Here's a detail of the steps.  Photo 1 of 8 in 8 Creative Ways to Let the Little Details Shine from A Creative Staircase for a Compact NYC Loft

8 Creative Ways to Let the Little Details Shine

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The interlocking, exposed edges of these plywood steps designed by General Assembly are both sculptural and functional, helping to visually orient climbers as they ascend with the pronounced contrast between the dark veneer of the plywood and the lighter exposed edges. The stairs were designed as a kit-of-parts to reduce cost, and also provide open storage on the side.