A Permanent Tie-Off Point, Welded Where You Need It
The STW01 is a weld-on anchor that turns any qualifying steel member into a permanent, dedicated tie-off point. It is made of ASTM rated steel for reassured product reliability, with a 3/8 inch thick base plate and a 5 by 3 inch footprint that welds to most structural steel substrates. At 1 lb total and small enough to fit in the palm of your hand, it disappears into the structure — until somebody needs it.
Rated at 5,000 lbf (22 kN) tensile strength with a 310 lb maximum user capacity, the STW01 meets ANSI Z359.1-2007 and A10.32-2012 and is built for OSHA 1926.502 construction and 1910 general industry work. Welding should be performed by AWS certified welders to ensure quality welding and the utmost compliance. Sold as a 2-pack — two complete anchors ship together for $149.
Who Needs This Product
This product is an anchorage connector — the fixed tie-off point of a personal fall protection system. The steel member it is welded to is the anchorage; the worker wears a full body harness; a lanyard or self-retracting lifeline connects the two. Weld STW01s at every recurring work location and the tie-off point is already there when the crew arrives.
Features
ASTM rated steel
Made of ASTM rated steel for reassured product reliability and consistent quality, weld after weld.
Welds to most structural steel
Installs on most structural steel substrates — columns, beams, tanks, and plant steel.
AWS certified installation
Designed for installation by AWS certified welders to ensure weld quality and the utmost compliance.
Ready out of the bag
No kit assembly and no extra hardware — the anchor is ready to weld on arrival.
Compact and low profile
A 5 by 3 inch base with a 2.5 inch D-ring profile stays out of the way of the work.
Permanent by design
Once welded and inspected, the point is always rated, always inventoried, always there.
Technical Specifications
| SKU | STW01 |
|---|---|
| Type | Weld-on steel anchorage connector |
| Tensile strength | 5,000 lbf / 22 kN |
| Maximum user capacity | 310 lbs (single user) |
| Total weight | 1 lb |
| Material | ASTM rated steel |
| Base thickness | 3/8 in |
| Base footprint | 5 in (127.5 mm) x 3 in (76 mm) |
| D-ring profile | 2.5 in (63 mm) |
| Installation | Weld-on, by AWS certified welders per the manual |
| Standards | ANSI Z359.1-2007, ANSI A10.32-2012; OSHA CFR 1926.502, CFR 1910 |
The weld is the anchor. The STW01 carries its rating only when welded by an AWS certified welder to the user manual specification, on structural steel a competent person has verified for the loads involved. Inspect the weld before every use. One worker per anchor, 310 lbs maximum including tools.
Compliance Standards
ANSI Z359.1-2007
Meets the American National Standard safety requirements for personal fall arrest system components.
ANSI A10.32-2012
Meets the ANSI standard for personal fall protection used in construction and demolition operations.
OSHA CFR 1926.502
Designed to the OSHA construction criteria for fall protection systems and anchorage strength.
OSHA CFR 1910
Suitable for general industry fall protection applications when installed per the manual.
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 member can support the loads required by the manual.
- Position the anchor. Locate the STW01 so the loaded D-ring lines up with the work area and load direction.
- Weld it. An AWS certified welder welds the base to the steel per the user manual weld specification.
- Inspect the weld. Verify the completed weld meets the manual requirements before the anchor is ever loaded.
- Document the point. Add the anchor to the site anchor inventory and inspection schedule.
- Connect. Attach the lanyard or SRL connector to the D-ring; one worker per anchor.
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: cracks, undercut, porosity, corrosion, or any visible weld defect.
- Base plate: deformation, bending, or thinning of the 3/8 in plate.
- D-ring: deformation, nicks, gouges, or wear at the connection point.
- Corrosion: active rust on load-bearing surfaces of plate or ring.
- Markings: product label and rating legible.
Retirement triggers: any fall arrest loading, weld or plate damage, D-ring deformation, significant corrosion, or any condition where the inspector cannot verify the anchor is fit for service. A failed weld inspection takes the point out of service until it is repaired and re-verified.
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 STW01 Submittals and Documentation
Frontline STW01 Spec Sheet (PDF)Dimensions, materials, strength ratings, and the full compliance summary. Frontline STW01 Test Report (PDF)Third-party laboratory test results documenting the strength rating. Frontline STW01 User Manual (PDF)Welding, installation, use, inspection, and retirement procedures.Compatible and Related Products
- Frontline STWD5K ALPHA Swivel Weld-on Anchor. A weld-on puck system with a removable 360-degree swivel head.
- Frontline SBW01 Weld/Bolt-on Steel and Concrete Anchor. The dual-substrate version that also bolts to concrete.
- Frontline STB01 Steel Bolt Threaded Anchor 3-Pack. Reusable threaded steel anchors when welding is not an option.
- Frontline RO Commercial Roof Anchor. The ANSI Z359.18 roof anchor for concrete, metal, and wood decks.
Specifying Permanent Weld-on Anchor Points?
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.
