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Re: Jib crane impact factor

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That's not the point.

1. It's consistent with general structural design principles.

2. It more accurately reflects categorical load effects.

3. It lets you use one set of load combinations for all materials instead 
of having to account for different sets of them depending on what you're 

I learned ASD/WSD in school and used it several years thereafter. Then I 
switched. It was never a problem for me.

Going back because "everyone I know users the other method" would be 

William L. Polhemus, Jr. P.E.


On Jul 4, 2013, at 8:12 AM, "Gary L. Hodgson and Assoc." 
<design(--nospam--at)> wrote:

> ... I and others whom I know have never used Limit States Design (your 
> LRFD). There is no real savings in it except in building structures.

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