Abstract
Steel weight of bridges reflects their structural features. The paper first constructs the data-base by collecting more than eight thousand weight data and then analyzes statistically from various points of view. Comparisons by structural types provide valuable information to engineers for selecting the most suitable type. Further, comparisons by years describe the change of design specifications or design concept which comes from the social situation. The current design for rational girder bridges is compared with other similar types of ordinary design. The influence of the change of the live load is also discussed.
