Aluminum Post – Hole Drilling Guidelines for Fittings
To use this chart you will need to find know the cable size, the fitting type, and the post type.
We recommend drilling holes 3″ on center, and setting posts no more than 5′ on center to assure compliance with building codes, as well as handling the load / pull-out limits of our system’s fittings. Our pre-drilled posts meet those specifications.
We sell both drilled and un-drilled aluminum posts. If there are angles, you need to install on a slope, or maybe you need more or fewer cables than come custom drilled, then you may need to order un-drilled posts, drill holes in them to meet your needs.
This chart is designed to assure you are drilling the smallest hole needed for our factory / field swaged tensioning / terminal fittings and cable.
We sell both 1/8″ cable and 3/16″ cable, and therefore this guide refers only to those sizes. If you need guidance with other fittings we carry, or cable sizes we don’t carry, feel free to give us a call. We’re here to help. 855-820-8439
All of our systems are designed to meet international building code, written by the International Code Council. They set the minimum standard for building codes worldwide, and recommend a cable deflection of no more than 4 inches for cable rails. Translated, that means that if you install cable rails, they must not be able to be pulled apart more than 4″.
Municipal localities can, and do make modifications to this. Your state, county, and even city, may have their own amendments to these codes.
People oftentimes say they live in rural areas and therefore are not required to meet building codes. This is simply untrue. If you live in a rural area you likely have both state and county codes that you are required to abide by.
Failure to comply with proper building codes can result in fines, loss of revenue when selling your home, and sometimes even the need to remove the non-compliant structure, so please, check with your local building department before beginning your project.