Old version of Roark's 1

[reichertc]

I have come across a reference to a formula that I can't track down. Specifically Roark's Formula's for Stress and Strain, 4th Edition, Page 354, Item s(34).

I have access to a 5th edition and a 6th edition. Anyone able to tell me the equivalent in one of these editions?

Thanks in advance...

 

[israelkk]

It is the same as problem 21b table 35 on page 557 5th edition.