An arrangement for measuring tension in mooring chains 38 connected to a floating structure 6. The arrangement includes a chain stopper 12 having a first portion 16 and a second portion 18. The first portion 16 has a first load bearing surface 42 and the second portion 18 has a second load bearing surface 50. The arrangement further includes at least one pin 14 arranged and designed for measuring shear loads and laterally traversing the chain stopper 12 between the first and second load bearing surfaces 50, 42, whereby, upon application of a load to the chainstopper assembly 12, the at least one pin 14 is positioned in the load path.