I had finished the walls but wanted to put some additional stiffeners which would also later serve as supports for the second level. The stiffeners or external ribs were described briefly in the Thin Walls post of June 23, 2009. Most of the stiffeners were cut previously when we were putting up the new thin walls (see the July 3, 2009 post). Because the walls have some curvature to them the stiffeners are cut to match the curvature. Because the curvature should be the same at the top as the bottom, when the walls were erected three or four identical stiffeners were cut. It was quite easy then to attach the stiffeners to the new walls. Since the walls are only 1/8" thick the stiffeners are secured using 1 1/4" dry wall screws from the opposite side of the wall.
John Ryan and Michael Lopez holding a stiffener over Summerland
The problem came when stiffeners had to be cut for the old thin walls that were errected initially. Each individual stiffener had to be measured and cut.
Walter Naumann measuring a stiffener for the old thin wall
In addition to the stiffeners, I had a bookcase that I wanted to put some doors on so that I could hand a blackboard for crew announcements and a crew call board. Two of the club members tackled that task. By the end of the evening we had accomplished much and another step was accomplished.
Art Sylvester and Jim Felland work on the bookcase doors
The blackboard and crew call board on the finished doors