. Electric railway journal . eld previous to the section, V. , secretary of the Connecticut Co., was electedvice-president in Mr. Coltons place, and E. T. Chapman,treasurer of the company, was appointed to fill his placeon the program committee. Lag Screws vs. Bolts in Trestle Construction THE timber trestle builder has always been accus-tomed to the use of bolts, particularly in the decksof railway trestles. The general practice at presentcalls for the bolting of wooden guards to the ties. Theguards are also dapped to fit over every tie, and theties are dapped to fit the stringers. Th
. Electric railway journal . eld previous to the section, V. , secretary of the Connecticut Co., was electedvice-president in Mr. Coltons place, and E. T. Chapman,treasurer of the company, was appointed to fill his placeon the program committee. Lag Screws vs. Bolts in Trestle Construction THE timber trestle builder has always been accus-tomed to the use of bolts, particularly in the decksof railway trestles. The general practice at presentcalls for the bolting of wooden guards to the ties. Theguards are also dapped to fit over every tie, and theties are dapped to fit the stringers. The purpose of allthis has been to prevent shifting of the timbers, eitherlaterally or longitudinally. The bolting and dapping callfor a large amount of labor and material, and timbershave to be larger in size than is really necessary toprovide for the dapping. The committee on wooden bridges and trestles of theAmerican Railway Engineering Association has beeninvestigating this feature of trestle construction with ^ViocM smtws. Zll tLCVATION. ^^ IA9 SCRBM —) O. ^H^ M-M N-N HN H- & Sujino (uiL %
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