Refer to Design Step 1 for introductory information about this design example. Additional information is presented about the design assumptions, methodology, and criteria for the entire bridge, including the steel girder. Figure 3-1 Span Configuration. Figure 3-2 Superstructure Cross Section.
HYPOFLUORESCENCE Hypofluorescence may be caused by 1) blocked fluorescence, which is synonymous with negative fluorescence or transmission decrease, or 2) a vascular filling defect. Blocked fluorescence corresponds to the size, shape, and location of the blocking material seen ophthalmoscopically.
What actually causes fluorescence? Some minerals fluoresce (give off light) when exposed to invisible ultraviolet light. This phenomenon is called fluorescence. Some other objects such as paints, clothes, dentures, urine, scorpions, sagebrush, and greases will also fluoresce.