Best placed in the পশ্চিম
West is an accepted staircase placement and a common one in narrow plots; the tradition asks only that the flight turn clockwise and that the centre of the plan stay clear.
What the পশ্চিম governs
West is Varuna’s direction, associated with gains that arrive late and with stability after effort. It takes weight comfortably, and it is one of the two directions the tradition is relaxed about for utilities.
Where the সীঢ়ী belongs
A staircase is mass and movement together, which is why the tradition treats it like structure rather than circulation. It belongs in the heavy half, turns clockwise, and never sits over the centre of the plan.