Start with learning how to measure. This will help walk you through the ordering process. Once you know what installation method you will be using you can then download the PDF instructions for that method to save or print out for future reference.
Choosing The Right Length
How To Measure For A 3 Post Rail
How To Measure For A Wall Rail
Base Plate Rail With Anchor Bolts
Base Plate Rail With Lag Bolts
Core Drill Posts
How To Order