481
OF ENGINEERING FOBMULÆ.
Riveted Joints. (W. R. Browne, ‘Proc. I. M. E.,’ 1872.)
S = Breaking strain in tons.
A = Area of rivet in square
inches.
d — Diameter of rivet, inches.
t =. thickness of plate, inches.
(1) Rivet Shear. S=KA.
K — 18 to 20 tons.
(2)i Crippling of Plate.
S = Kid.
K 40 to 43 tons.
— 2‘31 for equal strength.
(3) Bursting of Plate.
„ Ki L*
S7 d '
K = 38 tons, L = d, when
d = 2t. JL = -85 d when
d = If t.
(4) Tearing of Plate.
S = K«(b - d).
K ~ 18 fi>r punched and 22 tons
for dri lied plates.
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Diam. Pitch Strength
Joint. Riveting. : Holes. Covers. of ijftp, or of of Joint
I . 1 Rivet. Cover. Rivets. to Plate.
Lap Single Punch» d — 2t 3d 3d •55
,, „ Drilled — 2t 3d 3-Gd •62
Butt „ Punched 1 2t 6d 3d •55
Butt „ Drilled 1 2t 6 d 3-6d •62
b Puhched 2 lit 6d 3-25 d •57
.. „ Drilled 1 2 lit 6 d 3d •67
Chain. ZiKzag.
Lap Double Punched — 2 t 5id Gd 44 d •69
-J „ Drilled — .2 t 5d 5id 4<Z •75
Butt „ Punched 1 2t 11 d 12d 4id •69
- . „ Drilled 1 2t 10 4 11<Z 4d •75
Butt „ Punched 2 lit ll d 13 d 5id •72
„ Drilled i 2 lit lOd 12d iid •79
2 I