These warehouse building material can last for long presumably 50 years or more and can be built into customized designs and structures adjusted to your requirements. Industrial grade materials and 100% pure steel quality make these warehouse building material way more durable, invincible, and powerful.Modern prefabricated construction steel structure material Product information. Steel structure workshop is made from welding H section steel as column and beam, some of them has crane beam, it's made from H steel beam too.Galvanized C ,Z section steel as wall purlin and roof purlin, Its wall and roof are made of metal steel sheet or sandwich panel. The door is electric shutter door or flat open door. Window is pvc or aluminum window.