C-Purlins are structural steel members shaped like the letter “C”. They are widely used in the construction of buildings, warehouses, and other structures for their strength and versatility. The designation 125x50x15mm refers to the dimensions of the purlin, indicating a depth of 125mm, a flange width of 50mm, and a thickness of 15mm. This specific size is ideal for various applications, making it a popular choice among builders and architects.