COSR Concrete Embed Anchor Strap with D-Ring End, 11-Pack
The Frontline COSR is a cast-in-place concrete embed anchor strap - a quick, cost effective anchorage point set during the pour so crews on the cured deck above always have a tie-off within reach. It is built with a sewn textile loop at one end and an alloy steel D-ring at the other.
The strap is sewn from polyester webbing - a 2.16 in tubular layer over a 1.73 in flat layer with high-tenacity polyester thread - delivering a 5,000 lb webbing breaking strength and a 5,000 lb D-ring breaking strength, with a 310 lb user capacity. Per the spec sheet it conforms to ANSI Z359.18-2017 Type T and ANSI A10.32-2004 and aligns with OSHA 1926.502 and 1910.140. Offered in 4 ft and 6 ft lengths.
Who Needs This Product
This product is a cast-in-place anchorage connector - an embedded tie-off point for personal fall arrest or restraint on concrete construction. Concrete contractors and GCs plan the strap layout before each pour so formwork, framing, and finishing crews always have an anchor within reach. Each worker still needs a full body harness and a compatible connecting device.
Features
Cast-in-place simplicity
Install during the pour and the tie-off points are ready when the concrete is - no drilling, no hardware.
Looped and D-ring ends
A textile loop embeds in the structure; the alloy steel D-ring is the connection point.
Two-layer polyester webbing
A 2.16 in tubular sleeve over 1.73 in flat webbing, sewn with high-tenacity polyester thread.
Cost effective by the dozen
Priced so the whole perimeter can be anchored at every floor level.
5,000 lb webbing strength
Full anchorage-grade breaking strength from a strap that weighs about 0.75 lbs.
Two lengths
4 ft and 6 ft cover standard and deeper embed details.
Technical Specifications
| SKU | COS04R (4 ft) / COS06R (6 ft) |
|---|---|
| Type | Concrete embed anchor strap, looped one end / D-ring other end (cast-in-place anchorage connector) |
| Material | Polyester webbing (2.16 in tubular + 1.73 in flat), high-tenacity polyester thread |
| Webbing breaking strength | 5,000 lbs |
| D-ring | Alloy steel, golden yellow galvanized |
| D-ring breaking strength | 5,000 lbs |
| Max capacity | 310 lbs (one worker) |
| Lengths | 4 ft, 6 ft |
| Webbing width | 1.57 in |
| Strap weight | Approx. 0.75 lbs |
| Standards | ANSI Z359.18-2017 Type T; ANSI A10.32-2004; OSHA CFR 1926.502; OSHA CFR 1910.140 |
The embedment carries the load. The strap must be embedded in the concrete exactly as the Frontline manual specifies - placement, embedment depth, and concrete strength all matter, and the installation must be verified by a qualified person before anyone ties off. One worker per strap at 310 lbs maximum.
Compliance Standards
ANSI Z359.18-2017 Type T
American National Standard for anchorage connectors; Type T covers single-point anchorage connectors of this class. Third-party test report linked in Submittals.
ANSI A10.32-2004
Fall protection requirements for construction and demolition operations.
OSHA 29 CFR 1926.502
Federal construction fall protection criteria, including anchorage strength requirements.
OSHA 29 CFR 1910.140
General industry personal fall protection system requirements.
Typical Applications
How to Install the COSR
Follow the manufacturer's manual. The sequence below is an overview only.
- Plan. Lay out strap locations at the perimeter and work areas before the pour, per the engineer and the Frontline manual.
- Inspect. Check each strap for cuts, abrasion, and stitching damage before placement.
- Embed. Install the embedded looped end in the formwork or around reinforcement exactly as the manual specifies.
- Pour. Place the concrete, keeping the exposed D-ring clean and protected above the finished surface.
- Verify. After cure, have a qualified person verify the installation before any tie-off.
- Connect. Attach the connecting device to the exposed 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.
- Webbing: cuts, fraying, abrasion, burns, or chemical damage on the exposed loop or end.
- Stitching: broken, pulled, or abraded threads at the sewn terminations.
- D-ring (COSR): deformation, cracks, corrosion, or wear at the webbing interface.
- UV and contamination: fading, stiffness, or concrete slurry that has hardened the webbing.
- Embedment: cracking or spalling of the concrete around the strap exit point.
Embed straps are not removable or reusable once cast. Retire the tie-off point immediately after any fall arrest event or any webbing, stitching, or D-ring damage - cut the exposed end so it cannot be used and establish a new anchor.
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 COSR Submittals and Documentation
Frontline COSR Spec Sheet (PDF)Webbing strength, materials, and standards for the 4 ft and 6 ft straps. Frontline COS User Manual (PDF)Embedment requirements, installation, inspection, and retirement procedures. Frontline COS06R Test Report (PDF)Third-party test results documenting the rated performance of the COS strap family. Frontline Catalog (PDF)The full Frontline Fall Protection product catalog.Compatible and Related Products
- Frontline COSL Concrete Embed Strap, Looped. The looped-both-ends version of the same embed strap.
- Frontline COS04L Concrete Embed Strap, 4 ft. The fixed-length 4 ft looped embed strap.
- Frontline GUC2X4 Slab Grabber Guardrail. Non-penetrating guardrail for concrete slab edges.
Planning Tie-Off Points Before the Pour?
Need help specifying anchors and guardrail for your concrete 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.
