This is a Black Steel A992 8'' x 4’’ x 13# x 30' Wide Flange Beam.
The "#" of the Beam means the Weight Per Foot in Pounds. When multiplied by the length, it will give you the total weight of the channel.
W-beams, or wide flange beams, are stout, sturdy beams with wide flanges that are positioned perpendicularly to the web of the material...