Weight distribution chains stretched too tight?

Thanks for the replies... I fixed the picture access as well. Sorry I don't post pictures much, and the only way I could think to do it was from my Google Drive... maybe there is an easier way. It sounds like it can take the additional load in the chain, but I wanted to check before I embark on a long road trip, etc. Does anyone replace their chains after a certain number of years or uses due to chains are capable of stretching, becoming worn, fatigued, etc.?