DESIGN OF STRUCTURES 241 
res ents the standard practice of Mr. George A. Morrison, the cele- 
rated American bridge engineer. This bearing is fully illustrated and 
--=>--- X =------> 
RAO MOy SOSH 
SSS BS =\s 
NS STV 
Pe oa Wa 
: (ZL Boe ea WiLL 3 ie VL ZL 
S 
N 
> 
i ULI 
Fia. 369. 
described in the Transactions of the American Society of Mechanical 
Engineers for 1893. The following particulars and table of dimensions 
_ are taken from Mr. Morrison’s paper :— 
tainber Number ar di srt Total Safe Leads at 
of of | Rollers (a). | Plate (3). | Being: | Linear Inch. 
| Rollers. | Rails. Inches, | Inches, | !=ches- Lbs. 
3 6 175 4 45 135,000 
4 8 23:5 5 80 240,000 
5 10 29°5 6 195 375,000 
6 12 355 8 180 540,000 
7 14 4145 9 245 735,000 
8 16 47-5 10 320 960,000 
9 18 BBS rs 405 1,215,000 
10 20 59°5 12 500 1,500,000 
rs 22 65°5 13 605 1'815,000 
12 24 715 14 720 2'160,000 
