Mac-Girt Substructural Component

A versatile, heavy-duty sub-girt designed for strength and simplicity.

The McElroy Metal Mac-Girt is a robust substructural member used to support wall and roof panels, create spacing, and transfer loads across building assemblies. Its cold-formed shape offers excellent strength and compatibility, making it ideal for both new construction and retrofit applications.

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Mac-Girt Substructural Component Specs at a Glance

Shape Type:

Common Uses:

Web Dimensions:

Flange Widths:

Gauge Options:

Material:

Finishes:

Lengths:

Optional Features:

Cold-formed Mac-Girt section

Wall and roof panel support, retrofit framing, load transfer, and sub-girt assembly

1 ½” tall

N/A

16 Ga, 18 GA, 20 GA

High-strength structural steel, ASTM A653 or equivalent

Galvanized

3’ to 30’

N/A

Mac-Girt Substructural Component Ideal Applications

Wall and roof panel support providing consistent attachment and load distribution.
Sub-girt framing for metal wall systems.
Vertical and horizontal girt installations across a range of wall configurations.
Retrofitting over existing walls to create a new attachment plane.
Load-transfer reinforcement within cladding systems.

Mac-Girt Substructural Component Top 3 Benefits

Versatile Installation Orientation: Can be used as a horizontal or vertical girt depending on project requirements.
Multiple Gauges: Available in several thicknesses to meet load, span, and spacing needs.
Compatible with Multiple Wall Systems: Integrates easily with McElroy Metal wall panels, retrofit systems, and other substructural components.

Literature
Product Info
SDS - Substrate & Paint
Submittals
Substructural Section Properties

Brochures/Flyers

2025 Product Catalog

Product Data Sheets

Substructural Parts Product Data

Product & Trim Information Books

Substructural Components Product Information Book

SDS - Substrate & Paint

Galvanized Safety Data Sheet Gray Purlin Safety Data Sheet

Download All

General Product and Warranty Information

Panel Load Tables w/Section Properties and Testing

Safety Data and Material Safety Data Sheets

Substructural Section Properties

Hat, Channel, Mac-Girt, Sub-Girt Effective Section Properties Hat, Channel, Mac-Girt, Sub-Girt Gross Section Properties

Notes & Manufacturing Locations

Manufactured in: Sunnyvale, TX

Find a Distributor / Contractor Near You

Whether you’re building a new home or planning renovations, a metal roof can deliver long-term cost savings and comfort. To explore your options and find the product that meets your aesthetic and budgetary needs, contact a McElroy Metal distributor or contractor in your area today. We can’t wait to help make your dream home a reality.

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Frequently Asked Questions

The questions below address common considerations and help guide product selection for your project.

What is the primary use of the Mac-Girt?

It supports wall and roof panels while providing spacing, load transfer, and structural alignment.

Is the Mac-Girt different from a standard sub-girt?

Yes. The Mac-Girt is typically heavier-duty and offers broader compatibility across various panel systems and retrofit assemblies.

Do you offer multiple gauges and sizes?

No. We offer the Mac-Grit in 1 ½” height only.

Are both galvanized and red oxide primer offered?

No. Our Mac-Girt is offered only in a galvanized finish.

Why Choose McElroy Metal

McElroy Metal is an employee-owned manufacturer with more than six decades of experience producing high-quality metal roofing, wall systems, and substructural components. Our nationwide manufacturing and service center network ensures consistent availability, responsive support, and dependable delivery. Built on a culture of craftsmanship and partnership, our products are engineered for long-term durability and trusted performance on projects of every size.