MILWAUKEE -- A recent 12 News Investigation into a building material you may have in your home will, "Undoubtedly save firefighters lives."

Those are the words of a New York fire captain -- one of hundreds of fire professionals across North America now turning to that 12 News report to help keep people safe.

WISN 12 News put wooden floor beams to the test. They're lightweight, inexpensive and very strong -- used in newer homes everywhere. They're a perfectly good building material and nothing to be concerned about -- unless they catch fire. Then, they can be killers.