Ang kadena ay isang kailangang-kailangan na kagamitan sa rigging sa pag-angat ng mga pagpapatakbo ng konstruksyon. Maaaring magamit ang kadena upang ikonekta ang nakakataas na mga pulley at naayos na tirador. Ito ay isang ilaw at nababaluktot na tool sa koneksyon na malawakang ginagamit.Kadenamaaaring nahahati sa bow kadenas at U-shaped kadenas ayon sa kanilang mga katangian sa hitsura. Ayon sa hangarin, may mga: kadena na kadena, mga kuwintas na pandidikit, at mga lumulutang na kadena.
(1) Ang kadenakadena is a kadena used to connect the anchor chain. When in use, the horizontal bolt should be upward, and the horizontal bolt should be round to prevent it from rotating in the bolt hole and increase its strength. When using, first take out the horizontal bolt of the kadena, put the U-shaped buckle into the anchor chain ring to be connected, and then connect the horizontal bolt in series to an anchor chain ring above. In order to prevent the horizontal bolt from coming out, there is an oblique hole at each of the two ends of the horizontal bolt and the U-shaped buckle for driving the brake oblique pin. In order to prevent the oblique pin from coming out, a green lead seal should be inserted into the cavity left at the pin hole. Before the oblique pin is inserted into the pin hole, calcium-based grease should be applied to prevent rust.
(2) Anchor kadena is the kadena used to connect the anchor chain and the sinker, and the method of use is the same as the chain kadena.
(3) The floating kadena is the kadena used to connect the floating body and the anchor chain, and the method of use is the same as the chain kadena.
