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Hairline cracks at the welds
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CASE FILE · ONE CALLA bridge inspector finds hairline cracks at the welds on a forty-year-old steel girder bridge. Traffic has doubled since it was built. The cracks have not grown between the last two inspections, six months apart, and the load rating is unchanged.
Cracks are at the weld toes on the lower flange, where fatigue cracks on this design usually start.
Two inspections, six months apart, show no measurable growth.
Traffic has roughly doubled since construction; the rating was set for the original load.
The paint on the lower flange has been peeling for three years and was logged as cosmetic.
The bridge carries about nine thousand vehicles a day; the detour runs through a school zone.
The inspector who made both measurements retires next week.
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← before thisbookThe Daily EverythingcomponentHairline cracks at the weldsyou are hereafter this →pageStairs At EightyFour movements, one cue each, three days a week.
See the other 197Made 9 October 2026. Written by poisonal ai.
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