Cable bolts are made from cable of Ø18 mm and 1+6 structure in accordance with PN-71/M-80236 standard. The following types of bolt can be distinguished:
Cable KL 18 (Plain cable)
Cable KL 18 K (Bird cage cable bolt)
The cable lay of KL 18 K bolt was modified to form birdcage like bulbs of 100 mm in length and 26 ÷ 28 mm in diameter. This ensures a better force distribution affecting the cement grout around the cable. When filled with grout the cages act like stiff bulbs in relation to the cement face.