RailFX’s aluminum cable braces solve the critical spacing problem between posts while maintaining code compliance and preserving views. The RFXCB-3.125-42-SI-AL-12-FLP features 12 pre-drilled holes at exactly 3-1/8 inches on-center — the precise spacing that ensures automatic code compliance with the 4-inch sphere rule. Designed for posts spaced 6-8 feet apart rather than the standard 4 feet, these braces eliminate the need for additional structural posts.
Pre-Drilled Precision and Code Compliance
The 3.125-inch on-center hole spacing isn’t arbitrary — it’s engineered to meet IBC (International Building Code) and IRC (International Residential Code) requirements for cable spacing. When cables are properly tensioned through these pre-drilled holes, they automatically maintain the required spacing that prevents a 4-inch sphere from passing through. No measuring. No marking. No drilling errors that fail inspection.
Compared to non-drilled braces that require field drilling, the pre-drilled design ensures precise spacing and code compliance without the risk of measurement mistakes. This matters most on residential and commercial deck, balcony, porch, and indoor railing installations where inspectors check every detail.
| Specification | Value |
|---|---|
| Part Number | RFXCB-3.125-42-SI-AL-12-FLP |
| Material | Anodized Aluminum |
| Finish | Silver (SI) |
| Length | 42 inches (trimmable/cut-to-size) |
| Cross Section | 5/8 inch x 5/8 inch square tube |
| Hole Count | 12 |
| Hole Spacing | 3-1/8 inches (3.125 inches) on-center |
| Application Type | Level Runs |
Adjustable Length Design
The 42-inch length accommodates both 36-inch and 42-inch rail heights — trim to match specific railing heights as needed. Cut these braces using a standard miter saw with a non-ferrous metal blade. No special tools. No ordering multiple lengths for different rail heights.
The 5/8 inch x 5/8 inch square aluminum tube provides the structural support needed to prevent cable deflection while maintaining a sleek profile. This lightweight aluminum construction makes it easier to handle on-site compared to stainless steel alternatives, especially on remote Montana job sites where every pound matters.
Installation and Compatibility
The kit includes two level floor plates (FLP) for top and bottom rail or deck surface attachment. Simply align the pre-drilled holes with cable mounting hardware on the posts before installing. Compatible with various post materials including wood, composite sleeves, and aluminum, these braces are specifically designed for RailFX cable railing systems.
The system works with standard RailFX cable and hardware including brackets and locks. This makes these braces more cost-effective than installing additional structural posts while achieving the same code compliance.
Warranty Coverage
RailFX backs these aluminum components with a Limited Lifetime Warranty. The anodized finish carries a 10-year limited warranty against cracking, chipping, blistering, or peeling — coverage that matters at Montana elevations where UV exposure accelerates material breakdown. A 4-year prorated limited labor warranty claim is available with registration.
The warranty requires installation according to proper instructions and becomes null and void if the product is altered beyond intended trimming. Standard trimming to match rail height doesn’t affect coverage.
FAQ
Can these braces handle Montana’s temperature extremes? The anodized aluminum construction provides corrosion resistance, and the finish warranty specifically covers cracking and peeling for 10 years — protection against the freeze-thaw cycles that destroy lesser materials.
What’s the actual post spacing these allow? These braces are designed for posts spaced 6-8 feet apart, compared to the standard 4-foot spacing without intermediate supports. They prevent cable deflection between structural posts while maintaining the required cable tension for code compliance.
Do I need special tools to cut these to length? A standard miter saw with a non-ferrous metal blade handles the cutting. The 42-inch length can be trimmed to match specific railing heights — no need to order exact lengths.
Are these compatible with other cable railing brands? These braces are specifically designed for RailFX cable railing systems. They work with standard RailFX cable and hardware including brackets and locks. Using them with other systems may void the warranty and compromise the engineered spacing.
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