Abstract
This paper continues an account of a laboratory investigation into the load—deformation characteristics of steel arch supports and makes particular reference to the influence of struts. Current United Kingdom practice regarding struts is described along with details of the importance of strutting in promoting support stability. Strut theory is briefly reviewed and the significance of the slenderness ratio upon the stability of the strut is discussed. Tests on groups of arches are described, these having been designed to investigate the effect of: (a) spacing of arches (i.e. length of strut), (b) strength of strut, and (c) number of struts. These results are presented and conclusions drawn regarding the influence of struts upon the load—deformation characteristics of the steel arch support system.
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