RC-BKRPLT Concrete Anchor Backer Plate
The RC-BKRPLT is the structural backer plate companion for Frontline RC concrete roof anchor posts. Engineered for through-bolt (sandwich) mounting, the plate installs on the opposite side of the structure from the anchor and works in combination with threaded rod assemblies to clamp the installation tight - reliable performance as part of a complete personal fall arrest system installation.
Cut from ASTM A36 steel at 11 x 11 inches and 0.35 inches thick, then hot dip galvanized for corrosion protection, the plate matches the footprint of the RC anchor base. Frontline designates it as an accessory compatible with the RC post concrete anchors and designed for installation over steel beams. Mounting hardware is not included - the installation requires six 1/2 inch ASTM A307 threaded rods with nuts and lock washers.
Who Needs This Product
This product is a structural backing component, not a standalone anchor. Installers and engineers specify it whenever an RC roof anchor post is through-bolted rather than anchored into the concrete mass - the plate spreads the clamping load on the far side of the structure. The RC post, threaded rod hardware, harness, and connecting device complete the system.
Features
Through-bolt (sandwich) mounting
Backs the RC anchor from the opposite side of the structure, clamped by threaded rod assemblies.
ASTM A36 steel
A full 0.35 inch thick structural plate sized at 11 x 11 inches to match the RC anchor base.
Hot dip galvanized
Corrosion protection that matches the RC posts for long service indoors or out.
RC series companion
Frontline designates the plate as the accessory for its RC post concrete anchors.
Steel beam installations
Designed for through-bolt installation over steel beams per the Frontline documentation.
Hardware not included
Specify six 1/2 inch ASTM A307 threaded rods with nuts and lock washers to suit the structure depth.
Technical Specifications
| SKU | RC-BKRPLT |
|---|---|
| Type | Backer plate for RC concrete roof anchor posts (structural component) |
| Material | ASTM A36 steel, hot dip galvanized |
| Dimensions | 11 in x 11 in x 0.35 in thick |
| Min anchorage strength | 5,000 lbf / 22.2 kN (installed system requirement) |
| Required hardware | (6) 1/2 in ASTM A307 threaded rods, nuts, and lock washers - not included |
| Shipping weight | Approx. 12 lbs |
| Application | Through-bolt (sandwich) backing for RC anchors on concrete structures and steel beam installations |
| Compatibility | Frontline RC12 / RC18 / RC24 anchor posts |
Hardware is not included. The RC-BKRPLT ships as the plate only - the installation requires six 1/2 inch ASTM A307 threaded rods with nuts and lock washers, sourced to the structure thickness. The complete through-bolt assembly must be designed and verified by a qualified person for the intended fall protection load before use.
Compliance Standards
Structural component
The RC-BKRPLT spec sheet lists no standalone compliance standards - it is a backing plate that performs as part of a complete RC anchor installation rather than an anchorage connector on its own.
Qualified person review
As with any anchorage installation, the complete through-bolted assembly - anchor, plate, rods, and structure - must be evaluated and approved by a qualified person before workers tie off.
Typical Applications
Installation Overview
Follow the manufacturer's manual. The sequence below is an overview only.
- Inspect. Check the plate for deformation, cracks, and finish damage before installation.
- Verify structure. Have a qualified person design the through-bolt assembly and confirm the structure carries the intended load.
- Source hardware. Obtain six 1/2 inch ASTM A307 threaded rods with nuts and lock washers sized to the structure depth - they are not included.
- Position. Align the backer plate with the RC anchor base on the opposite side of the structure.
- Clamp and torque. Install the rod assemblies and torque to the specification in the Frontline manual.
- Verify. Confirm the completed installation with the qualified person before any tie-off.
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.
- Plate: bending, cracks, gouges, or deformation.
- Galvanized finish: corrosion or damage that exposes bare steel.
- Rod assemblies: corrosion, thread damage, or loss of torque.
- Bearing surfaces: crushing or movement at the structure interface.
- Alignment: the plate remains centered behind the RC anchor base.
Remove the plate from service after any fall arrest event on the anchor it backs, any deformation or crack, or any condition where the installation cannot be verified as safe by a qualified person.
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Frequently Asked Questions
Frontline RC-BKRPLT Submittals and Documentation
Frontline RC-BKRPLT Spec Sheet (PDF)Plate material, dimensions, and required hardware. Frontline RO/RW/RC User Manual (PDF)Installation, fastening, inspection, and retirement for the Frontline roof anchor family.Compatible and Related Products
- Frontline RC Concrete Roof Anchor Post. The 12, 18, and 24 inch anchor posts this plate backs.
- Frontline RO-CAL Commercial Roof Anchor. The CAL-OSHA compliant commercial roof anchor for wood and metal decks.
Through-Bolting an RC 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.
