Side
af
764
Forrige
Næste
113 OF ENGINEERING FOKMULÆ.
Cast-ikon Columns. (Hurst.) Tvth of Breaking Weight in
tons of Solid, Columns, ends flat and fixed.
11
Length of Column In feet.
10. I 12. J 14. | 16.
20.
25.
•«2 •50| ■34 ’ 25 •19,
if 1-43 •87 •60‘ •441 •34,
2 2-31J 1’41 •97 •71 •55
21 3-52 2-16 1*48 1-08 •83
5-15 3-16 2-16 1 • 58| 1-22
7-26 4-45 3 • 05 2’23 1-72
3 9'93 6-09 4-171 3-06! 2-35
3( 17-29 10-60 7-26 5-321 4-10
4 27'96 17’15 11-73 8-611 6-62
42*73 26’20 17’93 13-1510-12
•15
•27!
■44
•67
•97
1-37
1-87
3-26
5’28
... 8-07
5 I 62-44 38-29 26-20,19-22:14-79 11-79
5| 88-00 53'97 36‘93 27-09I20-S4 16’61
6 i 120-4 73-82 50-51 37-05 28-51 23-72
160-6 98-47 67-38 49-43 38’03 30’31
7 j 2U9-7 128-6 87-98 64-53 49-66 30’57
li 26S* 8,164*8 112*8'82* 73 63’66 50-73
•11
*18
-30
I '46
i "66l
! ’94
1-2«
2*23
3-61
5’52
8-0ÖI
1.1-37
•07
•13
•20
•31
•56
•64
•88
1-53
2-47
3-78
5’52
I'IS
•36
•54
•80
1-12
1-53
2-67
4-32
6-60
9-65
13-60:
18-60il5'55ilQ'64
24-81 20-74 14-19
32’39.127’08 18*53
41-53.34-72 23’76
8 I 339-1 207’9 142’3 104• <80• 31 64-00 52-39'-13’80 29*97
8|| 421’8 25S-S 177-0129r8 99'90.79-61;65-l«54USi37»28
9 i 518'2 317-7 217’4 159'5 122-7 97-80|80-05|66,92l45’80
I 9f 629-5 3S6-0 264’2 193-8J.49-1 llS-8,97-25181-70'55-64
10 757’2 164-3 31 7’7 233" 1,179’3 142’9117‘0'97-79 66'92
10^1 902’6 553’5 378’7 277’8:213-8 170‘3 139-4lllé-6h9’77
11 |1061-l 65P4 4+7-S 328*5,252*? 201*41164*9 137’8 94-31
Ilf 1252-3 767’9 525'5 385--L 296'6 236'4 193’5J61 • J110-7
12 jI459‘6j895‘l 612-5 449’3^45-T 275’5 225• 5'1 «8• 5f 129• 0
The correction for Short Columns should be applied where
the leHgth is less than 30 D.
' sc
Strength in tons of Short Columns =s------,
, 10S + fC
S being the strength for Long Columns given in the above
Table, and C — 49 times the sectional area of the metal in
inches.
Hollow Columns.
The strength nearly equals the difference between that of two
Solid Columns the diameters of which are equal to the External
and Internal diameters of the hollow one.