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I would say none. From your first link there appears to be different chambers between each "lintel"; each having it's own name. It appears as though there only purpose was to provide different chambers. --- Andrew

You must compact the soil. If you don't you risk settlement issues later. The compacted soil will actually help distribute the load outward. --- Andrew

Thanks!! --- Andrew

oijammu, That's interesting!! I hadn't heard this before. Do you know of a source where I can read more about this?? Thanks! --- Andrew

whyun, Do you know what the reasoning is for not allowing J bolts?? This isn't an area I work in often but I'm curious to hear the reasoning!! --- Andrew

Thanks to all!! This gives me a few more options to look at! --- Andrew

I can drill the dowels. My problem is if I drill deep enough to acheive my required strength; the embedment depth will violate the depth allowed for my edge distance. If I drill ONLY deep enough to satsify the edge distance requirment then the strength is inadequate. vmirat, How do you...

Background: I'm designing a concrete member (door jamb - 8' tall) to support a flood gate. The concrete door jamb will be oreinted vertically and will be doweled into an adjacent wall. Then, so I could sleep at night, I was also going to notch the top and the bottom of the support (into the...

Thanks everyone for the responses. dlew, your e-mail was very helpful and gave me the exact equation I needed to verify my work. JAE, my maximum stress is just above 25psf, which would indicate that my solution is less conservative then yours, that's good :) Probably just depends on which...

dlew, If you could send me an e-mail of one of the pages from EITHER of those books would be great. That would give me another check of my answers. My e-mail is: lundy@dmww.com My current equations came from from "Principles of Foundation Engineering" by Das and the "Civil...

Greg, Thanks for the response. In your equation you listed above what is "k" and what is "m". I assume "k" is spring rate...if so, what units is it in, lbs?? TIA!! --- Andrew

Previously I had asked the effect of an exterior surcharge loading (placed on a SOG) and what it would produce for horizontal loads on a basement wall. The last loading was a uniform loading and I got a lot of great comments. As "luck" would have it my employer has changed there...

Can anybody provide general info on spring rates?? Good links on the topic?? I'm curious as to know how they effect the cars handling and how they are considered when designing a suspension. Just looking to build up my knowledge base on the subject. TIA!! --- Andrew

RMPE, According to "Concrete Floors on Ground" - PCA: Assuming: Load=20000lbs fc=3000psi Slab Thickness = 10in CENTER OF SLAB LOADING MOR=7.5(fc)^1/2=410psi (ACI-318) 8x8 Base plate (64sqin) Allowable Bearing Stress: 4.2(MOR)=1725psi...

Hilti has some nice resources on this. A downloadable program (although I think it's only good for 30 days??) and a lot of technical data sheets on the products offered. To Ingenuity: Here's a link for a program with ETAG guidelines...

Thanks to everyone for the great responses!! --- Andrew

To: haynewp, Using the procedure you suggested (in ACI 9.5.2.3) I'm getting a ridiculouly low moment and allowable deflection. This seems like a great idea but it's not working in this case (or I've made, yet another, calculation error :-)). I'm getting such a low moment that the slab would...

No, there is a dead load being added to the beam that increases the deflection of the beam. Furthermore, I can't find anything in the construction plans that states the beams are cambered. They could be cambered but I'm figuring it as if they are not. Thanks for the reply. --- Andrew

I'm looking for a "rule-of-thumb" for steel beam deflections. I have looked in LRFD and found the L/360 for Live Load (LL) deflections but I can't seem to find anything for Total Load (TL) deflections. I've also searched the archives and nothing came up that applied to what I'm...

Thanks, Got my Nelson booklet on the way. Too bad that section didn't make it in ACI 318-99. I will have to add those two books to my growing list of books to buy!! :) Thanks again everybody, --- Andrew