id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ms35t724v35	Sally Suzanne Williams	Modernizing the System Hierarchy for Tall Buildings: A Data-driven Approach to System Characterization	2015		.txt	text/plain	156	5	26	This implies that few modern systems obey this classical hierarchy, requiring a new approach to classify structural systems and their applicability to modern practice as both a design aid and educational tool for future designers. In the mid-1960s, Fazlur Khan created a hierarchy of structural systems, ranging from two-dimensional moment resisting frames to three-dimensional tubular systems, to aid designers in making efficient choices to resist lateral loads.	cache/ms35t724v35.txt	txt/ms35t724v35.txt