Study of the above computations shows that the rivet pattern is satisfactory.
- Design the splice plates
To the left of the centerline, each splice plate bears against the left half of the rivet. There-
fore, the entire load has been transmitted to the splice plates at cc, which is the critical
section. Thus the tension in splice plate = ^(99,00O) = 49,500 Ib (220,176.0 N); plate
thickness required = 49,500/[22,000(7)] = 0.321 in (8.153 mm). Make the splice plates
10 x 3/ 8 in (254.0 x 9.53 mm).
DESIGN OF A PIPE JOINT
A steel pipe 5 ft 6 in (1676.4 mm) in diameter must withstand a fluid pressure of
225 lb/in^2 (1551.4 kPa). Design the pipe and the longitudinal lap splice, using^3 / 4 -in
(19.05-mm) rivets.
Calculation Procedure:
- Evaluate the hoop tension in the pipe
Let L denote the length (Fig. 57) of the repeating group of rivets. In this case, this equals
the rivet pitch. In Fig. 57, let T denote the hoop tension, in pounds (newtons), in the dis-
tance L. Evaluate the tension, using T = pDLI2, where/? = internal pressure, lb/in^2 (kPa);
D = inside diameter of pipe, in (mm); L = length considered, in (mm). Thus, T =
225(66)Z/2 = 7425L
FIGURE 56
Main plate
Splice plate
