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This is a very interesting question that I admittedly haven't thought much about. Appendix 7 doesn't explicitly state that K =1 is used to determine the slenderness, but it does state that the columns are to be designed with K =1. Here's the quote: Section 7.1 - Members shall satisfy the...

That confused me at first, too, sandman, but I think the SFRS will be special shear walls on the level below the special moment frame. He probably shouldn't call them ordinary concrete frames in his sketch. I think he meant that the frame system transitions to a gravity only frame with special...

In my opinion you should reinforce the joint as a special moment frame joint. My reasoning for this is because the column has to be able to transfer the lateral forces into the diaphragm before they can be transferred to the special shear walls, hence the special moment frame ends at the bottom...

250 psf is typical for us as well. In maintenance laydown areas we go as high as 500 psf.

I'll be the first to admit that I'm no where close to being an expert on beam stability. That said, here's my opinion. I agree with those that say the unbraced lengths are 5' with the deck and 30' without. This is assuming that the end stiffeners are rigid enough to prevent end rotation. The...

I am writing a spreadsheet to calculate the capacity of single angles in compression based on the 9th Ed. ASD. I have a question about Example 11 on page 3-57 in the manual. Near the end of the example, on page 3-58, it says 'Using Table 3,'. Where is Table 3? I haven't been able to figure...

Sorry for the ambiguity of my post. Specifically, I saw this when reading about the distribution of loads in a braced frame structure. It was refering to taking the total vertical load of a structure and determining the load in a brace member by linear scaling of the force. Hope this...

I came across the phrase linear scaling when reading some material about structural analysis and load distribution and I have not been able to find out what the phrase means. Does anyone have a definition? I have asked a few people at work and they are not familiar with the phrase, so I am...

I am a fairly recent grad (2 years ago) and I just started working with a company that uses ASD steel design a lot. My training and schooling has all been in LRFD and that is all I have reference books about, so I was wondering if anyone could recommend a good book for ASD design? One book...