How Do I Install Cable Railing?

Install cable railing with the right tools, code basics, post layout, handrail setup, and cable tensioning steps.

Cable railing is one of the most DIY-friendly railing systems when the layout is clear and the posts are installed correctly. This guide walks through the full cable install path, from prep and code checks to final tensioning.

Cable railing uses the same basic structure as rod railing: posts, handrail, and horizontal infill. The difference is in the infill itself. Cable arrives on spools, uses crimped fittings, and needs careful tensioning.

If you are installing rod infill instead, use How Do I Install Rod Railing?.

What this guide covers

• Prep and code — what to verify before you drill.
• System choice — when to use Express, Signature, or DriveTite.
• Install sequence — posts, handrail, cable runs, and final tensioning.

Before You Start

Gather Your Tools

For most cable railing installs, you need:

• Power drill or impact driver
• Tape measure, speed square, and level
• Pencil
• Cable cutter and cable crimper
• Allen wrench for tensioning

Viewrail also offers cable installation kits with the specialized tools required for cutting, crimping, and tensioning.

Sketch the Space

Make a simple sketch of each level run or stair run before you order. Note the length of each run, the stair angle if applicable, and your planned guard or handrail height. Photos help too.

Step 1: Confirm Code Requirements

Before you install anything, confirm your local railing code.

Key requirements to verify:

• Guard height — usually at least 36 inches on level runs, though some jurisdictions require 42 inches.
• Handrail height — typically 34 to 38 inches above the stair nosings.
• 4-inch sphere rule — infill spacing must prevent a 4-inch sphere from passing through.
• Load requirements — the top rail and handrail must handle required structural loads.

Viewrail spaces cable runs at 3⅛ inches on center when installed correctly. Always confirm local requirements before ordering.

Step 2: Choose Your Cable System

Viewrail offers three main cable install paths.

• Express — ready-to-ship metal posts, metal handrail, and cable infill for straightforward DIY projects.
• Signature — a fully custom cable system for larger, more complex, or coastal projects.
• DriveTite — cable infill hardware for new or existing wood posts when you want to keep the wood structure. For the wood-post-specific process, use How do I Install DriveTite Cable Railing?.

If you need coastal-grade materials, Signature is the right path.

Step 3: Measure and Order

You need:

• The length of each level run
• The total length and angle of each stair run
• Your mounting surface type
• The number of cable runs based on railing height

A 36-inch system usually needs 10 cable runs. A 39-inch system usually needs 11. A 42-inch system usually needs 12.

Express handrail ships in 8.5-foot lengths and can be cut on site.

Step 4: Install the Posts

Keep posts at no more than 4 feet on center. This limits cable deflection and supports the handrail.

Common mounting styles include:

• Surface mount for standard deck and landing surfaces
• Side mount when you want to preserve deck space
• Concrete mount for concrete or other non-wood surfaces

Place the posts first. Check alignment with a string line before drilling. Then mark, pre-drill, and fasten each post securely.

Step 5: Attach the Handrail

Once the posts are secure, install the handrail brackets and fasten the handrail in place.

Metal handrail may need to be cut on site. Stair brackets pivot to match the stair angle. Corner brackets handle turns cleanly.

Step 6: Install and Tension the Cable

1

Thread the cable

Run 5/32-inch cable from one terminal post through each intermediate post to the end post.

2

Crimp the fittings

Crimp the terminal fittings onto each cable end at the end posts.

3

Pre-tighten each run

Hand-tighten each cable run first to remove slack before final tensioning.

4

Tension in sequence

Use an Allen wrench to tension the middle run first. Then work outward, alternating above and below, until all runs are taut and consistent.

Proper tension matters for both appearance and code compliance. Under-tensioned cable can deflect too far. Over-tensioned cable can bow the top rail.

Step 7: Final Check and Maintenance

Before you finish, confirm:

• All posts are plumb and secure
• Cable tension is even across all runs
• The handrail is attached firmly and sits at the right height
• All covers, end caps, and hardware are in place

For exterior systems, clean the railing 3 to 4 times per year. Check cable tension periodically and re-tighten as needed.

Related topics

• How do I Install DriveTite Cable Railing? — Use the dedicated install guide for wood-post cable railing.
• How Do I Maintain Cable Railing? — Keep cable clean, tensioned, and protected.
• Choose Your Cable System — Compare Express and Signature before you order.
• What Cable Railing Post Mounting Styles Are There? — Match the post mount to your surface.