EXAMPLES TO THE FIRST SERIES. 
xix 
3 X 14'5 
The weight upon each foot in length of a joist is = 3*625 cwts. 
12 
W = 3-625 cwts. D = 3IJ. 
W 3-625 
77 = — T- = 3'625 X 50 = 181-25 cwts. uniformly loaded. 
The scantlings are given by Table XIV. 
If the length of the joists be 7 feet, the scantlings are, — 
..8-02X2; 7-71 X2J; 7-44 X2i; 7X3; 6-65X3^; &c. 
Deflection ^ of an inch. 
If the length of the joists be 8 feet, the scantlings are, — 
.. 9-16X2; 8-81X2i; 8-5lX2i; 8X3; 7-60X3i; &c. 
Deflection 3^ of an inch. 
And so on for other lengths. 
Data for the Beams. 
Beams distant apart from middle to middle, 8 feet ; 
Weight upon each foot in length, 8 X 3 = 24 cwts. ; 
Deflection, of an inch to the foot. 
W = 24 cwts. D = ^. 
W 24 
— ^ = — = 24 X 40 = 960 cwts. uniformly loaded. 
W 
By Table XX., — = 980 cwts. uniformly loaded : the scantlings are 
given by that table. 
If the length of the beams clear of the supports be 12 feet, the scant- 
lings are, — 
.. 15-15X8; 14-57X9; 14-07X10; 13-63X11; 13-24X12; &c. 
The weight upon each of the beams is 12 X 24 = 288 cwts. And if 
14-07 X 10 be the size of the beams, the breaking weight of each beam 
by Table XX. is 7-85 X 168= 1318-8 cwts. 
And HE! = 4-57. 
288 
That is, about 4^ times the weight upon the floor is the breaking weight 
of the beams ; the deflection of each beam with 288 cwts. uniformly 
loaded is i§ or 
