Simply the lowest horizontal (cross) rail on any fence panel or gate.  

A surface mount configuration whereby the post is centered, then welded onto the bottom of a post.  

A term we use to describe the spacing that is between the bottom of your fence panel and/or gates….and the ground. Clearance is important for

An existing vertical structure, typically made out of brick or stone, in which you plan to connect a fence panel or gate in lieu of

Similar to an in ground application, this term refers to drilling into an existing hard surface like cement for post installation.