“Architecture is supposed to shelter and protect us, yet exposure and openness are also qualities of urban density,” says sculptor Sarah FitzSimons, 38, who explores these ideas in her public sculpture House, which opened at Ohio Street Beach on October 3. Composed only of flexible aluminum poles and elastic cords, the full-scale two-story house is more solid than it looks; the structure survived an earthquake when FitzSimons first installed it in the California desert last year. “It’s a balancing act between wanting to have the most minimal lines and not having it collapse,” adds FitzSimons, who spent five years perfecting the design.