Architectural structures having an expandable frame

An architectural structure comprising:

• no more than one row of vertically oriented expandable structures, the expandable structures including:
• a plurality of slats each having a convex curve, the plurality of slats comprising:
• a first slat having a first major surface, a second major surface opposite the first major surface, an upper most end, a lower most end, and no more than one convex curve about a midportion between the upper most and lower most ends of the first slat,
• a second slat having a first major surface, a second major surface opposite the first major surface, an upper most end, a lower most end, and no more than one convex curve about a midportion between the upper most and lower most ends of the second slat, thereby defining not more than one diverging section and one converging section of the first and second slats, wherein the first and second slats include no more than two connections, to each other a first connection connecting their respective upper most ends, and a second connection connecting their respective lower most ends of the first and second slats, and wherein the first and second slats are directly connected to each other at their respective first major surfaces,
• a third slat having a first major surface, a second major surface opposite the first major surface, an upper most end, a lower most end, and no more than one convex curve about a midportion between the upper most and lower most ends of the third slat, wherein the respective midportions of the second and third slats are directly connected to each other at their respective second major surfaces, and,
• a fourth slat having a first major surface, a second major surface opposite the first major surface, an upper most end, a lower most end, and no more than one convex curve about a midportion between the upper most and lower most ends of the third slat, thereby defining not more than one diverging section and one converging section of the third and fourth slats, wherein the third and fourth slats include no more than two connections, to each other a first connection connecting their respective upper most ends, and a second connection connecting their respective lower most ends of the fourth and third slats, and wherein the third and fourth slats are directly connected to each other at their respective first major surfaces,
• wherein the expandable structure is moveable between a collapsed position and an expanded position;
• a spine configured to maintain the expandable structure in the expanded position and positioned about a middle portion between the upper and lower most ends of the first, second, third and fourth slats,
• a top plate directly attached to each of the first, second, third, and fourth slats completely covering the upper most end of the first, second, third, and fourth slats, and
• a bottom plate directly attached to each of the first, second, third, and fourth slats completely beneath the lower most ends of the first, second, third, and fourth slats.