OF IRON BEAMS. 



499 



I conceive this beam to have been rendered 

 somewhat weaker, by a small twist in the 

 vertical part of the casting. 



XXVI. EXPERIMENT. 



Distance between supports 7 feet, depth of 

 beam 6.93 inches. 



DlmeasioDi of ■cetion in inches. 



Area of top rib = 2 25 X .34 =.765 



,. of bottom rib =6 05 X .76 = 4.537 



Thickness of » 



vertical part I * 



Area of section = 7-67 inches. 



Weight of casting = 1 cwt- 1 qr. 6 lbs. = 

 146 lbs. 



WriKhtt 

 in lbs. 



8637 - 



9327 - 



10017 - 



10707 - 



11397 - 



12087 - 



13543 - 



14271 - 



14999 - 



Deflectiooi in p«rts 

 of an inch. 



.20 - 



*23 - 



.24 - 



25 - 



lUtarned to, 

 (weigbts remoTed.) 



.27 - 



32 - 

 35 - 

 .37 - 

 3 R 2 





 

 

 

 

 

 doubtfal. 



apparent set. 

 .03 



