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hi what i have been told is that for an epoxy agent the concrete will fail first but not necessarily so for an sbr. we are doing QA pull off tests and only achieving 150 psi. i'm looking for vales of pull off where we should expect the original slab to break. any ideas? is it just the...

We are investigating the bond of a thin high strength concrete screed 2" to existing concrete floor using an SBR. Prep includes saturating the floor and grit balsting to expose aggregate. using pull off testing, can anyone tell me what bond strengths should be achieved? Also, at what strength...

Concrete sway frames Im new to staad and need some advice on modelling the above as lateral stability elements for a 4 story building. I have 6 frames I can use for lateral stability at about 10 m centres. Deflection limits are h/500 Should I use cracked or modified uncracked section...

Hi Guys Thanks again for the replies. I am quite familiar with general domestic and commercial sewer design (both foul water and surface water for residential, offices, shopping centres etc). What I am looking for is a reference that is aimed specifically at industrial buildings. Something...

Hi Guys Thanks for all the help. Can anyone recommend a good source for 'effluent' pipework design? Hi Runoff, do you mean pvc or upvc? Has upvc got good chemical resistance? Also, why use two different materials? Hi Bimr, what is I/I - not familiar with this term? Thanks again to all!

Hi Guys Our firm have just been awarded a small extension to a process facility. Its our first job of this type where we have been asked to do the Civils/drainage. The existing underground drains taking the process waste are clay pipes. Is this usual? The existing facility is only 10 years...

Hi Desertfox and all others who have replied. Many thanks for your input. The design went into fabrication today so no turning back now. I'm satisfied with the design. Its not something that is covered very well in our code. I think I'll drop a note to the Institution. Thanks again MH

Hi all. I didn't anticipate that this q would generate so much interest. Firstly, Zx is the elastic section modulus in the uk (where I am based). I was not aware that it was reversed in the US. (you say tomatoes etc...) Hope that clears that one up. Secondly, I am assuming that the glass does...

Structural EIt Re your earlier point. Zx does not imply full plastic moment, rather full elastic moment. Add this to the fact that I intend to reduce the allowable stress due to the cross section being slender, i think I am going down the correct road. i reason it this way: Lateral...

Hi went to the cads demo. Looks very user friendly and seems to be 'all singing/all dancing', however, its very new. I for one wont be buying it for at least 18 months until all the bugs are eliminated. Still quite a head turner in a neerdy kind of way!

Thanks for the reply. the 250-150 is on the vertical. I have decided to use the basic section properties of Zx but reducing the allowable steel stress due to slenderness. I have also talked the architect into a cable tie at the end of the cantilever and a partial torsional restraint at the...

Hi Thanks for the replies. I have found all comments useful. From my own use of demos and from a lot of research heres what I have come up with. If you can add to these or correct me if i am in error i think a host of engineers can benefit. I understand its all subjective, however, for my...

Hi Has anyone had any experience designing flat plate as a beam? I need to design a tapered flat plate (250mm x12mm wide tapering to 150x 12mm wide) cantilever beam supporting a glass canopy. The beam is lightly loaded but has no lateral restraint. I cant seem to find any design guides or...

There is also a BCSA publication on the Barbour index called : Beams with web openings. Regards

What was the last version you tried? I only have experience with V20. It seemed ok, however, there is only so much you can get through on a trial. That is why I am looking for opinions on this site.

prs consultant do you model the whole building in ram or just manually input the loads? what package do you use for overall stability checks? Thanks MH

I did. The most recent one it came up with was a review carried out in 1998. Have they stopped doing the review?

Can anyony provide a link to the most recent AISC software review? Thanks MH

I'd say you could use 0.6pyAs similar to steel shear capacity.

Patswfc Thanks for the reply. I heard about the presentation. In fact the Ram concept sales guy claimed that he was the only one to finish the design problem set at the presentation. Is that true? He also went on and on about Robot being the slowest. Again, was that the case? Did any of the...