STEEL MILL BUILDINGS 



INTRODUCTION. 



Steel mill buildings may be divided into three classes as follows: 

 (i) steel frame mill buildings; (2) steel mill buildings with masonry 

 filled walls; and (3) mill buildings with masonry walls. 



i. Steel Frame Mill Buildings. A steel frame mill building 

 is made by covering a self-supporting steel frame with a light covering, 

 usually fireproof. The framework consists of transverse bents firmly 

 braced by purlins, girts and diagonal braces. The usual methods of 

 arranging the framework are as shown in Fig. I. 



(c) 



FIG. i. 



An intermediate transverse bent (c), Fig. i, consists of a steel 

 roof truss with its ends supported on steel posts, and is made rigid by 

 knee braces. The posts are either supported on the foundations or are 

 anchored by them. The end bents are made either by running the end 

 posts up to the end rafters as in (a), or by means of an end trussed 

 bent as in (b) Fig. i. The end trussed bent (b) is usually preferred 

 where extensions are contemplated, although the end post bent (a) is 

 equally satisfactory and is usually somewhat cheaper. 



