Four-point stepladder bracing system, brace and method
作者： Russell Patton
DOI:
关键词: Point (geometry) 、 Engineering 、 Brace 、 Structural engineering 、 Bracing
摘要: A ladder includes a first rail. The second step attached to the rail and brace Each is at least two distinct points respective for supporting rails of central portion. portion extending from which attaches step. method using ladder. steps placing load on There distributing through rails, respectively.
lens.org 参考文章(1)
Timothy G. Wille, Adjustable stairstep system and process of assembling and installing same ,(1995)