Measurements were made of the movements at connections of a 310 footrailway bridge over a period of three and a half years. The study was initiatedduring shop-assembly of a truss and was ended after three years of service loadings.As might be expected, substantial relative movements of the bridge joints occurredduring erection with the addition of dead load, bracing, and floor systems. Theeffects of the measured movements on changes in camber are discussed and comparedwith level readings taken during the three years of traffic. In essence, noservice movements were found; no evidence of a marked change in camber was found.These findings suggest that a properly designed structure with properly installedhigh-strength bolts will not slip under normal service loadings.
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