Worth it for contractors who need complete field drilling flexibility. The 50-inch aluminum brace can be cut to any rail height and drilled to match custom cable arrays — solving the alignment headaches that pre-drilled options create on stairs or unique layouts. This undrilled design shines for intermediate support between structural posts spaced 6-8 feet apart, especially on stair runs where custom angles make pre-drilled braces useless.
The brace helps maintain 3-4 inch cable spacing to meet IRC/IBC 4-inch sphere rule requirements — essential for passing code inspection. Works with RailFX cable railing systems, wood or metal posts, and accepts both 1/8” or 3/16” cable. Aluminum structure carries a Limited Lifetime Warranty, with 10-year coverage on hardware and cables.
Field Customization and Code Compliance
The undrilled 5/8” x 5/8” square aluminum tube gives contractors total control over cable placement. Cut the 50-inch length down to match any rail height, then drill holes exactly where needed for the specific cable array. This flexibility matters most on stairs where pre-drilled options rarely align with the actual cable angles required.
Intermediate support every 3 feet prevents cable deflection on longer runs between structural posts. Without these braces, cables sag on 6-8 foot post spans — creating both a code violation and a sloppy-looking railing. The braces maintain that critical 3-4 inch spacing between cables to satisfy the IRC/IBC 4-inch sphere rule.
| Specification | Value |
|---|---|
| Dimensions | 5/8” x 5/8” square tube |
| Length | 50 inches (cut to size) |
| Material | Aluminum |
| Finish | Silver powder-coat |
| Drilling | Undrilled (field drilling) |
| Cable Compatibility | 1/8” or 3/16” cable |
Installation Process and Material Performance
Installation follows a straightforward sequence: cut the brace to required height matching the distance between top and bottom rail, mark hole locations based on the cable array layout, drill holes using appropriate drill bits (slotted holes may be required for stairs), slide the brace onto cables during installation, then attach to top and bottom rail using the included floor plates and screws.
Installers report that careful drilling — ideally with a drill press — ensures clean, aligned holes. The undrilled design trades installation time for complete flexibility. Pre-drilled aluminum braces save time during installation with standard 3-1/8” spacing, but lack flexibility for stairs or custom cable arrays.
The silver powder-coat finish provides durability in Montana’s temperature swings and UV exposure. Aluminum construction resists the corrosion that eats steel components during freeze-thaw cycles. Stainless steel braces offer higher corrosion resistance in extreme coastal environments but cost more — unnecessary expense for Montana’s dry climate.
The included items list shows: 1 aluminum cable brace (50”), 2 level floor plates, and mounting screws. Everything needed for attachment comes in the package.
Frequently Asked Questions
Q: Can these braces work with non-RailFX cable systems?
The braces work with most top and bottom rail profiles beyond just RailFX systems. They’re compatible with wood or metal posts and accept standard 1/8” or 3/16” cable sizes.
Q: Why choose undrilled over pre-drilled braces?
Undrilled braces excel on stairs where custom angles are required and pre-drilled options won’t align. Pre-drilled versions save time on level runs with standard 3-1/8” spacing but can’t adapt to unique layouts.
Q: What’s the actual warranty coverage?
The aluminum structure itself carries a Limited Lifetime Warranty. Hardware and cables get 10-year limited coverage, with labor covered under a 4-year prorated limited warranty.
Q: How often should braces be placed?
Design for intermediate support every 3 feet between structural posts. This spacing minimizes cable deflection on typical 6-8 foot post spans.
Q: Do the braces meet building codes?
Yes — they’re IRC (International Residential Code) and IBC (International Building Code) compliant when installed according to local codes. The braces help maintain cable tension and spacing to meet the 4-inch sphere rule.
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