Alfa Ideal Remodel

We are replacing the carpet & linoleum in our 5th wheel. When we pulled up the carpet on the slide-out we found a steel plate (7") along the edge with the remaining carpet underneath it. At about 3.5" there is a bolted rubber seal that curves along the slide-out subfloor. Any ideas on the function of the seal, or how we can remove the remaining carpet without losing the seal in the process?