Welcome to Promein Steel LLC! Promein Steel LLC is a full-service steel fabrication and steel erection company. Our company can provide everything you need for your next project - whether it's fabrication or structural steel large-scale erection - within a manageable time frame. Our experienced professionals specialize in complex industrial and commercial projects and can execute projects with the highest levels of quality and performance. We are an innovator in steel fabrication and design, and we proudly service the hardware needs of the entire state of Connecticut. We have quick turn-arounds on custom and special order projects, and we are available for your residential and commercial needs. Contact us today for a quote!