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..."The belt, if sufficiently connected to the leg, would indeed cause the leg to act like 2 shorter columns - but, that does not mean that the whole structure is necessarily more stable."... Thats basically what I was getting at several posts back. I've got a better picture now of...

Rowe, I wasn't thinking of a horizontal column, this makes more sense with what ishvaaag said. Earlier today I was looking at the same link you posted, in my case though it doesn't really help. I do have my AISC books, both ASD & LRFD. I'll take a look at the section you mention. The PE we use...

Thank you for the quick responses. Given the example beow, this is my understanding of the issue: Lets say I have a simple structure sitting on a concrete pad. All the steel is 4x1/4 square tube. On top the columns are welded to the steel deck. Down on the ground the each columns is welded to...

Let me first say I'm by no means an Engineer, however I am involved to a degree in the design process, and in the end everything is stamped by one of our PE's anyway. Now my question: In looking at the Euler formula for determing critical loads in columns, I see that there are several end...

Speedy, That was a good link. As i figured coming up with a time is one of the more difficult variables. Looking around the web I came across an example of a duck colliding with a passenger plane. They figured a 12,000# impact load from a 1# duck based on the velocity of the airplane being...

That was a miscalculation on my part in the above example, I just realized I didn't take the square of my result before dividing. The results I got would be 2020# at .01 secs. This just doesn't sit right with me. Should I be adding these values to the initial 1200# to get a total load? I'm...

Some time ago I came across an equation for calculating impulse of a falling object, given its mass and how far it falls. the equations were: Velocity: v^2 = 2gH (I'm curious how this was derived) Impulse: J = m(2gH)^1/2 What I was interested in was estimating the forces generated by a...

Thanks for the quick reply. After reading your solution, it became clear that this is nothing more than a 90º lever problem as far as tension is concerned. Thanks for making me see the light. JD

I use simple wall brackets to support piping, etc... that usually consist of a rectangular tube welded between (2)lengths of angle (somewhat like a gusset connection on each side). The other toe of each angle (the one not welded to the tube) is drilled with 2 holes for mounting to the wall with...

I base most of my fluids system designs from Camerons Hydraulic and Crane Paper #410, neither of them list any data for friction factors in stainless (304,316L) tube. Does anyone have a reference for this info, or gathered any empirical data themselves? I'm mainly interested in numbers for...

Hmm... I had thought there would be another reaction other than Ray and Rby which would be Ma. From your post it seems like you indicate there is not, which does seem reasonable now that I've thought about it, there is nothing keeping the end from rotating, and there is no horizontal load, so I...

Hello all, I've got a beam design issue that I'm fighting with. I'll state the general scenario, then get to my question: I've got a horizontal wide flange beam hanging (bolted) to (2) horizontal sqaure tubes that are 48" on center. The beam extends beyond one connection and has a point...