Moorthi,
By the way the Tie-Rod seats are detailed, I believe this joint is intended to absorb some lateral offset.
Also, you mention "no pressure thrust". If your two ends move towards each other, your tie-rods will become slack and you WILL have pressure thrust.
If you do have axial movement, it's going to take a huge force to over come the friction caused by the packing to allow the movement. When/if this happens, your anchors will see this friction load and the pressure thrust.
Awhile back the was another thread on this board with a lot of discussion about slip joints. I think it was about pipe rack design. You might do a search, it had a lot of replies if I remember correctly.
As Richard Ay said, you need to get the values for stiffnesses and friction from the vendor. Before contacting them, you might review the other vendor data sheets for this item.
Good luck,
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NozzleTwister