ST18AV Aluminum I-Beam Fixed Anchor
The ST18AV is a fixed I-beam anchor that clamps onto a vertical or horizontal beam to create a solid anchor point - and it does it at 5 lbs, because the hex bar and jaws are aluminum alloy. It installs in just seconds: adjust the turn locking adjusters to the I-beam width from either side, seat the jaws, and the anchor is set. No tools, no hardware loose on the steel.
The alloy steel D-ring is centered on the anchor and moves vertically or horizontally for free movement, so the connecting device follows the worker around the task without tangling. It fits I-beams from 4 inches wide up to 18 inch wide flanges, with a 5,000 lb tensile strength and a 425 lb maximum capacity, and pairs with either a self-retracting lifeline or a shock-absorbing lanyard. Conforms to ANSI Z359.18 and Z359.7 and aligns with OSHA 1926 Subpart M and 1910.140 as listed on the spec sheet.
Who Needs This Product
This product is a fixed I-beam anchorage connector - a stationary anchor point on a vertical or horizontal beam, built light enough to live in a gear bag. Crews that climb to the work pick the ST18AV because aluminum keeps the carry weight at 5 lbs while the 4 to 18 inch jaw range covers nearly any building beam. Suitable for a single user connection - each worker still needs a full body harness and a compatible connecting device attached to the D-ring.
Features
Extremely lightweight
Aluminum alloy hex bar and jaws bring the whole anchor to 5 lbs without giving up strength.
Seconds to install
Turn locking adjusters set to the I-beam width with no tools necessary.
Adjusts from both sides
The anchor can be conveniently adjusted from both sides for a secure fit.
Free-moving centered D-ring
The D-ring is centered on the anchor and moves vertically or horizontally with the worker.
Wide 4 to 18 inch range
Fits I-beams from 4 inches wide and adjusts up to 18 inch wide flanges.
SRL or lanyard ready
Use a self-retracting lifeline or a shock-absorbing lanyard on the alloy steel D-ring.
Technical Specifications
| SKU | ST18AV |
|---|---|
| Type | Fixed I-beam anchorage connector, removable and reusable |
| Orientation | Clamps onto a vertical or horizontal I-beam |
| Connection | Single user; centered D-ring with vertical and horizontal movement |
| Tensile strength | 5,000 lbs |
| Max capacity | 425 lbs |
| Flange width | 4 in to 18 in |
| Hex bar | Aluminum alloy |
| Jaws | Aluminum alloy |
| D-ring assembly | Alloy steel |
| Weight | 5 lbs |
| Standards | ANSI Z359.18; ANSI Z359.7; OSHA 1926 Subpart M; OSHA 1910.140 (as listed on the spec sheet) |
The beam carries the load. The I-beam must be verified by a qualified person for the intended fall protection load, and the turn locking adjusters must be set snug to the actual flange before each use. One worker per anchor at 425 lbs maximum - calculate fall clearance, including swing fall when anchored to a vertical member, before tying off.
Compliance Standards
ANSI Z359.18
American National Standards Institute standard for anchorage connectors.
ANSI Z359.7
Qualification and verification testing of fall protection products.
OSHA 29 CFR 1926 Subpart M
Construction fall protection provisions listed on the Frontline spec sheet.
OSHA 29 CFR 1910.140
General industry personal fall protection system requirements for maintenance and facility work.
Typical Applications
Installation Overview
Follow the manufacturer's manual. The sequence below is an overview only.
- Inspect. Check the hex bar, jaws, turn locking adjusters, D-ring, and markings before each use.
- Verify the beam. Have a qualified person confirm the beam or column carries the intended fall protection load.
- Measure the flange. Confirm flange width is between 4 and 18 inches.
- Clamp. Seat the jaws over the flange and run the turn locking adjusters snug from both sides per the manual.
- Check the set. Confirm the anchor is captive on the flange and the adjusters are locked.
- Connect. Attach the SRL or shock-absorbing lanyard to the D-ring and verify fall clearance before work begins.
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.
- Jaws: deformation, cracks, or wear at the flange contact faces.
- Hex bar: bending, cracks, or damaged adjuster threads.
- Turn locking adjusters: binding, stripped threads, or failure to hold.
- D-ring assembly: bending, cracks, nicks, or restricted movement.
- Markings: missing or illegible product label.
Retire the anchor immediately after any fall arrest event, any deformation or crack, or any condition where it cannot be verified as safe for service.
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 ST18AV Submittals and Documentation
Frontline ST18AV Spec Sheet (PDF)Flange range, strengths, materials, and the compliance summary. Frontline ST18AV Test Report (PDF)Third-party test results documenting the rated performance. Frontline ST18AV User Manual (PDF)Clamping, adjustment, inspection, and retirement procedures.Compatible and Related Products
- Frontline ST-AH Aluminum I-Beam Slider Anchor. The sliding sibling - same aluminum build, glides along the flange with the worker.
- Frontline ST14V Fixed Beam Clamp. The zinc plated steel fixed clamp for 4 to 14 inch flanges.
- Frontline ST10HTK Aluminum Beam Trolley. The rolling trolley for long runs of overhead steel.
- Frontline RO4W Multifunction 4-Way Anchor. A multifunction anchor for concrete, metal, and wood substrates.
Need a Lightweight Fixed Beam Anchor?
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.
