Tie Basics 

Here are some areas with basic information about the Engineered Wood Crosstie Industry.
 

Tie Guide

The Tie Guide ya esta disponible en español

Producing and Inspecting Railroad Crossties (2004)

Basic Tie Information:

RTA Specifications and a Visual Guide to Tie Defects

The RTA TieID Uniform Marking System for Crossties (2004)

Commonly Used Crosstie Species