SUPERHIGHWAY DRIVER DIRECTION STRUCTURE ERECTIBLE IN THE FIELD
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Abstract
SUPPORT STRUCTURE OF LIGHT METAL FOR DRIVER DIRECTION SIGNS THAT OVERLIE VEHICULAR PASSAGEWAYS ON SUPERHIGHWAYS IS ERECTED IN THE FIELD FROM STANDARDIZED COMPONENTS. PREFORMED TUBULAR WEBS OF LIGHT METAL ARE JOINTED TO SPECIALLY DESIGNED TABULAR CHORDS OF LIGHT METAL BY MEANS OF INTEGRAL FINS ON THE CHORDS, SPECIALLY CONSTRUCTED AND STRENGTHENED END SEGMENTS OF THE WEBS, PRESHAPED STRESSDISTRIBUTION PLATES OF LIGHT METAL, AND BOLTS MUTUALLY INTEGRATED INTO JOINTS THAT CAN BE READILY BOLTED TOGETHER TIGHTLY IN THE FIELD TO PRODUCE A HORIZONTAL SIGN SUPPORT STRUCTURE FREE OF LOOSENESS AND HAVING MORE THAN ADEQUATE STRENGTH AND ABUNDANT DEPENDABILITY UNDIMINISHED BY HIDDEN STRUCTURAL DEFECTS OR BY OUTDOOR EXPOSURE.
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