Technical Specifications

Manufacturing capabilities and tolerances

Inspect our dimensional standards, certified quality baselines, and bespoke fabrication capacities across steel, aluminum, and stainless alloys.

Standard Manufacturing Tolerances

Calibrated dimensional thresholds maintained across all production runs

Spec #1
Sheet & Plate Thickness
Tolerance Limit+/- 0.005 in (0.127 mm)
Range: Gauge ranges: 26 ga to 1/2 in plate
Best for: Perforated sheets, solid blanks
Spec #2
Perforation Hole Diameter
Tolerance Limit+/- 0.004 in (0.100 mm)
Range: Round, square, slotted & hex patterns
Best for: Filtration & acoustic panels
Spec #3
Expanded Metal Strand Width
Tolerance Limit+/- 0.008 in (0.203 mm)
Range: Raised & flattened diamond profiles
Best for: Security grilles, catwalks
Spec #4
Bar Grating Bearing Spacing
Tolerance Limit+/- 1/16 in per 3 ft panel
Range: 19-W-4, 15-W-4, heavy-duty welded
Best for: Industrial flooring, drainage

Industry Standards Followed

Strict adherence to structural, mechanical, and material quality codes

ISO 9001:2015
Quality Management System

Complete trace-certified lot tracking, verified mill test reports (MTR), and dimensional verification prior to shipment.

AWS D1.3 / D1.1
Structural Welding Code

Certified sheet steel welding and heavy-gauge structural fabrication for commercial construction and load-bearing framing.

ASTM Standards
Material & Coating Compliance

Full compliance with ASTM A36 (Carbon Steel), ASTM A240 (Stainless 304/316), and ASTM B209 (Aluminum alloys).

NAAMM MBG 531
Metal Bar Grating Manual

Load capacity calculations, deflection tolerances, and manufacturing guidelines for standard and heavy-duty bar grating.

Custom Fabrication Options

Tailored processing to meet project-specific architectural and mechanical requirements

Custom Punching & Tooling
CNC turret presses capable of staggered, straight, and architectural custom decorative patterns across gauges up to 0.375 in.
Precision Shearing & Laser Cutting
Clean edge shearing up to 14 ft lengths and multi-axis fiber laser cutting for tight-radius architectural profiles.
Forming, Rolling & Notching
Press brake forming, margin blanking, corner notching, and cylinder rolling for filtration cylinders and facade cassettes.
Industrial Finishing & Coating
In-house hot-dip galvanizing, electrostatic powder coating, anodizing, and electropolishing for harsh coastal or chemical service.

Need non-standard gauges or specialized pattern geometry?

Our engineering team reviews custom drawings, CAD models, and RFQs within one business day.

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Browse technical resources

Access product specifications, engineering calculators, design guides, and compliance standards.

Product Specifications

Detailed specs for perforated metal, expanded metal, and bar grating.

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Materials & Finishes

Material options and surface finishes explained.

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Selection & Design Guides

Guidance for choosing the right product for your project.

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Standards & Compliance

Industry standards relevant to our product lines.

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Engineering & Calculations

Interactive tools for open area, weight, and load estimates.

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Installation & Maintenance

Installation steps and maintenance guidance.

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Glossary

Key terminology used across our product lines.

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Technical Guidance

Frequently asked questions

Find technical answers on alloy selection, production lead times, and custom fabrication specs.

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We fabricate using carbon steel (hot-rolled and cold-rolled), 304 and 316 grade stainless steel, and 3003-H14/5052-H32 aluminum alloys. Galvanized, electro-polished, and powder-coated surface treatments are applied upon request to meet ASTM and ISO 9001 environmental standards.

ASTM A1008 / A240 / B209
Engineering Verified

Have custom specs?

In-house engineering team

Send your mechanical drawings, custom perforation patterns, or bar grating schedules directly to our estimators.

(86) 180-3366-6533sales@mutualmetal.com
Submit RFQ with drawings

Estimates returned within 24 business hours

Standards ComplianceISO 9001

All fabricated metal shipments include full mill test reports (MTR) and compliance certificates verifying mechanical properties and gauge tolerances.