COB345K Reusable 5K Concrete Anchor Bolt
The COB345K is Frontline's most popular anchor for concrete applications - a portable, reusable anchor bolt that installs in a matter of seconds. Drill a 3/4 inch hole, insert the bolt, and the stainless steel mechanism locks into the concrete to create an immediate 5,000 lbf anchorage connector. When the work moves, the anchor removes just as fast and reinstalls at the next tie-off point.
At 11.5 inches long and a featherweight 0.4 lbs, the COB345K works on vertical or horizontal applications wherever the hole placement meets the edge distance requirements. It carries a 1,000 lb working load and a 310 lb user capacity, and conforms to ANSI Z359.7-2011 and ANSI Z359.18 with OSHA 1926.502, OSHA 1910.140, and EN 795 alignment.
Who Needs This Product
This product is a reusable anchorage connector - the anchor point of a personal fall arrest system on concrete. Concrete crews, GCs, and maintenance teams drop it into a drilled hole wherever a tie-off is needed, then pull it and move to the next location. Each worker still needs a full body harness and a compatible connecting device attached to the anchor eye.
Features
Seconds to install
Once the 3/4 inch hole is drilled, the anchor bolt sets in a matter of seconds - no adhesives, no cure time.
Fully removable and reusable
Pull the anchor when the work moves and reinstall it at the next location, job after job.
1,000 lb working load
Rated working load on top of the 5,000 lbf tensile strength for everyday duty.
Vertical or horizontal
Works in walls, decks, and soffits wherever hole placement meets the manual requirements.
Corrosion resistant build
Stainless steel with zinc plated steel, polyurethane, aluminum, and aircraft cable components.
Featherweight
At 0.4 lbs and 11.5 inches, a pouch of anchors goes anywhere the crew goes.
Technical Specifications
| SKU | COB345K |
|---|---|
| Type | Reusable concrete anchor bolt (removable anchorage connector) |
| Material | Stainless steel, zinc plated steel, polyurethane, aluminum, aircraft cable |
| Tensile strength | 5,000 lbf / 22 kN |
| Working load | 1,000 lbs / 454 kg |
| Max user weight | 310 lbs / 140 kg (one worker) |
| Length | 11.5 in (293 mm) |
| Hole requirement | 3/4 in (20 mm) diameter; 6 in min edge distance with 12 in thick concrete, or 12 in edge distance with 5 in thick concrete |
| Anchor weight | 0.4 lbs (product page) |
| Application | Concrete, vertical or horizontal, removable and reusable |
| Standards | ANSI Z359.7-2011; ANSI Z359.18; OSHA CFR 1926.502; OSHA CFR 1910.140; EN 795 |
The concrete carries the load. The concrete substrate must be verified by a qualified person for the intended fall protection load before use, and the hole must meet the manual requirements - 6 inches minimum from an edge in 12 inch thick concrete, or 12 inches from an edge in 5 inch thick concrete. One worker per anchor at 310 lbs maximum.
Compliance Standards
ANSI Z359.7-2011
Qualification and verification testing of fall protection products by accredited third-party laboratories.
ANSI Z359.18
American National Standard for anchorage connectors used in active fall protection systems.
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 for maintenance and facility work.
EN 795
European standard for personal fall protection anchor devices.
Typical Applications
Installation Overview
Follow the manufacturer's manual. The sequence below is an overview only.
- Inspect. Check the cable, locking mechanism, eye, and label before each installation.
- Verify structure. Have a qualified person confirm the concrete carries the intended fall protection load.
- Drill. Drill a 3/4 inch diameter hole to the manual depth at the required edge distance, and clean it out.
- Insert. Insert the anchor bolt and set it per the manual - installation takes a matter of seconds.
- Verify. Confirm the anchor is fully seated and locked per the manual before loading.
- Connect. Attach the connecting device to the anchor eye 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.
- Aircraft cable: broken wires, kinks, birdcaging, or corrosion.
- Locking mechanism: deformation, cracks, wear, or debris that prevents full engagement.
- Anchor eye: bending, nicks, gouges, or wear at the connection point.
- Polyurethane and aluminum components: cracking, deformation, or corrosion.
- Markings: missing or illegible product label.
Retire the anchor immediately after any fall arrest event, any deformation, cable damage, 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 COB345K Submittals and Documentation
Frontline COB345K Spec Sheet (PDF)Strengths, materials, dimensions, and the compliance summary. Frontline COB345K User Manual (PDF)Hole requirements, installation, removal, inspection, and retirement for the COB345K family. Frontline COB345K Test Report (PDF)Third-party test results documenting the rated performance.Compatible and Related Products
- Frontline COB345KSV Reusable 5K Anchor Bolt with Swivel D-Ring. The same reusable bolt platform with a swiveling D-ring connection point.
- Frontline COB110K Reusable 10K Concrete Anchor Bolt. The 10,000 lbf big brother for applications that demand a higher rated anchor.
- Frontline COT345K Reusable 5K Toggle Bolt Anchor. The toggle bolt version for hollow-core concrete and steel flange.
Need a Reusable Tie-Off on Concrete?
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.
