The frame components were completed by May 25. Two tracks enter the building: the west track includes a drop pit and table. The east track will continue through the building to the property’s south side. Wood roundhouse doors will be installed in the large frames on the north and south walls.

In mid May the struts and trusses were assembled for the roof. The roof’s angle is meant to recall that of the roundhouse. It will also offer a dramatic entrance to the enginehouse.