicular applications typically require additional welding; the size and spacing are determined by the specifying authority.
Saddle clip
Bent clips bridging two bearing bars are available in galvanized steel or stainless steel. Standard bolt holes are 10mm in diameter. Bolts, screws, or other connecting hardware shall be supplied by others.
Weld Lugs
Lugs, punched with holes and welded between the bearing bars, connect bolts to the supporting structure.
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Contact Us
Yantai Wanjie New Material Co., Ltd.
Add：No.161 Dongze Road, Fushan District, Yantai, Shandong, China
Phone：+86-19106451331
WhatsApp：+86-13905350690
WeChat：+86 13905350690