Weld the Puck, Keep the Swivel
The STWD5K pairs the ALPHA swivel anchor with a weld-on mounting puck, included in the bag. Weld the puck to qualifying structural steel and the anchor threads on to give one worker a 5,000 lb rated tie-off whose D-ring swivels a full 360° and pivots front to back through 180°. The anchor head is reusable — the weld-on mounting kit stays on the structure and can be easily replaced when the crew moves to the next work area.
Rated at 5,000 lbs tensile strength with a 310 lb maximum user capacity, the ALPHA is finished in galvanized zinc with yellow passivation for indoor and outdoor corrosion protection, supports permanent and temporary installations, and works in vertical, horizontal, or overhead orientations. It meets ANSI Z359.18 and Z359.7 and is built for OSHA 1910 and 1926 work.
Who Needs This Product
This product is an anchorage connector — the fixed tie-off point of a personal fall protection system. The welded puck on structural steel is the anchorage interface; the worker wears a full body harness; a lanyard or self-retracting lifeline connects the two. Weld pucks at recurring work locations and one ALPHA head services all of them.
Features
Weld-on puck included
The weldable mounting puck ships in the bag — weld it once and the anchor point is always where the work is.
360° swiveling D-ring
The D-ring rotates a full circle and pivots 180° front to back, keeping the connecting device aligned with the worker.
Reusable anchor head
The swivel head removes from the puck and moves to the next welded mount — buy extra pucks, not extra anchors.
Permanent or temporary
Supported for both permanent installations and temporary anchor points on steel structures.
Corrosion protected
Galvanized zinc with yellow passivation performs outdoors and indoors alike.
Any orientation
Use it in vertical, horizontal, or overhead applications on qualifying steel.
Technical Specifications
| SKU | STWD5K |
|---|---|
| Type | ALPHA swivel steel anchorage connector with weld-on puck |
| Tensile strength | 5,000 lbs |
| Maximum user capacity | 310 lbs (single user) |
| Anchor weight | 1.2 lbs |
| Material | Steel |
| Finish | Galvanized zinc with yellow passivation |
| D-ring articulation | 360° swivel; 180° front-to-back pivot |
| Key dimensions | 4.8 in (123 mm) tall; 3 in (76 mm) base; 2 in (53 mm) ring |
| Installation | Weld-on puck (included); anchor head threads onto puck |
| Standards | ANSI Z359.18, ANSI Z359.7; OSHA 1910, OSHA 1926 |
Certified welds only. The welded puck is the load path. Welding must be performed by a qualified welder to the user manual requirements, on structural steel a competent person has verified for the loads involved. One worker per anchor point, 310 lbs maximum including tools.
Compliance Standards
ANSI Z359.18
Meets the American National Standard for anchorage connectors used in personal fall protection systems.
ANSI Z359.7
Third-party product testing and certification requirements of the Z359 fall protection code.
OSHA 1910
Suitable for general industry fall protection applications when installed per the manual.
OSHA 1926
Suitable as an anchorage connector under OSHA construction fall protection rules.
Typical Applications
Installation Overview
Follow the manufacturer's manual. The sequence below is an overview only.
- Verify the steel. A competent person confirms the structural steel substrate can support the loads required by the manual.
- Weld the puck. A qualified welder welds the included puck to the steel per the user manual weld specification.
- Inspect the weld. Verify the completed weld meets the manual requirements before loading.
- Mount the anchor. Thread the ALPHA swivel head onto the welded puck and torque per the manual.
- Check articulation. Confirm the D-ring swivels and pivots freely with no binding or play.
- Connect and relocate. Attach the lanyard or SRL; when work moves, take the head to the next welded puck.
Inspection and Retirement
Inspect before each use, with a documented competent-person inspection at least every 6 months. Pull the equipment from service for any of the conditions below.
- Weld and puck: cracks, undercut, corrosion, or any visible weld defect.
- Base and body: deformation, cracks, or corrosion in the steel.
- D-ring: smooth 360° swivel and 180° pivot with no binding, spreading, or excessive play.
- Threaded connection: full engagement between head and puck, no thread damage.
- Markings: product label and rating legible.
Retirement triggers: any fall arrest loading, weld or puck damage, a D-ring that binds or has spread, deformation or corrosion, or any condition where the inspector cannot verify the anchor is fit for service. Damaged pucks must be removed from service even if the head passes inspection.
Fall ProtectionDistributors, LLC Free Tool · No Signup · OSHA 1926.502 Free Interactive Tool Fall Protection Calculator Pick your system. Run the math. Generate a plan. 1Pick Your SystemDetermine fall restraint vs. fall arrest based on your work surface, edge access, and clearance. 2Run the MathCalculate exact fall clearance required below the work surface for your SRL or lanyard setup. 3Generate a PlanGet a printable OSHA-compliant Fall Protection Plan structured around 29 CFR 1926.502(k).
Frequently Asked Questions
Frontline STWD5K Submittals and Documentation
Frontline STWD5K Spec Sheet (PDF)Dimensions, materials, strength ratings, and the full compliance summary. Frontline STWD5K Test Report (PDF)Third-party laboratory test results documenting the strength rating. Frontline STWD5K User Manual (PDF)Welding, installation, use, inspection, and retirement procedures.Compatible and Related Products
- Frontline STB5K ALPHA Swivel Steel Anchor. The bolt-on version of the same ALPHA swivel anchor.
- Frontline STW01 Weld-on Steel Anchor. A fixed weld-on plate anchor for permanent steel points.
- Frontline STB01 Steel Bolt Threaded Anchor 3-Pack. Three forged threaded steel anchors in one economical pack.
- Frontline RO4W Multifunction 4-Way Anchor. A multifunction anchor for wood, steel, concrete, and standing seam.
Welding Anchor Points onto Steel?
Need help specifying the right system for your jobsite? Confirm your application, anchorage, and clearance with us and we will walk through the kit list so the right equipment ships together.
Call 863-703-4522 to talk to a fall protection specialist.
