The last major components to be put into place were the sixteen semi-circular ribs of the vaulted transept, which were also the only major structural parts that were made of wood. These were raised into position as eight pairs, and all were fixed into place within a week. Thanks to the simplicity of Paxton's design and the combined efficiency of the building contractor and their suppliers, the entire structure was assembled with extraordinary speed—the team of 80 glaziers could fix more than 18,000 panes of sheet glass in a week—and the building was complete and ready to receive exhibits in just five months.