Our I-Beams are comprised of A36 grade carbon steel. These I Beams can be used for a vast number of projects, which include, but are not limited to: ramps, walks ways, drains, staircases, trolley ways, lifts, hoists, house/building construction, trailer and truck bed framing. The dimensions of this product are: 4" high (flange-to-flange), 2.660" wide (end-to-end flange width), .291" thick (average flange thickness), and .190" thick (web thickness). This product weighs 7.7 lbs. per foot. Please let us know if you're in need of longer, or custom lengths, as this material does come in 40' lengths.