The following tables taken from Carnegie's u Pocket Companion 5 5 will be found 
very useful in making working drawings, as well as in preparing bills of iron. 
UPSET SCREW ENDS FOE ROUND & SQUARE BABS. 
Standanl Proportions of tho Keystone Bridge Company. 
Dia. of 
Round or 
Side of 
Square 
Bar. 
IncheB. 
ROUND 
BARS. 
SQUARE 
BARS. 
Pia. of 
Upsefc 
Screw 
End. 
Inches. 
D ： a. of 
Screw at 
Boot of 
Thread, 
laches. 
Thread« 
Per Inch. 
No. 
ExcesH of 
Effective 
Area of 
Screw Eud 
over Bar. 
Per Cent. 
D ft. of 
Upset 
Screw 
End. 
Inches. 
Dia. of 
Screw nt 
Root of 
Thread. 
Inches. 
Threads 
Per Inch. 
No. 
Excess of 
Efftctive 
Area of 
Screw End 
over Bar. 
Per Cent. 
古 
聲 
.620 
10 
5 斗 
聲 
.620 
IO 
21 
h 
.620 
10 
21 
I 
.731 
9 
33 
i 
•731 
9 
37 
I 
•837 
8 
41 
Ü 
I 
•837 
8 
4^ 
I 
•857 
8 
17 
? 
1 
•837 
8 
25 
ii 
.940 
7 
23 
U 
•940 
7 
34 
1.065 
7 
35 
备 
1.065 
7 
4 8 
I« 
1.160 
6 
33 
if 
け 
1.065 
7 
29 
】l 
i 160 
6 
20 
| I 
1.160 
6 
35 
1.284 
6 
29 
| 1 is 
1.160 
6 
19 
If 
1.389 
5i 
34 
1Ä 
了 皆 
1.284 
6 
. 30 
け 
1.389 
20 
I 舍 
1.284 
6 
17 
If 
1.490 
5 
24 
1} 
if 
1.589 
5i 
23 
ll 
1.615 
5 
31 
if 
1.490 
5 
29 
If 
1.615 
5 
19 
if 
1.490 
5 
18 
0 
J.712 
4i. 
22 
l -h 
il 
1.615 
5 
26 
1.837 
4 a- 
28 
1 士 
2 
1.712 
4 圣 
30 
2 暑 
1.837 
4 a* 
18 
2 
1.712 
4 士 
20 
2! 
1.962 
4i 
24 
if 
1.837 
28 
2ff 
2.087 
4i 
30 
Hi 
1.837 
4i 
18 
2| 
2.087 
Ai 
20 
】l 
1.962 
26 
2.175 
4 
21 
1.96a 
4-s 
17 
2.300 
4 
26 
2.087 
4 各 
24 
H 
2.300 
4 
l8 
2.175 
4 
a6 
4 
2.425 
4 
1 
2.175 
4 
18 
2.550 
斗 
28 
2f 
2.300 
4 
2 斗 
2.550 
4 
20 
2.300 
4 
17 
3 
2.629 
20 
2 聲 
2.425 • 
4 
. 2 3 
2.754 
24 
2.550 
4 
28 
3i 
2.754 
3i 
l8 
2.55 。 
4 
22 
3i 
2.879 
3 卷 
21 
3 
2.629 
Ih 
23 
3l 
3.004 
3l 
26 
3i 
2.754 
28 
3.004 
19 
3i 
2.754 
ii 
3.100 
21 
3i 
2.879 
26 
5 普 
3-215 
3+ 
24 
2.879 
20 
3l 
3 •な 25 
T9 
3l 
3.004 
25 
3 聲 
3.317 
20 
3l 
3.004 
19 
3l 
. 3.442 
3 
23 
l\ 
3.100 
3i 
22 
3i 
5.442 
3 
l8 
3i 
3.225 
26 
4 
3-567 
3 
ai 
3i 
3.225 
2J 
4i 
3.692 
3 
24 
3 
3 聲 
3.317 
3 
22 
4i 
3.692 
3 
J9 
3i 
3i 
3.442 
3 
21 
4} 
3.9W 
2!- 
24 
H - 
4 
3.567 
3 
20 
4i 
4.028 
21 
3l 
4i 
3.692 
5 
20 
4! 
4.153 
2 ? 
19 
.4-} 
3.798 
分 
l 8 
3t 
4 含 
4.028 
23 
4 普 
4J53 
23 
4 
4¢ 
4.255 
21 
ItEMARKS. — A« upsetting reduces the strength of iron, bars having the same diameter at root of thread as 
that of the bar, invariably break in the screw end, when tested to destruction, without developing the full 
strength of the bar. It is therefore necessary to make np for this loss In strength by an excess of metal in the 
upset screw ends over that in tlie bar. 
The above table Ls tlie result of numei*oiH tests on flnisheil btira made ftt tlie Keystone Bridge Conii«uiy4 
Works in rittsburgli, mid gives proportions that will cfuwe the bar to break in the botly In preferunce to tlie 
upset end. 
The screw threads in above table are tlie FrauUin Institute standard. 
To make one upset end for 5" length of thread allow 6 〃 length of rod additional. 
