殖民建筑中的木造螺旋楼梯：牛车榫接的巨构

Design an insertion into a whitewashed colonial warehouse in the manner of Lina Bo Bardi: a monumental free-standing spiral staircase of massive dark hardwood, its members joined with the pegged carpentry of ox-cart wheels and nothing else. Compose the heavy timber helix rising through a double-height whitewashed hall, thick lime-washed stone walls, a plain plank floor, no handrail infill so the joinery is fully visible, warm low sun entering through deep window reveals, eye-level view from the hall corner, 35mm lens, interior photography, ultra photorealistic, 8K