Single-piece, 806-lb counterweight anchor that ships fully assembled. The Frontline CO2NN provides OSHA-compliant fall arrest or restraint for one worker on flat or low-slope commercial roofs — no fasteners, no roof penetrations, no risk to the membrane warranty. Twenty internal weights bolted into a single rigid frame deliver the dead weight, integrated EPDM rubber base fittings deliver the friction, and a 360° swiveling D-ring keeps the worker mobile through the work zone. ASTM A36 structural steel, hot-dipped galvanized finish on the anchor body, and electrostatic anti-corrosion paint on the weights. Compliant with OSHA 1910 and 1926, ANSI Z359.18, and EN 795:2012.
806lb Anchor Weight
310lb User Capacity
5° Max Roof Pitch
360° Swivel D-Ring
0 Roof Penetrations
What Sets the CO2NN Apart
Ships Fully Assembled — 806 lbs Unlike stacked-plate counterweight systems that require on-roof assembly, the CO2NN arrives as one rigid 806-lb unit ready to deploy. Twenty internal anchor weights (5 per level, 4 levels) are bolted into a steel frame at the factory. Hoist it up, position it, attach. No stacking, no sequencing, no missing plates.
360° Swiveling D-Ring The fall-arrest D-ring rotates a full 360 degrees, allowing the worker to move freely around the work zone without lifeline twists or entanglement. The D-ring sits on a vertical riser at the center of the anchor — clear of the lifting points and weight stack.
EPDM Base Fittings Internal EPDM rubber supports between the anchor and the roof surface generate the friction coefficient that resists sliding under load. The rubber buffer also protects finished roofing membranes from abrasion against the galvanized steel base.
Four Lifting Points + Ergonomic Handles Four removable picking points let you crane or forklift the anchor onto the roof. Once positioned, the picking points must be removed before use — they can interfere with the lifeline. Ergonomic carry handles on the anchor weights allow safe manual repositioning by trained crews.
ASTM A36 Structural Steel Anchor body, weight plates, and vertical risers are fabricated from ASTM A36 rated structural steel. The anchor frame is hot-dip galvanized for corrosion resistance; the weight plates are finished with electrostatically applied anti-corrosive paint. Built for repeated jobsite cycling in commercial and industrial environments.
Wide Service Temperature Range Rated for use from -30°F to +130°F (-34°C to +54°C), covering the full North American climate range from northern winter conditions to southern summer roofing work. The galvanized finish and EPDM components are spec'd for outdoor exposure across this full range.
Fall Arrest or Restraint — One Worker Approved for both personal fall arrest (PFA) and travel restraint applications. Connecting equipment must limit the maximum arresting force to 1,800 lbs and the free-fall distance to 6 ft, per OSHA 1926.502. Compatible with Frontline-approved snaphooks, carabiners, lanyards, SRLs, and lifelines.
Triple-Standard Compliance Tested to meet or exceed OSHA 1910 (General Industry), OSHA 1926 (Construction), ANSI Z359.18 (Anchorage Connectors), and EN 795:2012 (European fall protection anchor standard). Documentation references on file with the manufacturer.
What's Included — CO2NN Counterweight Anchor
The CO2NN ships as a single fully assembled unit with everything required for deployment. The owner's manual, spec sheet, and inspection log are available in the Submittal Documents section below.
1 Assembled Anchor 806-lb single unit, 39.5" × 13.25" × 39.5" footprint, 20 internal weights bolted into ASTM A36 steel frame.
1 360° Swivel D-Ring Vertical riser-mounted D-ring with full-rotation swivel for fall arrest or travel restraint connection.
4 Lifting Points Four removable picking points for crane or forklift hoisting. Must be removed before use of fall protection.
Technical Specifications
| Specification | Detail |
|---|---|
| Model | Frontline CO2NN Counterweight Anchor System |
| Application | Non-penetrating freestanding anchor — temporary use |
| Approved Use | Personal fall arrest (PFA) or travel restraint — one worker |
| User Maximum Capacity | 310 lbs (combined: body weight + clothing + tools + equipment) |
| Anchor Total Weight | ±806 lbs |
| Internal Weights | 20 anchor weights total — 5 per level, 4 levels |
| Dimensions (L × W × H) | 39.5" × 13.25" × 39.5" |
| Maximum Roof Pitch | 5° (low-slope and flat roofs) |
| Minimum Setback from Edge | 8 ft from the leading edge or fall hazard |
| D-Ring Attachment | 360° swiveling D-ring on vertical riser |
| Maximum Free Fall | 6 ft (1.8 m) per OSHA 1926.502 |
| Maximum Arresting Force | 1,800 lbs (connecting equipment limit) |
| Anchor Body Material | ASTM A36-rated structural steel |
| Anchor Body Finish | Hot-dipped galvanized |
| Weight Plate Finish | Electrostatic anti-corrosive paint coating |
| Friction Pads | EPDM rubber internal supports |
| Approved Substrates | Concrete, TPO, bitumen, asphalt |
| Required Substrate Capacity | 1,500 lbs minimum + user weight + equipment |
| Service Temperature Range | -30°F to +130°F (-34°C to +54°C) |
| Inspection Cadence | Pre-use (user) + every 6 months (Competent Person) |
| Compliance | OSHA 1910 / OSHA 1926 / ANSI Z359.18 / EN 795:2012 |
| Lifting Method | Crane or forklift via four removable picking points (under qualified person supervision) |
⚠ Before Deployment — Read This
The substrate must be verified to support a minimum of 1,500 lbs (plus the user, tools, and any other equipment loaded on the roof). Roof deck capacity is the responsibility of the user/employer or a qualified person. Frontline's anchor compliance covers the anchor only — it does not extend to the substrate.
The anchor must be placed on a clean, dry surface. Do not use on roofs contaminated with oil, grease, ice, snow, or loose debris — deadweight anchors rely on EPDM-to-substrate friction, and contamination compromises the friction coefficient. Do not use on slopes greater than 5°. The lifting points must be removed before the use of fall protection.
Compliance & Certification
✔ Compliant OSHA 1910.140 & 1926.502 Meets OSHA's anchorage and personal fall arrest system requirements for both general industry (1910) and construction (1926). Required for all US-regulated work at height.
✔ Compliant ANSI Z359.18 Designed to meet or exceed ANSI Z359.18 — the Anchorage Connectors for Active Fall Protection Systems standard. The applicable consensus standard for non-penetrating freestanding anchorage devices used in PFAS.
✔ Compliant EN 795:2012 Tested for compliance with EN 795:2012 — the European standard for personal fall protection anchor devices. Useful for projects with international specification requirements or buyers operating across both markets.
⚠ User Responsibility Substrate & PFAS Selection OSHA and ANSI compliance covers the anchor only. The user/employer is responsible for verifying that the roof substrate can support the load (1,500 lbs minimum + user + equipment) and that the connecting PFAS limits arresting force to 1,800 lbs and free fall to 6 ft. Substrate certification is the user's responsibility per OSHA 1926.502(d).
Frequently Asked Questions
Does the CO2NN require any assembly on the roof?
No. The CO2NN ships as a single fully assembled 806-lb unit. The 20 internal anchor weights (5 per level, 4 levels) are bolted into the steel frame at the factory. Unlike stacked-plate counterweight systems, there is no on-roof assembly, no plate sequencing, and no risk of an installer leaving weights off. Hoist it up, position it at least 8 ft from the leading edge, remove the lifting points, and connect.
How far must the anchor be placed from the roof edge?
The CO2NN must be positioned a minimum of 8 feet from the leading edge or any fall hazard, measured from the anchor base to the unprotected edge. The 8-ft setback is required by the manufacturer and allows the anchor to function properly as a fall restraint or fall-arrest point while accounting for displacement of the anchor during a fall. For fall-arrest applications, calculate the total fall clearance separately based on lanyard or SRL specifications, worker height, and D-ring shift. Plan your roof layout with this minimum in mind — a roof narrower than 16 feet (8 ft setback on each side) doesn't leave a usable work zone for this anchor.
What roof substrates is the CO2NN approved for?
The Frontline owner's manual lists four approved substrates: concrete, TPO, bitumen, and asphalt. The integrated EPDM base supports protecting the substrate from abrasion and provides the friction coefficient required for the anchor to perform as tested. The substrate must also independently support a minimum load of 1,500 lb (including the user, tools, and any other equipment) — verification of substrate capacity is the responsibility of the user or a qualified person. For substrates not on this list (other membrane types, metal decks, ballasted roofs), call us before ordering.
Is it safe to use an SRL with a freestanding counterweight anchor?
Yes. The CO2NN is compatible with self-retracting lifelines (SRLs), shock-absorbing lanyards, and horizontal/vertical lifelines, provided the connecting equipment limits the maximum fall arresting force to 1,800 lbs and free fall to 6 ft per OSHA 1926.502. Counterweight anchors may shift slightly during fall arrest as the system absorbs energy, so calculate total fall clearance distance with that displacement factored in. The SRL or lanyard manufacturer's user manual provides the specific clearance requirements for their device.
How often does the CO2NN require inspection?
Three inspection cadences apply: (1) Pre-use — visual inspection by the authorized user before every shift, checking the D-ring swivel, anchor frame, weight plates, fasteners, and labels. (2) Every 6 months — documented inspection by a Competent Person other than the regular user, per ANSI Z359.18 and the Frontline owner's manual. (Note: the manufacturer specifies 6-month intervals, more stringent than the 12-month interval common to other anchor types — do not default to annual.) (3) Post-fall — if the anchor is subjected to a fall arrest event or any impact, it must be removed from service immediately and inspected for structural damage or deformation. Inspection logs must be maintained per OSHA recordkeeping requirements.
What's the difference between fall arrest and fall restraint with this anchor?
Fall arrest uses the anchor to stop a worker after they fall — the lanyard or SRL deploys, the system limits the arresting force to 1,800 lbs, and the worker is suspended until rescue. The CO2NN is approved for this when paired with compatible PFAS components. Fall restraint uses the anchor to prevent the worker from reaching the fall hazard at all — the lanyard length physically prevents them from getting to the edge. Restraint is the safer configuration when the layout allows it because it eliminates the fall event entirely. The CO2NN is rated for both applications. Call us if you want help speccing the right approach for your roof.
What are the most common deployment mistakes with the CO2NN?
Five things to watch for: (1) Lifting points left attached — the four picking points must be removed before fall protection use. They can foul a lifeline or SRL during a fall event. (2) Wet, icy, or contaminated placement surface — deadweight anchors rely on EPDM-to-substrate friction. Oil, grease, ice, snow, gravel, or membrane debris under the base destroys the friction coefficient. Sweep and inspect before placement. (3) D-ring not facing the worker — the anchor is tested in all directions, but the proper configuration is with the D-ring facing the user so the lifeline runs straight and unobstructed. (4) Setback too short — placing the anchor closer than 8 feet from the leading edge defeats the manufacturer's design assumptions. Measure from the anchor base, not the D-ring. (5) Substrate capacity not verified — the roof deck must support 1,500 lbs plus the user. Confirm with the building owner, structural engineer, or qualified person before placement on questionable decks.
Frontline CO2NN Submittal Documents
The following manufacturer documents are available for download to support procurement, safety planning, jobsite submittals, and Competent Person inspection records. All documents apply directly to the Frontline CO2NN Counterweight Anchor System.
| Document | Description | Download |
|---|---|---|
| Frontline CO2NN Spec Sheet | Frontline CO2NN dimensions, materials, design specifications, and applicable standards. | Frontline CO2NN — Spec Sheet (PDF) |
| Frontline CO2NN Owner's Manual | Complete user instructions, including installation, application, inspection, maintenance, storage, transportation, and the inspection checklist and log. Rev. November 2024. | Frontline CO2NN — Owner's Manual (PDF) |
Building a complete fall protection system around the CO2NN? Pair this anchor with a Frontline 110CTB harness for the worker side of the connection, a self-retracting lanyard or shock-absorbing lanyard as the connecting device, or layer in non-penetrating guardrails for passive perimeter protection alongside the active anchor. Not sure what configuration applies to your roof? Call us — we spec the layout before you buy.
Questions before you order? We spec systems — not just products. Pre-sale support, configuration confirmation, freight quotes for multi-anchor orders — call or email directly.
863-703-4522
The limited warranty is provided only to an end-user customer for the period set forth in an order that has been accepted by Fall Protection Distributors, LLC. The end user customer must be: (a) a Buyer purchasing product directly from Fall Protection Distributors, LLC or Buyer of product purchasing from an authorized reseller. The limited warranty covers defects in materials and workmanship in the Standing Seam Roof Anchor product. The limited warranty does not cover problems resulting from external causes such as accident, abuse, misuse, or problems with electrical power, servicing not authorized by Fall Protection Distributors, LLC, usage that is not in accordance with product instructions, failure to follow the product instructions or failure to perform preventive maintenance, problems caused by using accessories, parts, or components not supplied by Fall Protection Distributors, LLC; normal wear and tear; and products with missing or altered service tags or serial numbers. FALL PROTECTION DISTRIBUTORS, LLC’S RESPONSIBILITY FOR MALFUNCTIONS AND DEFECTS IN PRODUCT IS LIMITED TO REPAIR AND REPLACEMENT OF THE PRODUCT AS SET FORTH IN THIS WARRANTY STATEMENT. EXCEPT AS PROVIDED ABOVE, FALL PROTECTION DISTRIBUTORS, LLC AND ITS SUPPLIERS MAKE NO, AND HEREBY DISCLAIM ALL OTHER, WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY OF NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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