Steel grating is not a one‑size‑fits‑all product. Different job sites, load requirements, and environmental conditions call for different types of grating. This guide will help you quickly understand the main categories so you can choose the right one for your project.
I. By Manufacturing Process
This is the most fundamental way to classify grating, as it determines mechanical performance and appearance.
| Type | How it’s made | Key strength | Typical use |
|---|---|---|---|
| Welded steel grating | High‑pressure resistance welding – bearing bars and cross bars fuse together | High strength, low cost, fast production, globally accepted | Industrial platforms, walkways, stair treads, trench covers |
| Press‑locked steel grating | Cross bars pressed into slots cut into bearing bars, hydraulically locked – no welds | Smooth surface, no risk of weld corrosion, about 20% higher load capacity | Stainless steel grating, architectural finishes, food factories, clean rooms |
| Swaged / snap‑lock grating | Cross bars pass through pre‑punched holes in bearing bars and are fixed at the ends | Removable, very high open area, lightweight | Grating ceilings, sunshade structures, light‑duty walkways |
Note: Press‑locking is especially good for stainless steel because it avoids the heat‑affected zone and intergranular corrosion that can happen with welding.
II. By Surface Pattern
Depending on anti‑slip needs and appearance, grating comes in these forms:
1. Plain / flat surface
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No extra processing on top of the bearing bars.
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Good for: Easy to clean, comfortable to walk on. Works for dry areas or where slip resistance isn’t critical.
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Typical use: Indoor operating platforms, equipment access ways, building facades.
2. Serrated / anti‑slip
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Teeth or dimples are pressed into the top surface of the bearing bars.
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Good for: Dynamic friction coefficient is roughly 50–80% higher than plain grating – much lower risk of slipping in wet or oily conditions.
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Typical use: Ramps, car washes, drilling platforms, offshore facilities, slaughterhouses, grease handling areas.
3. I‑bar / heavy‑duty
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Bearing bars have an “I” shaped cross‑section or reinforcing ribs.
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Good for: Much higher moment of inertia for the same weight – load capacity goes up dramatically. Designed for extra‑long spans or extreme loads.
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Typical use: Port machinery, heavy truck access platforms, mine feeder walkways.
III. By Application
In practice, grating is often made in specific configurations for specific jobs:
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Platform grating: Standard rectangular panels with banding on all four edges. Used to build operating platforms or access ways. Common span ≤1.5m, bearing bar spacing 30–40mm.
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Stair treads: Front edge has an anti‑slip nosing (often painted yellow or with a thicker edge). Width is usually 200–300mm. Can be clipped directly to stair stringers.
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Trench cover / drain cover: Compact size, usually a single removable cover resting on a frame or directly on the trench walls. Often uses heavy bearing bars (e.g. 50×5mm) to handle wheel loads.
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Tree grate: Two or four pieces that come together around a tree trunk. Often made of 304 stainless steel with a brushed or mirror finish.
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Floor plate / perforated grating: A steel plate with punched holes (like fish‑scale or round holes) on top of the grating structure. Gives you drainage plus a solid surface that stops small tools or parts from falling through.
IV. By Material (brief)
Even though material isn’t exactly a “type”, it’s often the first thing you decide:
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Carbon steel grating: Best price/performance ratio. Must be hot‑dip galvanized or coated against rust. Works for 90% of normal industrial jobs.
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Stainless steel grating: Grade 304 for food and municipal use, 316L for marine and chemical environments. No coating needed – naturally corrosion resistant, but costs about 2–3 times more than carbon steel.
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Aluminum grating: One‑third the weight of steel, won’t rust, but lower strength. Good for light platforms, stairs, decorative walkways.
V. Quick way to figure out what type you need
Ask yourself three questions:
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Is the environment wet or corrosive?
→ Yes: hot‑dip galvanized carbon steel or 316L stainless steel.
→ No: plain carbon steel (indoors) or cold galvanized is fine. -
Do you need extra anti‑slip?
→ Yes: serrated grating.
→ No: plain surface works. -
Any special appearance or hygiene requirements?
→ Yes: go with press‑locked stainless steel – no weld points, easy to clean.
→ No: welded grating is the most economical choice.
Our recommendation: For the vast majority of industrial platforms and walkways, welded + hot‑dip galvanized + plain (or serrated) is the most proven and reliable combination. For stainless steel projects or architectural uses, press‑locked is often a better fit.
If you’re not sure which type is right for you, just send us your span, load, and environment description. We’ll recommend the best grating type for free.