SECTION III., 1902 [3] Trans. R. S. C. 
.— On the Stresses Developed in Beams Loaded Transversely. 
By Henry T. Bovey, F. RB. S. 
(Read May 27, 1902.) 
The present paper contains further results obtained with the new 
extensometer described in Section III., Vol. VII., of the “ Transactions ”’ 
of the Royal Society of Canada, in the year 1901-02. 
The loading was of the same description and of two kinds, namely, 
(1) loads of increasing magnitude were placed at the centre; and (2) 
equal loads of increasing magnitude were concentrated at two points 
equidistant from the centre, the maximum B. M. in each case being the 
same as for the corresponding centrally placed load. 
In all measurements, the beams were placed on supports 60 ins. 
apart and the distance between the extensometer points was 8 ins. 
In each set of observations, the horizontal row at the top of the 
columns gives the loads successively placed on the beam, and the columns 
under the several loads give the corresponding changes of length 
between the extensometer points in millions of an inch, each change of 
length being the average obtained from five to ten observations. 
The decrements and increments of length are indicated by negative 
and positive signs respectively. 
A.—EXPERIMENTS WITH AN 8 IN. STEEL RoLuep Joist WxIGHING 
492 LBs. PER LINEAL YARD. 
An extensometer was placed horizontally at the centre of gravity of 
the section and extensometers were also placed on parallel lines at 
distances of 1:27 ins., 2°54 ins. and 3-81 ins., above and below the centre 
of gravity, the extensometers in the last case being on the flanges. 
LoApDs CONCENTRATED AT 30-IN. CENTRES. 






3,000 lbs. 6,000 Ibs. 9,000 Ibs. 12,000 Ibs. 15,000 Ibs. 
— 930 — 1701 — 2415 — 3126 — 3824 
Gal — 1228 Gris — 2395 — 2840 
— 323 = GW — 903 EU — 1460 
=) KG + D + 13 + 22 + 25 
+ sil + 627 + 937 + 1239 + 1536 
+ 631 + 1256 + 1863 + 2446 + 3008 
+ 891 + 1682 + 2478 + 8252 + 4038 




By plotting the above results, diagram I. is obtained. 
