For safety the roof system has a 1-hour fire resistive rating and follows a list of special requirements for seismic design specifically for the framing and construction methods used. The provisions are intended to produce ductility in the arch systems by allowing the steel connections to yield plastically during a seismic event and prevent glulam members from failing in a brittle fashion. It’s also important to note that the use of glulam beams was not only an aesthetic decision but a budget conscious decision as well, making the cost of the museum about $104 psf as opposed to typical museums that range from $400 to $800 psf.