Even for a tied bellow, portion of weight would have to be shared by turbine end, if one does not separately support the bellow assembly with a spring.

For such a symmetric type of inline bellow configuration, 50% of total 5000 kg should go to the turbine end unless you support the exj assembly separetely with variable spring supports.

Anyway, due to the tie-rods the weights will go directly to turbine end and the bottom end as tensile and compressive forces respectively, thereby not overloading the bellow elements.

Best way to verify is to test a small such bellow in vertical orientation. Ask the EXJ vendor to demonostrate what he/she claims.

regards,

sam