N. M. NEW·MARK IVIL ENGINEERING STUDIES 'C of' ..L STRUCTURAL RESEARCH SERIES NO.226 TORSION Room' t 'Ref erenc e . c Del'a:rtmen llet'Z . ne e 1'l:no 01. - 0 a' C 0 • 1 ("' i n- 1. '4.J. "E 13\).1. ... ·u..--- '-' • 'B1.0 0 Co· f 11.1.in O l. S -ri 0 t1 0 5 un). 11.1.J.noJ. Uroa.na., A REPORT ON A RESEARCH PROJECT Sponsored by THE UNIVERSITY RESEARCH BOARD UNIVERSITY OF ILLINOIS URBANA, ILLINOIS SEPTEMBER 1961