If the seismic response coefficient (Cs) is calculated per ASCE 7 12.8.1.1, where is it allowed by code to take a .7 reduction if utilizing an ASD approach?
And if I do utilize that reduction, am I to input the reduced seismic load into the load combinations for ASD in 12.4.2.3, which reduce it...
I have a 10" mat foundation with #5 bars 16" c/c top and bottom - anybody know of any reference documents on how to detail the contraction joints for a mat foundation? thanks in advance.
I have a 10" mat foundation with #5 top and bottom 16" c/c supporting a 5-story cold formed metal frame dorm - any thoughts on how the underslab plumbing should be addressed. The mat has been modeled in RAM Concept - and I'm showing a worse case applied soil bearing pressure of around 2000 psf...
I have a client who has another building on campus where the interior slab on grade detail was totally floating and there is significant amount of floor finish cracking around the perimeter.
They really want me to tie the simple 4" slab on grade into the fdn wall. There is 8" masonry above the...
I recently rejected a LW concrete submittal becuse it came in a 120 pcf, and my spec required 115 pcf max. The contractor just called me to say that the supplier assures me that if they mix it at 120 at the plant - by the time it gets/delivered/placed it loses about 6 pcf. Anybody ever hear of...
Knowing that you will be explaining it to a structural engineer with limited knowledge of geotech - When I see "running sands" noted in a boring log: What are they, why do the slow down borings, and why can they be blamed for inaccurate blowcounts?
Thanks for any input, i've never heard of...
I have a big W33 with quite a bit of load on it. The W33 is at a skewed angle and it turns out that they had to heat the shear tab in the field and bend it (between a 1/2" to 1")to install the beam.
Does anybody know a reference to see if this is acceptable? Any other thoughts on field...
The new New York State code doesn't specifically bullet "mechanical rooms" in their minimum live load table in Chapter 16.
Any thoughts on this, or where I can find it?
Thanks,
2 story irregular shaped steel frame structure in upstate new york.
I have two interior columns about a foot apart with an expansion joint between the two. I'm tempted to put them on the same spead footing...
As a general question, what are your thoughts on expansion joints being carried all...
I've been out of the soil testing end of the business for about 10 years and I was just sent a report to review that had site info based on these tools...what are your guys' thoughts on Pocket Pentetrometers?
Where would you be comfortable and not comfortable using them?
thanks,
I've been informed that I have to design a site for "first flush" of the initial runoff from the parking areas. I'm having trouble finding info and design requirements on this topic.
Does anyone have any helpful direction for me?
Good afternoon fellas,
Often times I run across specs that call for the top 6" of footing subgrade to be compacted to 95%.
As a structural engineer who doesn't have the full soil knowledge of a geotech this makes no sense to me. This requires a proctor to be pounded which I also feel...
I always have trouble assuming an angle of friction for soil given a thorough soil boring log, and feeling comfortable with it. Without a good feeling about that, its difficult for me to use Terzaghi's Bearing Capacity Formulas.
Can anyone offer advice on how to develop an accurate angle of...
