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Pipeline bearing stress over supports.

Pipeline bearing stress over supports.

Pipeline bearing stress over supports.

(OP)
Can anyone elucidate me on the equation for bearing stress of onshore pipelines over the supports?  The equation I have is missing a couple of signs and I am not sure which signs.  I have been unable to find this exact equation in the ASME B31.4/.8 Codes.  Any help will be appreciated.

RE: Pipeline bearing stress over supports.

One location for that equation is in AWWA M11-2004 equation 7-1; page 72

Scs = k[P/(T^2)]ln(R/t)

where k = 0.02 - 0.00012(A-90) [contact angle factor]

RE: Pipeline bearing stress over supports.

Roark 7th Edition, Table 13.3, Case 8 will give good fundamental guidance.
MW Kellogg, Section 2.3 will also add a bit

...and if you could get your hands on "Tubular Steel Structures, Theory & Design", by MS Troitsky, theres a good section on support of above-ground pipelines. But also largely references the above.

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