Side
af
764
Forrige
Næste
157
OF ENGINEERING FORMULÆ.
to British units. When Weyrauch wrote, the
tension experiments alone were completed. A
factor of safety of 3 is ample when these results
are allowed for.
Values of a in Tons per Square Inch.
Min. -r max. t
stress .. .. /
a (wrought iron)
a (Krupp’s cast!
øteel) ., .. J
l-o| -J -8 -7i -6
—.i-------1-----
20-8 20'2, 19-5, 18'8 18’1
46-4' 44-2i 41'8 39’3 36'9
Min. ~ max. )
stress .. • • |
a (wrought iron)
a (Krupp’s cast I
steel) .. .. )
•5
17-4
345
•4| -31
16-7 16-0
32-0 29’6
•2;
15-3
27*11
•1
14-6
24-7
Min. -T- max. )
stress .. ..J
a (wrought iron)
a (Krupp’s cast I
steel) .. .. J
-0-1
13-3
21’3
-0-2 -0-3 -0-4 -0’5
126 12-0, 11-3 10-7
20-4 195j 18-6 17-6
Min. -4- max. iLn-fi .
stress .. .. / ■ i
a (wrought iron)! 10 • 0,
a (Krupp’s castr J
steel).. lb‘Z
0-7
-0-8 -0-9 -1-0
8-7' 8-1 7'4
14-9 14-0‘ 13-0