Welded bar grating for high-load industrial floors
Welded bar grating consists of rectangular bearing bars joined perpendicular to cross bars through high-heat, electric-resistance welding. As the most common structural grating type, it delivers unified strength for industrial floors, trench grates, and access walkways.
Technical Overview
- Process
- Electric-Resistance Welded
- Standard Spacing
- 19-W-4 & 15-W-4
- Bearing Bar Depth
- 3/4 in to 7 in (19 mm – 178 mm)
- Bar Thickness
- 1/8 in, 3/16 in, 1/4 in, 3/8 in, 1/2 in
- Top Surface
- Plain or Serrated (Slip-Resistant)
Standard spacing configurations
Cross bars are forged into rectangular bearing bars under extreme pressure and current to form a single rigid panel.
Available material grades
Select alloys based on environmental exposure, chemical contact, load rating, and structural support constraints.
ASTM A36 Carbon Steel
Mill finish, painted, or Hot-Dip Galvanized (ASTM A123)
Heavy structural flooring, manufacturing plants, and exterior drainage channels.
Stainless Steel 304 / 316
Mill clean or electropolished
Food processing facilities, marine docks, and corrosive chemical environments.
6063-T6 Aluminum
Mill finish or anodized
Lightweight architectural sunscreens, water treatment catwalks, and pump platforms.
Load capacities up to 7-inch bar depths
From lightweight walkways up to heavy continuous spans supporting vehicular loads, bearing bars are custom-engineered for your clear span requirements.
Consult an engineerIndustrial Flooring & Catwalks
Rigid non-slip walking surfaces that allow light, air, and liquid passage.
Heavy Trench & Drain Covers
Engineered bearing bar depths up to 7 in for vehicular and forklift traffic.
Safety Stair Treads
Prefabricated with checker plate nosing or cast abrasive front edges.
Platform & Mezzanine Decking
High strength-to-weight ratio to maximize span distances between structural beams.
Engineering specifications
Review standard dimensions, bar spacings, and structural metal grades engineered for heavy-duty spans.
Available in 1/8 in and 3/16 in bar thicknesses with smooth or serrated slip-resistant surfaces.
19-W-4 provides 1-3/16 in center-to-center bearing bar spacing; 15-W-4 provides closer 15/16 in spacing for high pedestrian traffic.
Engineered load-bearing limits suited for vehicular traffic, industrial catwalks, platforms, and trench covers.
Available materials & alloy standards
Fabricated to ASTM and NAAMM architectural and industrial standards.
ASTM A36 Carbon Steel
ASTM A123 / A36Heavy industrial, highway trenches, and general structural platforms requiring maximum rigidity.
Stainless Steel 304 / 316
AISI 304 / AISI 316LChemical processing, marine environments, water treatment plants, and sanitary food facilities.
6063-T6 Aluminum
ASTM B221Architectural screens, wastewater walkways, marine docks, and weight-sensitive installations.
Need custom load calculations or deflection tables?
Our engineering team verifies uniform live load, concentrated point load, and deflection ratings for any project layout.
Need custom specifications or standard panels?
Send your dimensional takeoff or structural loading requirements for an itemized manufacturer quote.