I do not know of a web-site for Beam prices. Steel prices can, and sometimes do, fluctuate daily, albeit only a couple of cents, but it can happen. To maintain a website and get good pricing to use could be difficult.
I would suggest using a vendor that is closely located to where you are and begin to establish a relationship for your price and delivery needs. There are an abundance of steel suppliers through out the United States that can provide the prices and competitiveness you would want.
