8 ROYAL SOCIETY OF CANADA 
LoAp CONCENTRATED AT CENTRE. 






3,000 Ibs. | 6,000 Ibs. 9,000 Ibs. 12,000 Ibs. 15,000 Ibs. 
— 847 — 1660 — 2488 — 3270 — 4077 
Se i PR ATEN 7 — 1409 — 1873 — 2311 
aaa fa pe — 486 — 72 —. 537 
yap. NAT SE en + 285 +° 811 + 878 
+ 387 + 742 + 1063 + 1876 + 1687 
+ 65 | + 1938 + 1796 + 2384 + 2907 
+ 1099 | + 2049 + 2866 + 3707 + 4504 


By plotting the above results, diagram VI. was obtained. 
TABLE OF MAXIMUM BENDING MOMENTS AND DEFLECTIONS. 





Load in lbs. Max. Bending Mo- Deflections in 
ment in in.-lbs. inches. 
3000 45000 01 
6000 90000 | 02 
9000 135000 | -03 
12000 i80000 -04 
15000 225000 “05 



In diagram IV., in which the loads are concentrated at 8-in. centres, 
the stress in the material is almost directly proportional to the distance 
from the neutral axis which seems to be slightly above the centre of 
gravity. . 
The diagrams for the 30-in., 20-in. and 15-in. concentrations indicate 
that the stress in the material increases more rapidly than the distance 
from the neutral axis, while the increase is not so rapid for the 6-in. 
concentration and for the beam loaded at the centre. In the last case, 
the neutral axis has moved very appreciably above the centre of gravity. 
