BlackRock Column Bridgeport prefabricated fireproof columns are designed to help you cut installation costs and minimize installation time. Our columns are delivered ready.... Availability BlackRock Column, Inc. maintains trucking facilities to service a network of structural steel fabricators, lumber, masonry and building supply outlets. Copyright Policy Powered by Transformyx 146 Davis Ave.Bridgeport, CT 06605800-270-5882 ... for erection and attachment to structural members. No trades other than the steel erector are needed. Bridgeport columns are fireproofed at the factory and do not require expensive field...

BlackRock Column Scope The specifications include the design, fabrication and erection of Bridgeport prefabricated, fire-proof building columns.Design Design, manufacture... and fabrication of Bridgeport prefabricated, fireproof building columns will be in accordance with Underwriters' Laboratories strict and rigid control.Minimum covering of fireproofing... will conform to ASTM.Concrete filling will attain a strength of 4200 p.s.i. mixed and mechanically vibrated to insure density voids.Concrete filling for tubular or pipe columns will attain...