As one of the most widely used precast components in North America, the double tee is a versatile and cost-effective precast product that can be used for a variety of projects. But what is the double tee and what makes this precast component so popular?

What is a precast double tee?

Double tee precast components tend to be used for larger structures such as parking garages or large buildings, but they can be used for other projects including shorter bridges and highway structures. The design allows them to offer wide uninterrupted spans while supporting higher loads.

The shape of the double tee resembles its name and looks like two capital “T”s put side by side. Double tees are prestressed prior to casting with prestressing tendons which consist of high tensile strength cables. They can be used as both horizontal and vertical load-bearing members.

What are the benefits of Double Tees?

Precast double tees benefit from the same attributes as other precast components including resistance to extreme weather, minimal required maintenance, and cost-effectiveness in comparison to other construction materials. In addition, double tees also have their own specific benefit which is the ability to provide long, clear spans while still supporting high loads.

Precast double tees can be designed for spans reaching up to 100 feet. This is an important benefit for structures such as bridges which span over wide areas or buildings created with open-concept designs.

NPCA tested the strength of a precast double tee beam against multiple 4,400 lb barriers placed on top. What happened? Watch the video to find out!

Camp Shelby Training Center

The Camp Shelby Operational Readiness Training Center is an all precast facility whose construction included the use of 163 double tees. Precast was used to create the facility to meet occupant load requirements.

The Park at South Market

The Park at South Market is an excellent example of the most common use of double tee precast beams. The project included 286 12’ double tee beams integral to the construction of parking garage located in New Orleans, LA.