Hello Sandeep,
I am not sure about the exact layout you want to achieve - I attached a sample page which has two different RadSlidingZones with a RadSlidingPane in each of them and as a result you can have both the RadSlidingPanes docked one next to the other one. You can style the page further , e.g remove borders, use colors in order to make it more similar to your initial requirement but this is the closest solution we can offer since in a single RadSlidingZone, only a single RadSlidingPane can be docked at a time.
I hope that the provided suggestion will be helpful and even with some design changes in your layout it will be close to your requirements.
Regards,
Svetlina
the Telerik team