Product Description
Ironwood® Post Base Twin Rail Saddles by OZCO® OWT — Connect (2) 2×4 Rails to 4×4 or 6×6 Posts
- Two Rails, One Base — Integrated post base with twin 2×4 rail saddles for clean, symmetrical top-rail connections
- Inline or Corner — Mount rails straight through or at 90° to create in-line posts or true corners with the same hardware
- Field-Friendly Fastening — Hex Cap Nuts use a 3/8″ driver; rail screws use a T25 Torx bit for fast, consistent installs
- Outdoor-Ready — 3/16″ hot-dip galvanized steel with black exterior powder coat; approved for ACQ-treated lumber
- Matches Ironwood Style — Decorative hardware and geometry coordinate with the full Ironwood OWT line
Connect your 2 x 4 wood railing rails with style and durability using the OZCO Post Base Twin Rail Saddle. This combination heavy-duty post base and two rail saddles gives you another great mounting solution for all of your outdoor wood projects. These Post Bases are designed to fit either 4 x 4 or 6 x 6 wood posts, and they are adjustable to allow for dimensional lumber tolerances. Two of the base plates have integrated rail saddles that can be used to create an inline rail or a 90-degree corner rail depending on where you place them. OZCO Rail Saddles are engineered with the correct railing placement to meet building codes.
These Ironwood Style Post Base Kits w/ Twin Rail Saddles have the rugged industrial look of cast iron, combined with the clean, modern lines of precision manufacturing.
Made from hot-dip galvanized steel with an exterior grade powder coat that will keep them looking great for many years. OWT Hardware is built outdoor tough, but it can also be used indoors for any project.
Each Post Base with Rail Saddles Kit comes with:
- 1 - Base Plate
- 2 - Rail Saddle Plates
- 2 - Standard Plates
- 6 - Hex Cap Nuts
- 6 - 1-3/4" OWT Timber Screws
- 12 - #12 x 1-1/4" Torx HD
Post Base Kits do not come with surface attachment hardware. Choose the correct hardware depending on the surface material that you are attaching to.
Why Choose This
- Speed + consistency — Pre-set geometry and included hardware minimize layout time and driver swaps
- Durability — Heavy-gauge steel, hot-dip galvanizing, and powder coat for long service life outdoors
- System look — Seamlessly pairs with Ironwood posts, beam hardware, and accents
Specifications
| Model / Item # | 4″×4″ — 51730 (4×4-TRS-IW) | 6″×6″ — 51772 (6×6-TRS-IW) |
| Typical Post Size | 4×4 wood post | 6×6 wood post |
| Rail Compatibility | Two nominal 2×4 rails (1-1/2″ × 3-1/2″) — inline or 90° corner | |
| Material / Finish | 3/16″ hot-dip galvanized steel with black powder coat; ACQ-approved | |
| Driver Sizes | 3/8″ hex (Hex Cap Nuts & OWT Timber Screws); T25 Torx (#12 rail screws) | |
| Included Hardware | (1) Base Plate; (2) Rail Saddle Plates; (2) Rail Saddles; (2) Standard Plates; (6) Hex Cap Nuts; (6) OWT Timber Screws 1-3/4″; (12) #12 × 1-1/4″ Torx HD (T25) | (1) Base Plate; (2) Rail Saddle Plates; (2) Rail Saddles; (2) Standard Plates; (8) Hex Cap Nuts; (8) OWT Timber Screws 2-3/4″; (12) #12 × 1-1/4″ Torx HD (T25) |
| Approx. Dimensions (packaged) | 8.38″ × 7.25″ × 4.63″ | 9.00″ × 8.25″ × 4.75″ |
| Approx. Weight | ~5.0 lb per kit | ~10.5 lb per kit |
| Typical Usage | Deck & porch guardrails, decorative rail sections, and similar wood-to-post connections | |
Installation
Set and plumb the post, then mount the Post Base to the surface per the project plan. Install the twin rail saddles (inline or corner), seat the 2×4 rails, and drive the included fasteners — 3/8″ hex driver for Hex Cap Nuts/Timber Screws and T25 for the #12 rail screws. Always fasten into sound lumber and follow local code for guard height, spacing, and loads.
Resources: Twin Rail Saddle — Installation Instructions (PDF) | Manufacturer’s Warranty
Buying Guide
- Choose your post size: Select 51730 for 4×4 posts or 51772 for 6×6 posts.
- Coordinate hardware: Keep extra OWT 1/4″ Timber Screws on hand for adjacent connections.
- Alternate look: Prefer the other OWT style? See Laredo Sunset Post Base Twin Rail Saddles for the same function with LS aesthetics.
Frequently Asked Questions
- Can this bracket form both straight runs and corners?
- Yes. The twin rail saddles support in-line rail connections or a 90° corner on the same post.
- What drivers do I need?
- A 3/8″ hex driver for Hex Cap Nuts and Timber Screws, and a T25 Torx bit for the #12 rail screws.
- Is it compatible with pressure-treated lumber?
- Yes. The hot-dip galvanized, powder-coated steel is approved for use with ACQ-treated materials.
- What rail size does it accept?
- Two nominal 2×4 rails (approx. 1-1/2″ × 3-1/2″) per post base assembly.
Comparison
- Post Base Twin Rail (this item): Anchors post and captures two 2×4 rails for in-line or corner layouts.
- Post Base Single Rail: Same concept but for one 2×4 rail — ideal for ends or transitions.
- 2×4 Top Rail Saddle: Attaches a single top rail directly to a post when a base plate isn’t required at that location.
Planning a full rail package and want everything to match? Contact us and we’ll help you kit posts, saddles, screws, and accents for a clean, code-conscious build.
