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3 Ways to Weld Steel Door Frames

Steel door frames are widely used in residential, commercial, and industrial construction because of their durability, fire resistance, and security features. A crucial part of ensuring the strength and longevity of these frames is the welding process. Different welding techniques can be applied depending on the installation requirements, site conditions, and door specifications.

In this article, we explore the three main methods of welding steel door frames, their advantages, and where each method is best applied.

1. Face Welding

Face welding is one of the most common methods for securing a steel door frame to the wall opening. In this technique, welds are applied directly to the face of the frame at pre-determined points.

How It Works:
Welds are placed on the exposed face of the frame, usually at the head, jambs, and sill.
After welding, the joints can be ground smooth and painted for a seamless finish.


Best For:
Masonry and drywall installations.
Heavy-duty applications such as fire-rated or security steel doors.

2. Back Welding (or Concealed Welding)

Back welding, also known as concealed welding, is performed on the back side of the frame—the side that will not be visible once the frame is installed.

How It Works:
Welds are applied to the inner returns of the frame, making them hidden from view.
This requires careful alignment of the frame before welding.


Best For:
Architectural projects where appearance matters.
Installations in offices, schools, or public buildings where visible welds may be undesirable.

3. Anchor Welding
Anchor welding is used when the steel frame comes with anchor straps or tabs that are welded directly to the wall structure.

How It Works:
The frame is positioned in the wall opening.
Anchors, usually made of steel straps or angles, are welded to steel studs, rebar, or structural steel within the wall.
Once welded, the wall material (masonry, drywall, or concrete) conceals the anchors.

Tools & Equipment Needed
Welding machine (CO2 shielding welding machine/MIG/TIG)
Welding helmet, gloves, and safety gear
Clamps and braces for positioning
Angle grinder for smoothing welds
Measuring tools (tape, square, level)

YoYi Machinery
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E-mail: [email protected]
Web: www.yoyimachinery.com
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