Steel Bar Grating & Stair Treads

G = Available Galvanized

Steel bar grating provides reliable strength, slip resistance, and long-term durability for walkways, platforms, stair systems, mezzanines, industrial flooring, and elevated work surfaces. The open-grid design promotes effective drainage, ventilation, and debris passage, supporting safe access in commercial, industrial, municipal, and infrastructure environments. Bar grating is also used in the production of Stair Treads, which may incorporate diamond plate nosing and end plates to support safe and consistent footing on stair assemblies.

Central Steel Supply Company stocks specification-compliant bar grating in multiple sizes, finishes, and patterns, with stair treads available as custom-order items. The following sections outline available dimensions, material types, and typical applications.

Dimensions, Grades, and Value-Added Support

Central Steel Supply Company stocks steel bar grating in size ranges from 1/8″ × 1″ through 3/16″ × 1½” bearing bars and supplies panels in standard dimensions of 36″ × 240″. Smooth and serrated grating profiles are available, with smooth profiles stocked and serrated versions available upon request.

The most common stocked product is 19W4 bar grating, which refers to:

• 19 → as in 19/16 (or approx. 1.19”) center-to-center spacing of the bearing bars (flat bars)
• W → Welded construction
• 4 → 4″ center-to-center spacing of cross bars (twisted square bar)

This 19W4 pattern offers a balanced combination of strength, openness, and weight efficiency suitable for general-purpose industrial flooring and access systems.

Finishes

Steel bar grating is manufactured in accordance with NAAMM MBG-531 industry standards, with material produced to applicable ASTM specifications such as A36 or A1011. Heavy-duty grating may follow ANSI/NAAMM MBG-532 guidelines depending on loading requirements.

Stair Treads

Stair treads made from steel bar grating provide a durable, slip-resistant walking surface for industrial, commercial, and municipal stair systems, with options for smooth or serrated grating, diamond-plate nosing, and end plates; dimensions and configurations vary by application and are custom ordered.

Ladder Rungs

Steel ladder rungs offer a compact, slip-resistant alternative to grating stair treads, supporting safe access in confined or limited-space applications and performing effectively across industrial, commercial, and municipal environments. Central Steel Supply stocks these ladder rungs in a 3-row raised-embossment button-top pattern, manufactured from 13-gauge HRPO material, and measure 1⅝ inches wide by 1⅛ inches deep.

Value-added services can be coordinated to support precise dimensional needs, reduce preparation work on-site, promote installation efficiency, and reinforce strong long-term business relationships by contributing to the overall success of each customer’s business.

Processing Services for Steel Bar Grating Products

Bar grating is supplied in standard panel sizes without additional processing. Although material fabrication is not performed on this product line, Central Steel Supply Company provides value-added service through dependable product expertise, prompt availability, and coordinated material sourcing designed to support overall project efficiency.

Additional benefits include:

• Guidance on grating selection, finish type, and load considerations
• Coordination of grating, stair tread components, ladder rungs, and related materials
• Support from trusted partner resources for specialty requirements
• Streamlined procurement to reduce supplier complexity
• Reliable service that reinforces long-term business relationships and supports each customer’s operational success

CAD File Integration

Trusted partner resources can utilize CAD files and detailed placement drawings to develop the required bar-grating layouts and stair-tread details for a project. This coordinated support promotes dimensional accuracy, clarifies material requirements, and helps streamline planning and sequencing for efficient workflow management.

Industries and Common Applications

Steel bar grating and stair treads support safe, durable access and flooring solutions across a wide range of markets.

• Commercial Construction and Engineering: Walkways, stair systems, platforms, and mezzanine flooring.
• Industrial: Plant floors, equipment platforms, catwalks, ventilation walkways, and processing areas requiring drainage and slip resistance.
• Residential Construction: Exterior stair systems, service walkways, and access platforms for multi-family or mixed-use structures.
• Masonry & Site Work: Access grating, drainage covers, and structural support components used in exterior and site-based environments.
• Municipal & Infrastructure Work: Public access walkways, drainage inlets, utility covers, bridge approaches, and roadway-adjacent access systems.
• Landscape Construction: Pedestrian access grating, deck platforms, elevated walkways, and exterior-grade structural elements.

Contact Us for a Quote Today

Partnering with a supplier that delivers reliable inventory, precise material accuracy, dependable service, and strong technical expertise helps create lasting business relationships and elevates overall customer success. Central Steel Supply Company provides steel products and value-added services that enhance efficiency, reduce delays, and keep projects moving with consistent productivity. Quotes for material availability and processing options are available upon request.