Barrier cable is a vehicular or pedestrian restraint system used in parking garages. It installed along the ramps or around the perimeter of the parking structure. It consists of a 0.5-inch, 7-wire steel strand which is similar to the strand used in Post-tensioned concrete.

Galvanized

Galvanized barrier cable is the most prevalent type of barrier cable used today. The steel strand is Zinc plated to protect it from corrosion per ASTM A475.

Epoxy-Coated

Epoxy

Epoxy

Epoxy, also known as polyepoxide, is a thermosetting polymer formed from reaction of an epoxide "resin" with polyamine "hardener". Epoxy has a wide range of applications, including fiber-reinforced plastic materials and general purpose adhesives....

-coated barrier cable is used on occasion for aesthetic purposes. It is significantly more expensive than galvanized barrier cable.

Plastic-Coated

Plastic

Plastic

A plastic material is any of a wide range of synthetic or semi-synthetic organic solids used in the manufacture of industrial products. Plastics are typically polymers of high molecular mass, and may contain other substances to improve performance and/or reduce production costs...

-Coated is similar to the steel tendon used in Unbonded post-tensioned concrete. The only difference is that plastic-coated barrier cable does not have a layer of Post Tension coating ("grease") between the extruded HDPE plastic sheathing and the steel strand.

Anchorage

Depending on parking structure, the barrier cable is installed in rows of several cables. There are several anchorage and attachment systems to concrete or steel columns.

Specification

The design and installation of the barrier cable system is referenced in the Post-Tensioning Institute

Post-Tensioning Institute

The Post-Tensioning Institute is a non-profit organization for the advancement of post-tensioned, prestressed concrete design and construction. The Post-Tensioning Institute provides a variety of resources online for architects and engineers.-History:...

's Specification for Seven-Wire Steel Strand Barrier Cable Applications.

Benefits

7-wire Barrier Cable has a high strength-to-weight ratio of the strands and the cables cost less to place than precast panels, traditional cast-in-place or concrete masonry barriers.

External links

• The Post-Tensioning Institute - An international technical institute dedicated to post-tensioned concrete representing a community of professionals and businesses