Product Description
OZCO® OWT™ Ironwood 8″ Post-to-Beam Coupler for Seams — 2-Pack (Black, 3/16″ Steel)
- Splice Over a Post — Purpose-built to couple two beams in-line at a non-terminal post (“seam” connection)
- “Third-Hand” Ledge — Integrated post ledge supports the members while you align, mark, and fasten
- Through-Bolt Capacity — Top holes are designed for OWT Timber Bolts (required; sold separately) for strong clamping
- Outdoor-Ready — Heavy 3/16″ pre-galvanized steel with black exterior powder coat; ACQ-compatible
- Ironwood Style — Clean, angular OWT Ironwood look coordinates with matching brackets and accents
The Ironwood 8″ Post-to-Beam Coupler simplifies splicing two beam segments over a post. Set both beam ends on the coupler’s ledge, position the cover plates, and through-bolt the top holes with OWT Timber Bolts for a tight, repeatable seam. Built from 3/16″ galvanized steel with a durable black powder coat, the coupler is a favorite for pergolas, pavilions, porch roofs, and long runs where beam lengths must be joined cleanly at intermediate posts.
Why Choose This
- Cleaner seams — Purpose-made hardware that aligns and clamps beam ends at a post
- Faster installs — The ledge supports the members so one person can work more safely
- Built to last — Galvanized substrate + exterior powder coat for long outdoor service
Specifications
| Series / Style | Ironwood (OWT) — 8″ Post-to-Beam Coupler for Seams | |
| Item / Model | 51777 (P2B-SB-IW) | |
| Intended Use | Splice two beams inline over a post (non-terminal post “seam” connection) | |
| Material / Finish | 3/16″ pre-galvanized steel with black exterior-grade powder coat; ACQ-approved | |
| Kit Includes (per 2-pack) | (2) Post ledge bases; (2) Top cover plates; (4) 1-1/2″ Hex Cap Nuts; (4) 2-3/4″ OWT Timber Screws | |
| Fasteners Required (top holes) | OWT Timber Bolts (sold separately); do not use screws in top holes | |
| Typical Usage | Pergolas, pavilions, porch roofs, long beam runs, rafters | |
Installation
Dry-fit both beam ends at the post. Fasten the post ledge bases to the post, set the beam ends on the ledge, and place the top cover plates. Drill the top holes and install OWT Timber Bolts through the beam(s) and plate; use the included Timber Screws only in the designated lower placement hole. Tighten, check alignment, and repeat on the opposite face. Follow local code and project engineering for spans and loads.
Buying Guide
- Don’t forget bolts: Add OWT Timber Bolts for the top holes, and finish exposed faces with OWT Hex Cap Nuts.
- Pair for mixed joints: For non-seam post/beam joints on the same project, see Ironwood Post-to-Beam Bolt (Inline) or the Bolt (Offset).
Frequently Asked Questions
- Is this the right part for joining two beams end-to-end at a post?
- Yes. The coupler is specifically intended for inline “seam” connections at non-terminal posts.
- Do I have to use Timber Bolts?
- Yes for the top holes. Timber Bolts provide the required clamping; screws are not recommended in the top holes.
- Will it match my other Ironwood hardware?
- Yes. The geometry and black powder coat coordinate with the Ironwood OWT line.
- Can I use this at the very end of a beam run?
- It’s designed for seam splices at intermediate posts. For end/terminal joints, use a standard Post-to-Beam connector.
Comparison
- Ironwood 8″ Coupler (this item): Designed for seam splices over a post; requires Timber Bolts in top holes.
- Ironwood Post-to-Beam Bolt — Inline/Offset: Standard post/beam joints (not a seam); also through-bolted for higher clamping.
- Ironwood Post-to-Beam Flush: Alternate connector style for non-seam joints when a low-profile plate is preferred.
Have questions about mixing couplers and standard post-to-beam brackets on the same build? Contact us and we’ll help you plan the right combination of connectors and fasteners for a cohesive, code-conscious project.
