A locking bar clamps the post sleeve to the top rail when the locking bolt is tightened. The sleeve is held in the post by two set screws. The bottom rail is retained within a hole bored through the post and locked from rotation with a tapered drive pin at one end. The bottom rail can be single lengths between the posts or a continuous rail through two or more posts. The pull in vinyl glazing is installed on one side of the top and bottom rails prior to assembly. The roll in vinyl glazing is rolled into place after the glass panels are set.