Serrated vs. Plain Surface Bar Grating: Which One Fits Your Application?

Serrated vs. Plain Surface Bar Grating: Which One Fits Your Application?

Surface selection is one of the most consequential decisions you'll make when specifying metal bar grating — and one of the most commonly overlooked. Engineers and facility managers often focus on load capacity and panel size while treating surface type as an afterthought. That's a mistake. The surface profile directly affects worker safety, slip resistance, and long-term maintenance costs.

At Ohio Gratings, we manufacture both serrated and plain surface bar grating in welded and swaged configurations, in carbon steel, stainless steel, and aluminum. Here's how to determine which one your application actually requires.

Plain Surface Bar Grating

Plain surface grating has a smooth top edge on the bearing bars, running perpendicular to foot traffic or wheeled loads. It's the standard choice when traction isn't a primary concern.

Best suited for:

• Indoor platforms and walkways with minimal exposure to moisture, oil, or debris
• Equipment platforms and machine guarding
• Applications where rolling loads (carts, dollies) benefit from a smoother surface
• Projects where cost efficiency takes priority over slip resistance

Plain grating is easier to keep clean, presents lower resistance to wheeled traffic, and costs less to manufacture than its serrated counterpart. But that smooth top edge offers no mechanical bite — a real liability in wet, greasy, or icy conditions.

Serrated Surface Bar Grating

Serrated grating features notched or castellated bearing bars, machined into the top edge to create a slip-resistant surface. This isn't cosmetic — it's a functional modification that meets OSHA's general industry walking-working surface requirements (29 CFR 1910 Subpart D) for slip resistance in hazardous conditions.

Best suited for:

• Outdoor platforms, stairs, and walkways exposed to rain, snow, or ice
• Industrial environments with oil, grease, or chemical spill potential
• Processing plants, refineries, and wastewater facilities
• Any application where foot traffic safety is non-negotiable

The serrations do add a small amount of manufacturing cost and can increase resistance for wheeled equipment. But in any environment where slip-and-fall risk exists, that tradeoff isn't optional — it's a safety requirement.

Making the Call

Ask these questions before you specify:

1. Is the installation indoor or outdoor? Outdoor applications almost always call for serrated surfaces due to weather exposure.
2. What's walking on it? Foot traffic demands slip resistance. Wheeled equipment may perform better on plain surfaces.
3. What's the contamination risk? Oil, grease, water, or chemical exposure pushes the decision toward serrated.
4. What do your compliance requirements demand? OSHA, ADA, and site-specific safety programs may dictate surface type regardless of preference.

When in doubt, serrated surface grating is the safer default for any application involving personnel access in variable conditions.

Manufactured to Spec, Not Guesswork

Ohio Gratings has produced welded, swaged, press-lock, and riveted bar grating in Canton, Ohio since 1952. Every panel — plain or serrated — is manufactured to meet the load, safety, and code requirements your project demands, whether you're specifying for industrial platforms, infrastructure decking, or commercial applications.

Need help specifying the right surface for your next project? Contact our engineering team for load calculations, material recommendations, and code compliance guidance.