Steel Grating Fasteners: G-Clips, GrateFix™ & FloorFix™ Guide | LNA Solutions

What Are Steel Grating Fasteners?

Steel grating fasteners are load-rated mechanical clips and anchors that attach open bar grating panels to their supporting structural steel framework. They are a standard alternative to field welding on industrial platforms, mezzanines, walkways, drainage covers, and stair treads.

Unlike welding, mechanical grating fasteners require no hot work permits, no certified welders, and no permanent modification to the supporting structure. Grating panels secured with mechanical clips also remain removable — a practical requirement on any platform that needs maintenance access underneath.

According to the National Association of Architectural Metal Manufacturers (NAAMM), open bar grating is one of the most widely used flooring materials in industrial construction. Proper fastening is critical to panel stability, safety compliance, and long-term performance under dynamic and static loads.

LNA Solutions manufactures three primary steel grating fastener systems for North American construction: the Grating Clip (G-Clip), GrateFix™, and FloorFix™ / FloorFix HT™. Each serves a distinct application.

The 3 Types of Steel Grating Fasteners from LNA Solutions

1. Grating Clip (G-Clip) — Standard Saddle Clip for Open Bar Grating

The G-Clip is the most common style of open steel flooring fastener. It provides a quick, cost-effective method for clamping grating panels to structural steel flanges — installed entirely from the top side with basic hand tools.

How it installs: Drop the G-Clip into the open grating, slide it toward the supporting beam flange, and tighten with a standard 7/16″ nut driver. No underside access, no drilling, no welding.

Materials available: Hot-dip galvanized carbon steel (standard) and stainless steel for corrosive environments.

G-Clip GM is a three-part variant for mounting devices onto grating surfaces. It features a stamped top, threaded stud, and lower body assembly — and can withstand up to 1,000 lbs of direct upward pull force with no distortion. Installed with a spanner wrench or adjustable open-end wrench.

Finish: Hot-dip galvanized to BS EN ISO 1461. Manufactured from ductile iron to BS EN 1563.

Best for: Standard pedestrian platforms, catwalks, and mezzanines with typical grating bar spacing of 1-3/16″ to 1-5/8″ centers.

2. GrateFix™ — Heavy-Duty Grating Clip, TÜV Vibration Tested

GrateFix™ is an engineered heavy-duty grating clip for securing open steel flooring to structural steel flanges in demanding industrial environments. Like the G-Clip, it installs from the top side only — but its cast bottom piece provides significantly greater clamping strength and is rated for vibration conditions.

How it installs:

1. Lower GrateFix™ through the open part of the grating. Ensure the bracket is seated over adjacent bearing bars.
2. Slide GrateFix™ toward the supporting steelwork flange as far as it will go to ensure maximum clamping force.
3. Tighten the screw until the upper casting rotates and one of the steps locates on the bearing bar.

Key distinction from a standard G-Clip: GrateFix™ has been independently tested for vibration conditions at TÜV — the German technical inspection authority. This makes it the specified choice for platforms adjacent to operating machinery, pumps, compressors, or any structure subject to dynamic loading.

Available lengths for GF1G10: 1-5/8″ bar depth (GF1G10-75), 2-1/8″ bar depth (GF1G10-90), 2-5/8″ bar depth (GF1G10-100), 3-1/8″ bar depth (GF1G10-110).

Best for: Industrial processing plants, oil and gas facilities, power generation platforms, food processing, and any application near operating equipment where vibration is a factor.

3. FloorFix™ and FloorFix HT™ — Solid Plate Floor Fasteners

FloorFix™ and FloorFix HT™ are designed for securing solid steel plate flooring (not open bar grating) to structural steel supports — from the top side only, without drilling, tapping, bolting through, or welding.

FloorFix™ is the standard version for typical industrial floor plate applications. It is manufactured from ductile iron with a hot-dip galvanized finish and allows easy repositioning or lifting of floor plates for maintenance access.

FloorFix HT™ is the upgraded cam-mechanism version. It accommodates steel flanges from 1/8″ to 1″ thick without packing pieces and allows ±1/4″ construction tolerance. The tightening action operates with a basic hex key drive — no special tools required.

All FloorFix™ products: Manufactured from ductile iron. Hot-dip galvanized. TÜV vibration tested (FloorFixM10 vibration testing completed at 2′-0″ o.c.).

Best for: Solid plate mezzanine floors, access platforms, trench covers, and maintenance walkways — particularly where the structure needs to be periodically opened for inspection or service.

Side-by-Side Comparison: Which Steel Grating Fastener Do You Need?

Use this table to quickly match your application to the right LNA Solutions fastener system.

How to Choose the Right Steel Grating Fastener: 3 Steps

Selecting the wrong fastener wastes time and can compromise platform safety. Follow these three steps before specifying.

Step 1: Identify Your Flooring Type

Are you fastening open bar grating (the grid-style panels with visible gaps) or solid steel floor plate? G-Clips and GrateFix™ are designed for open bar grating. FloorFix™ and FloorFix HT™ are designed for solid plate. This is the first decision point — and it eliminates half the options immediately.

Step 2: Assess Your Load and Vibration Conditions

Standard pedestrian platforms with typical foot traffic → a G-Clip is usually sufficient. Platforms adjacent to pumps, compressors, conveyors, or other operating equipment → GrateFix™ or FloorFix HT™ are the specified choice. Both are independently tested for vibration conditions at TÜV — a standard requirement for process industry applications. The OSHA Walking-Working Surfaces standard (29 CFR 1910 Subpart D) requires that all floor openings and platforms meet load and stability requirements — mechanical fasteners with verified load ratings satisfy this requirement.

Step 3: Check Your Bearing Bar and Flange Dimensions

Each fastener is sized to a specific range of bearing bar widths and structural flange thicknesses. Before ordering, confirm:

• Grating bearing bar width and depth
• Grating bar center-to-center spacing
• Supporting steel flange thickness

These three measurements determine which part number to specify. LNA’s engineering team can confirm the correct selection at no charge — see the CTA below.

Where Steel Grating Fasteners Are Used

LNA Solutions’ grating fastener systems are used across a wide range of industrial, commercial, and infrastructure applications in North America:

• Industrial mezzanines and work platforms — manufacturing plants, warehouses, and distribution centers
• Oil, gas, and processing plants — environments where no hot work is permitted and grating must remain accessible for inspection
• Power generation facilities — turbine decks, boiler rooms, and maintenance walkways
• Food and beverage processing — stainless steel GrateFix™ (316) meets hygiene requirements for wash-down environments
• Drainage trench covers — removable panels with reliable fastening over utility trenches
• Stair treads — securing open grating treads to stair stringers without modifying the structure
• Retrofit and expansion projects — mechanical fasteners preserve the existing steel coating and structural integrity, unlike welding

For a broader look at how LNA products are used across industries, see our applications library.

Why Engineers Choose Mechanical Grating Fasteners Over Welding

Field welding of grating panels was standard practice for decades, but mechanical fasteners have largely replaced it on new construction and retrofit projects for several practical reasons.

OSHA’s hot work standard (29 CFR 1910.252) requires a written permit, fire watch, and hazard assessment before any welding in a facility. In operating plants where grating is often installed near flammable materials, this requirement alone makes mechanical fasteners the more practical choice.

For a deeper look at this comparison, see our post: Bolting vs. Welding Steel Beam Connections. For no-weld attachment to structural beams more broadly, see: How to Attach Things to a Steel Beam Without Welding or Drilling.

Download the Steel Floor Fasteners Catalog

The LNA Solutions Steel Floor Fasteners catalog includes full specification tables, part numbers, installation diagrams, and dimensional data for all G-Clip, GrateFix™, FloorFix™, and FloorFix HT™ products. Download it to share with your project team or use for specification writing.

Frequently Asked Questions

What is a grating clip used for?

A grating clip is a mechanical fastener that secures open bar grating panels to the flanges of structural steel supports without welding or drilling. Grating clips prevent panels from lifting, shifting, or vibrating loose under foot traffic and dynamic loads. They are installed from the top side only and allow the grating to be removed when maintenance access is needed.

What is the difference between GrateFix™ and a standard G-Clip?

G-Clips are standard saddle clips suitable for typical pedestrian platforms with normal load conditions. GrateFix™ is a heavy-duty engineered grating clip with a cast bottom piece that provides greater clamping strength. GrateFix™ has been independently tested for vibration conditions at TÜV, making it the specified choice for industrial environments near operating machinery, pumps, or conveyors.

Can steel grating be installed without welding?

Yes. Mechanical grating fasteners — including G-Clips, GrateFix™, and FloorFix™ — secure steel grating and floor plate to structural supports using bolted or cam-lock clips with no welding or drilling required. This is standard practice in North American industrial construction, particularly in operating facilities where hot work permits are restricted or where grating must remain removable for inspection.

What is FloorFix HT™ used for?

FloorFix HT™ is a top-side floor plate fastener with a cam mechanism that accommodates steel flanges from 1/8″ to 1″ thick without packing pieces and allows ±1/4″ construction tolerance. It is the recommended choice where vibration conditions are present — the 1/2″ version (FLOORFIXM12HT) is specified for vibration applications because it can be tightened to a higher torque.

What finishes are available for steel grating fasteners?

LNA Solutions grating fasteners are available in hot-dip galvanized carbon steel (standard for most applications), 304 stainless steel, and 316 stainless steel. The 316 stainless option is recommended for corrosive environments including chemical processing, food and beverage, marine, and wash-down applications.

Do steel grating fasteners meet OSHA requirements?

LNA Solutions grating fasteners are load-rated engineered products that secure grating panels to comply with OSHA’s Walking-Working Surfaces standard (29 CFR 1910 Subpart D). All products are independently tested. For project-specific code compliance questions, LNA’s engineering team provides free technical support.

Ready to Specify?

LNA Solutions stocks G-Clips, GrateFix™, FloorFix™, and FloorFix HT™ in Buffalo, NY for fast North American shipping. Our engineering team provides free specification support — send us your grating dimensions, flange thickness, and application details and we’ll confirm the right product and part number for your project.

All technical specifications verified from the LNA 2024 Steel Connection Solutions Catalog. For the most current product data and availability, contact LNA Solutions directly.