724 MR. FAIRBAIRN’S EXPERIMENTAL INQUIRY 
Experiment 9. — October 10, 1845^ 
On a malleable iron beam, of the annexed sectional form (see fig. 66), 10 feet 
S inches long, and 10 feet between the supports. 
Dimensions at a=l’000 in.x2f in. 
Dimensions at &= "BSOin.XS in. 
Dimensions at c=: '440 in. X 4’30 in. 
Weight of beam=247 lbs. 
Weight of shackle=885 lbs. 
Weight 
ill lbs. 
Deflection 
in inches. 
Deflection 
load 
removed. 
Remarks. 
885 
2,631 
•04 
4,358 
•12 
6,098 
•15 
7,827 
'19 
9,585 
•21 
11,278 
•26 
12,980 
•30 
•03 
14,693 
•35 
•03 
16,373 
•45 
•09 
18,115 
18,962 
•68 
•26 
With this weight the beam was distorted and the experiment discontinued. 
Ultimate deflection = •71- 
In both these experiments the beams yielded to lateral deflection, showing certain 
defects of form arising from want of lateral strength and breadth in the top and 
bottom flanges. 
