From Franck Chivée, La Rochelle, Greement, I got the numbers you can see in the sheet. I got thenumbers when he checked our rigging. Franck Chivée is a rigger and very familiar with Amel and Amel rigs. As the backstays of the Amel 54 are 7 mm thick, the tension should be between 600 and 800 kg.

Franck's figures are based on the values that Selden recommends. 

The best will be to ask him.

You can contact Franck by e-mail: larochellegreement@...

Diameter	breaking load in kg	nominal tension 15/100 in kg	nominal tension 20/100 in kg
7 mm	4.050	607	810
8 mm	5.220	783	1.044
10 mm	7.900	1.185	1.580
12 mm	11.055	1.658	2.211