A=Area combined ring section in square inches = t (b + 1.56 YrE) + 2 lt,

I = Moment of inertia of Section Y-Y.

L= Length of one span in inches.

M= Bending moment in the ring, inch pounds.

N= Tension due to internal pressure, on section of ring, in pounds.

=

P: Pressure head in pounds per square inch.

Qs Weight of pipe shell in one span in pounds.

Q=Combined weight pipe shell and water in one span, in pounds.
S= Radial shear stress in stiffener ring, in pounds.

T = Direct stress in the ring exclusive of N, 'in pounds.

N

Total stress in outer fiber of ring = M + Α

Total stress in inner fiber of ring:

REFERENCE - BOULDER CANYON PROJECT - FINAL REPORTS, PART 5,- BULLETIN 5, TABLES NO'S. 3,4 & 6.

REV. 3-17-49

FORMERLY X-D-1108

106-D-37