Bradbury makes roll former lines that form bottom bars – typically produced from .030" to .036" steel and used to hold the flexible weather seal on the bottom garage door section where it contacts the floor. They can be manufactured with one or two grooves, depending on your style of weather seal. Punched holes along the bottom bar bracket are common for attachment to the door section. Bradbury bottom bar lines typically incorporate the insertion of the weather seal directly into the roll formed bottom bar completing the assembly for packaging.