Post balusters are heavier, larger-section vertical members that anchor railing systems. They are placed at the top and bottom of a stair run, at corners, and at intervals along a long railing span to provide structural support and define the framework. Standard balusters are the lighter infill members between posts.
Railing posts are typically set in concrete footings for exterior fence applications, welded to a base plate that is lag-bolted to the structure, or drilled and pinned to a concrete or masonry surface with epoxy anchors. For deck or stair applications, posts are usually through-bolted to the rim joist or stringer with a minimum of two half-inch bolts and washers, ensuring they can resist the lateral loads required by code.
Yes, the heavier post baluster sections are well suited for use as line posts and corner posts in ornamental iron fence systems. Select a size appropriate for your span and the lateral loads expected. Fence posts are typically set in concrete with the bottom painted or galvanized to resist ground contact corrosion.