All calculations have been updated to most current materials characteristics and designs available in the market. Also, new chapters on negative skin friction, pile driving, and pile load testing have been added.
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Practicing Geotechnical, and Civil Engineers will find in this book an excellent handbook for frequent consult, benefiting from the clear and direct calculations, examples, and cases. Civil Engineering preparing for PE exams may benefit from the extensive coverage of the subject. Show less. View More. Back to Table of Contents. Johnson, Roger P. Open Share Save.
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View Section, Front Matter. View Section, List of Figures. View Section, List of Tables. View Section, Table of Contents. View Section, 1. Site Investigation and Soil Conditions. View Section, 2. Geophysical Methods. View Section, 3. View Section, 4. Foundation Types.
View Section, 5. Pile Types. View Section, 6. I grew up using both sets of units.
As soon as you spend an extended amount of time in one system, you kind of loose a feel for what is reasonable in the other set. At the end of the day, we are engineers and we should be able to work with either set of units. I currently have a good feel for what works in imperial units, but were I to change locations and begin using metric, I'm sure it would just be a matter of time before I developed that "feel".
And please stop the "you don't have to keep dividing by That's about as irrelevant as the argument that you have to check "a whole other set of load combinations to check deflection if you use LRFD". Why is "you don't have to keep dividing by 12 and 8" irrelevant? It's an additional step or two that is a potential source of error when doing hand calcs.
But there are clear advantages, seen by most of the world, for using a decimal measurement system to go with our decimal numbering system. I've lived in both systems too daily life as well as calculations on paper , and the advantage of SI is abundantly clear. On the other hand, the U. Economics will drive it, and the change is happening already, albeit at a glacial pace. There's no point in lecturing engineers who have no choice as to which system to work in that they ought to be using a different system.
It's irrelevant because if you make an error converting from feet to inches, you shouldn't be practicing engineering. If you the "royal" you, not you personally can't handle a single conversion, I suspect your work is littered with incorrect assumptions, bad judgement and mathematical errors anyway. I don't think being able to "handle" a feet to inch converstion is the point. Additional steps in any dimensional analysis are sources for potential calculation error.
I think every engineer having worked with Imperial units has made this type of common blunder at one time or another. Of course, there are always those engineers that don't have erasers on their pencils and feel compelled to convince everyone else to remove the delete and backspace keys from their keyboards since they are so obviously superfluous.
Respectfully, one of you should start a separate "which units are better? JKStuct You are correct indeed. My apologies. Here's another ENG-Tips thread on this subject from Back to the OP: RE: point 9 - good ground checks When checking the preparation of the sub-grade for a slab, road, etc, take a golf ball along, and bounce it as you wander around the site. You don't have to throw it down hard - just casually bounce it in rhythm with your pace, just as you might while walking along a footpath.see url
Ruwan Abey Rajapakse
Whenever it fails to bounce back up to your hand, mark the spot for compaction testing. YS, It is a good list I will pass it around the office. Although Item 9 is interesting we basically design for soil types and their relative bearing capacity and later confirm during excavation.
For larger projects we insist on Geotech report. Very interesting post. Sorry to be a spoiler of a wonderful party. Rules of thumb make good starting points. Then run the numbers. They also make good sanity checks after the numbers have been run.
I think we often assume everyone's going to be rational and run the numbers, but that's just not always the case. It's good to have someone actually say it. One more from my experience: - Retaining walls should be attempted with "traditional" dimensions first, and make every effort to correctly size and balance the heel and toe. There are good reasons why these shapes toe to heel from 0.
Stability, sliding, etc are easy to satisfy with an oversized heel or toe, but the strength of these members will be very difficult to achieve. Cheers, YS B. Depends a lot on the type of structure, and in most cases, I would say it is overly conservative. Most of my serious design stuff ups have begun with the senior engineer saying "This is straight forward, no need to think about it, just get to work. SDZ, Bingo, it usually starts like that.
Pile Design and Construction Rules of Thumb (2nd Edition) - Knovel
I must tell you that good mentoring is hard to find, you just have to be really lucky. Direct beschikbaar. Verkoop door bol.
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