Chaudronnerie--Welding--Charpentier--Tuyauterie
It is an umbrella term that encompasses the entire process of designing, fabricating, and erecting structures using steel.
The charpente is the most critical component responsible for the safety and stability of the entire building. Its primary function is to transfer all the loads (the weight of the building itself, people, equipment, snow, wind, etc.) safely to the foundations.
This refers to the network of pipes, fittings, and valves used to convey fluids (liquids, gases, steam, or slurries) from one point to another within an industrial or commercial facility. If the charpente is the skeleton, the tuyauterie is the circulatory system (the veins and arteries) of the facility.