The book Proceedings of the Annual Convention 50 (1949) was written by author American Railway Engineering Association Here you can read free online of Proceedings of the Annual Convention 50 (1949) book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Proceedings of the Annual Convention 50 (1949) a good or bad book?
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The grading or gradings used shall be those most nearly representing the aggregate furnished for the work. Note. — It is recognized that different specification limits may be required for gradings E, F and G than for A, B, C and D. It is urged that investigations be conducted to determine the relationship, if any, which exists between results for these coarse gradings using the 10,000 g. samples and the finer ones using the 5000 g. samples. ■5 Appendix B to Report of Committee II — Ballast, Pro...ceedings, Vol. 31, 1930, p. 761. « Appendix A to Report of Committee II — Ballast, Proceedings, Vol. 33, 1932, p. 350. ' 1947 Supplement to Book of ASTM Standards, Part II, p. 114. 690 Roadway and Ballast Table 1. — Change to read as shown in the accompanying Table Sieve Size (Square Openings) Retained Passing On In. In. Table 1. — Gradings of Test Samples Weight and Grading of Test Sample, B C D E F 3 2 1 v& No. 3 No. 4 2/2 . 2 IK . 1 y2 . H . No. 3 No. 4 No. 8 .1250 .1250 .1250 .1250 2500 2500 2500 2500 2S00a 2500a 5000a 5000a 5000a 5000 5000a 5000a a.
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