20 Mar 2019 Kym Graves Construction Schedule, Gandy Boulevard, Selmon Extension Blog, Selmon Extension Info March 20, 2019 Kym Graves BLOG – What is the Abutment? The abutment ramp is one of the main components of the Selmon Extension, which is built to support the lateral pressure of the bridge span. The abutment is also referred to as the endpoints. It’s also known as the approach ramp. Share this...FacebookTwitterLinkedinemail