Fillet weld longer than 100 times the weld size in length 2

[Bhoffman]

In the Thirteenth edition of the AISC Manual, page 8-8, under Available Strength the book says:

"For a fillet weld less than or equal to 100 times the weld size in length, the available strength, Rn, may be calculated as follows:"

The book then gives the familiar equation for ASD design (Rn/Omega = 0.928DL), however, I cannot find what provisions/equations there are for a weld longer than 100 times the diameter.

For a 3/16" fillet weld, a length of 18.75 is the maximum for the equation, but welds longer than 19" are very commonly used around the office. Can anyone give any guidance on how to find the available strength of a fillet weld greater than 100 times the weld diameter? Is using the equation above a conservative approach?

 

[TLHS]

You can do it, but have to reduce the capacity of the weld.

This document on the topic should give you more insight:

http://www.jflf.org/pdfs/papers/design_file4.pdf

 

[Bhoffman]

Thank you TLHS. The article was very helpful.