. American engineer and railroad journal . 1,127 cu. ft. Maximum capacity, Iron ore at 150 lbs 169,( Maximum eapaein , upper <a,- at . . Maximum capacity lime torn bs Maximum capacity coal at 52 lb Standard load limit 110,000 lbs Estimated weight 10 lbs Journals :.<2 by 10 Inn. It is evident that the stresses have been carfully considered for the record of the design in this respect is included in the drawings. The assumed load is as follows Base dead load Maximum live load 120,000 lbs. Weight of trucks 100 lbs. Deduct weight of wheels a ml axles 3,400 lbs Weight of trucks except wh
. American engineer and railroad journal . 1,127 cu. ft. Maximum capacity, Iron ore at 150 lbs 169,( Maximum eapaein , upper <a,- at . . Maximum capacity lime torn bs Maximum capacity coal at 52 lb Standard load limit 110,000 lbs Estimated weight 10 lbs Journals :.<2 by 10 Inn. It is evident that the stresses have been carfully considered for the record of the design in this respect is included in the drawings. The assumed load is as follows Base dead load Maximum live load 120,000 lbs. Weight of trucks 100 lbs. Deduct weight of wheels a ml axles 3,400 lbs Weight of trucks except wheels and axles 1,000 lbs. Gross body dead load — In* Deduct for bolsters, etc 2,000 lbs. Net body dead load 24,000 lbs Assumed live load 00 lbs Total static body load 120,000 - lbs. Add 50 per cent., or Final total for calculation Load per cubic foot for calculation 191 lbs. Static load at end of bolster, plus 10 i lbs Flange stress Ins Stress allowed per square Inch 15,000 lbs. Twin Spring Standard Draft Cear, Draft use in the construction steel cars of 30. 40 and 50 tonscapacity these builders have designed a standard draft is a twin spring gear with east steel draft lugs riveted tothe webs of the center sills and adapted to a space of about Isins. between the webs, and to sills from li to 15 ins. high. Thecoal car illustrated in this connection was arranged with aview of using the Dayton Malleable Iron Companys draft rig-ging. The drawing of the standard draft gear illustrates thecross section of the cast steel end sill used by these builders:this, however, was not employed in either of the designs il-lustrated here. 182 AMERICAN ENGINEER AND RAILROAD JOURNAL. (Established 1S32.) Engineer railroad Journal PUBLISHED MONTHLY BY R. M. VAN ARSDAL1,. .1. S. BdNSALI,, Business Manager. MORSE BUILDING NEW YORK U. M. BASFORU, Editor. E. I SILK, Associate Editor. MAY. 1901. Subscription.—$8
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