Let me pull back the curtain for you—when someone reaches out to our team as a steel structure staircase supplier, I used to start every sales conversation with a question no one expects: “Did you spend five minutes thinking about the tread under your feet before you signed that blue line on the staircase quote?” Nine times out of ten, the answer is no. Most folks fixate on stringer design, load capacity, or how the staircase looks when it meets the landing—big, flashy stuff that shows off to guests. But the tread? That’s the part you touch, every single time you walk up or down, in rain, mud, snow, or bare feet. Get the wrong one, and that sleek steel staircase you built becomes a hazard. Get the right one, and it doesn’t just look good—it lasts 50 years, no slip, no replacement, no headaches. Steel Structure Staircase
I learned this lesson the hard way, three winters ago. We finished a steel staircase for a coffee roaster in Brooklyn—exposed, out front, leading from the sidewalk to their loading dock. The owner picked a smooth steel tread with a tiny anti-slip coating, because it was cheap and looked clean in the photos. By mid-January, we got a panic call: three part-timers had slipped on the way in, two fell and sprained ankles, and the city building inspector was threatening to red-tag the whole thing. We ended up ripping all 12 treads off and installing a perforated steel tread with heavy-duty grit strips. That job cost us double the original quote, ate into our profit, and taught me more about tread design than any engineering manual ever could.
Today, when customers come to us asking about their steel staircase, I walk them through this process step by step—no guesswork, no overcomplicating, just practical stuff tied to how their space actually gets used. Let’s break it down like I’d break it down for you, not some engineering lecture.
First, start with the environment. Where is this staircase going? Indoors, outdoors, in a garage where oil drips, on a porch where snow piles up, or a rooftop where it’s exposed to 100-degree summer sun and freezing winter ice? That’s the first question, because environment dictates every other choice. If you’re putting a staircase in a dry, climate-controlled office building, you can get away with a simpler tread. If it’s outside, in a place that gets rain for half the year or ice for three months, you need something that can shed water, resist corrosion, and not turn into an ice rink when the temperature drops.
We’ve worked on a handful of projects in places like Minnesota, where winter brings 6 inches of snow and black ice by February. For those, we don’t just use grit strips—we use serrated steel treads, with deep, open grooves that push snow and slush right off when someone steps on it. Perforated steel treads, the ones with small holes punched all over, work great here too—water and small debris fall through instead of pooling on top, which is a huge win. The mistake that Brooklyn coffee roaster made was using a solid steel tread. Solid tread holds water, even if it has a coating. When that water freezes, it’s a smooth, clear layer that’s impossible to see until your foot hits it.
Next, load. How many people are going to use this staircase, all at once? Is it a residential staircase for a family of four, or a commercial staircase that gets 50 people going up and down every hour during peak hours? Even industrial staircases, like the ones leading to warehouse mezzanines, have load requirements. But load doesn’t just mean weight capacity—it means foot traffic pattern. If it’s a busy commercial staircase, you need a tread that’s durable enough to stand up to hundreds of steps a day. Smooth industrial steel treads with light anti-slip coatings will wear down in two years, leaving them as slippery as if you’d never put anything on them. We recommend either perforated treads or solid steel with embedded steel grit for high-traffic areas—those grit strips don’t wear away, even after decades of use.
Wait, let’s talk about slip resistance, because this is the big one, and it’s not just about keeping people from falling. OSHA has specific standards for slip resistance on stair treads, right? We reference that every single time. The standard coefficient of friction (COF) for interior stair treads is 0.5 when dry, and 0.6 when wet. For exterior, it’s even higher—0.8 when wet. Most cheap anti-slip coatings only get you to 0.5 dry, which falls apart when it gets wet. The grit strips we use—they’re made from aluminum oxide, the same stuff used in sandpaper—have a COF of over 1.2, even when wet or covered in snow. That’s not overkill. That’s what keeps people from getting hurt.
Now, style and functionality. Tread design doesn’t have to be ugly. A lot of customers think if they need safety, they have to sacrifice the look they want. That’s not true. For modern homes, we offer a sleek, flat steel tread with a subtle integrated grit line—you can barely see it until you run your hand over it, and it doesn’t take away from the minimalist aesthetic. For industrial spaces, perforated treads are open, lightweight, and let light through, which is good for warehouses or mezzanines where overhead lighting is limited. For commercial storefronts, we can do wood-inlaid treads, where the steel base has a strip of solid hardwood embedded in it—this gives you the warmth of wood, paired with the durability of steel, and the grit strip along the edge keeps people from slipping. A client in Manhattan used that on their retail staircase, and they told me customers always comment on how comfortable it is to walk on, even in winter when their delivery boxes get dirty and wet.
Wait, let’s not forget about maintenance. That’s another thing customers overlook. How much time are you willing to spend cleaning the treads? If it’s an outdoor staircase with perforated treads, leaves and small debris will fall through the holes—all you have to do is blast it with a hose once a month, or sweep it, and it’s good. If you have a solid steel tread with a grit coating, you have to scrub it occasionally to keep the grit exposed. If it’s a wood-inlaid tread, you have to re-seal the wood every couple of years. Perforated and serrated treads are the lowest maintenance, hands down. We had a maintenance manager at a warehouse in Chicago tell us that since we installed serrated treads on their mezzanine staircase, they haven’t had to replace a single tread part in seven years. That’s the kind of long-term value that matters, not just the upfront cost.
Let me talk about the most common mistakes we see customers make, because knowing what to avoid is just as important as knowing what to choose. First, going cheap on anti-slip features. I get it—everyone wants to save money. But that $0.50 extra per tread you skip on grit strips could end up costing you thousands in liability, or even a lawsuit if someone gets hurt. Second, ignoring the environment. A staircase made for Phoenix, which is dry and hot, won’t work in Seattle, where it rains 150 days a year. We had a customer in Seattle who tried to use the same smooth steel tread he used for a garage in Phoenix, and within six months, the coating had peeled off, leaving him with a slippery mess. Third, forgetting about compatibility with your stringer. Some tread designs only work with certain stringers—perforated treads, for example, need to be welded or bolted securely to the stringer, so if you have a pre-cut stringer, you need to make sure the tread you pick will fit. That’s one thing our team checks before we even order parts—we don’t want to show up to install and realize the treads are too wide or too narrow for the stringer.
Now, let’s get specific with recommendations, because I know you want actionable advice, not just theory. If you’re building a residential steel staircase: if it’s indoors, go with solid steel treads with embedded aluminum oxide grit. They look clean, are easy to walk on, and meet all safety standards. If it’s outdoors, go for either perforated steel treads with grit, or serrated steel treads—both shed water and snow way better than solid. For commercial staircases: high-traffic areas, like staircases in office buildings or retail stores, go with perforated treads. They’re durable, low maintenance, and keep the space well-lit. For industrial staircases, like warehouse or factory staircases, go with heavy-duty serrated treads. They can handle forklift traffic in some cases (we’ve done that!) and are resistant to oil, grease, and heavy foot traffic. For staircases with a modern or industrial aesthetic, open riser steel staircases—perforated treads work beautifully here, because they keep the space feeling open and not clunky.
Wait, I should mention custom options, too. Not every project is standard. We did a project for a brewery in Portland, where they wanted a staircase that would show off their branding. We worked with them to do custom powder-coated steel treads, with a subtle anti-slip pattern embossed into the surface, and a grit strip in their brand’s color. It looked amazing, and it met all OSHA safety standards. That’s the benefit of working with a steel structure staircase supplier that’s not just selling pre-made parts—we can customize every part, including treads, to fit your vision, without sacrificing safety.
Another thing to consider: noise. If you’re building an indoor staircase, a smooth steel tread might be louder than a tread with a rubber or foam insert. We offer that too—treads with a rubber underlayment that cuts down on noise, perfect for residential homes or office buildings where people walking up and down the stairs might disturb other people. It’s a small detail, but it makes a big difference in how functional the staircase feels.
Let me circle back to that Brooklyn coffee roaster story, because it’s still fresh in my mind. We fixed their staircase by swapping out the smooth solid treads for perforated ones with heavy grit strips. The next winter, they texted us a photo of a snow-covered staircase, and said “we haven’t had a single slip all season.” That’s the payoff of getting the tread right. It’s not just about building a staircase that’s strong enough to hold weight—it’s about building something that works for the people who use it every single day.
At the end of the day, choosing the right tread design for a steel structure staircase isn’t rocket science. It’s about asking the right questions: where is this going? How much use will it get? What safety standards do I need to meet? How much maintenance do I want to do? When you answer those, the right tread becomes obvious.
If you’re in the middle of planning a steel structure staircase, and you’re stuck on what tread to pick—whether it’s residential, commercial, industrial, whatever—our team is here to help. We’ve installed thousands of staircases, all over the country, in every environment you can imagine. We can walk you through your options, show you examples of similar projects, and make sure you get a tread that’s safe, durable, and fits your vision. Don’t leave the most important part of your staircase to guesswork. Reach out to us to start the conversation about your next steel structure staircase project.
Steel Workshop References
Occupational Safety and Health Administration. (2023). Safety Standards for Stairways and Ladders. U.S. Department of Labor.
Steel Structures Painting Council. (2021). Corrosion Protection for Steel Components in Exterior Environments. National Association of Corrosion Engineers.
American National Standards Institute. (2022. Standard for Slip Resistance of Walking Surfaces. ANSI/BHMA A117.1.
Suzhou Wanyu Steel Structure Construction and Installation Engineering Co., Ltd.
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