# Lifting lug calcs.xls

Rating:
86

### Description

Check lug shear stress.

Check Bending and tension stress.

Check bearing stress.

Check weld size.

Calculation Reference
Machine Design
Strength of Welds
Design of Lifting Equipment

### Calculation Preview

21 Mar 2011
21 Mar 2011
File Size:
39.50 Kb
489
File Version:
1.0
File Author:
Steve Haberli
Rating:
86

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a.attia 3 years ago
The equation seems appropriate. My concern is the coding in the excel spreadsheet in which leaving out the parenthesis makes a significant difference.
amrtarek3010 4 years ago
nice
cstrain 12 years ago
I don't know if it is addressed in this thread, but G16 has an error in it regarding the calculation of the horizontal component of the load based on theta. I believe the equation should be G18*cos(G17*PI()/180)
I am sorry pgrahn I thought it was a question only relating to cell D59 regarding the combined stress but I now realise the question relates to cell D31 and I must say I am a little perplexed too. The first two terms seem fine but I am not at all sure what the third term in the equation is doing. To my mind there seems to be confusion between the resultant force Fr and vertical and horizontal components Fv and Fh. I hope that the author shaberli can shed some light on the calculation but I would be extremely cautious about its use in my own calculations. There are many other lug calculations on the site with good ratings and feedback perhaps you should take a look to them?
pgrahn 12 years ago

The equation seems appropriate. My concern is the coding in the excell spreadsheet in which leaving out the parenthesis makes a significant difference.
Without the parenthesis in the denominator the numerator is only divided by "W" and not "(W*(t^2/6)).
The author may have multiplied t instead of squared t as well.