Complex sentence: Section Beams are made of steel and they have a specific lengths and shapes like I beam L, channel and I flanged beam, these types of section are usually used in steel structures and they are connected by plates of steel too.
Split into simpler sentences: Section Beams are made of steel and they have a specific lengths and shapes like I-beam, L, channel and I flanged beam. These types of section are usually used in steel structures and they are connected by plates of steel too.