AUSTRALASIAN ASSOC. ADV. SC. VOL III., 1891. PLATE XIV. 



COMPARATIVE DIAGRAM OF WEYRAUCH'S & BOARD OF TRADE RULES 



FOR THE 



SAFE LOADS ON IRON 



fljj— IV 09 cm 07 



Black line gives safe loads fbr intermittent a. akemabng stresses 

 (orwrougM iron giving «n ultimata 

 Strer)gthi<f2l tons per sq.inCWmniucM 



Lina dottAd thus- - tenaion (Board of Trade) 



d* do. comprewHon do. 



(re dfs va vi on an vo -on -at -g^ _ <m -oo 



0^ -07 -o» 



^^M AJ 



NOTE. Factor efaafety for btoei c line taken as i 

 To diUtLt6ri6t> :Pl^Jiear ^ :X^o^. Wb.rrran. . 



