Healy Guest House also known as Cocoon House is a small house located at Siesta Key, Sarasota, Florida used post and beam with catenary tensile roof made of steel sprayed by plastic. The house designed by Ralph Twitchell in 1948-1949 with the rectangular shape.
The building only 735 square feet in area included a porch and a balcony on the river side. The roof created by 22 feet curving steel, sprayed by plastic, spanning between the post and beam construction. The house divided into four spaces, but the resultant segmental spaces are not satisfactory. The walls created by a breathing wall makes the air circulation on the house.