Search results for query: *

Thanks Mike, Pat and RacingAZ, I will follow your advice. "Structural engineering is the art of modeling materials we do not wholly understand into shapes we cannot precisely analyse so as to withstand forces we cannot properly assess in such a way that the public at large has no reason to...

Thanks MechEng, that seems to put my situation in perspective. "Structural engineering is the art of modeling materials we do not wholly understand into shapes we cannot precisely analyse so as to withstand forces we cannot properly assess in such a way that the public at large has no reason...

I started a new job about two months ago and did sign a non compete with my previous employer. My previous employer in Utah is fine with me working with the new employer, a company in California which does competing work, however, for different clients. Most non compete agreements in...

Thanks to everyone for the input, you've been helpful. The project completion date is too short (as usual) for us to get our own license in the state. I think based upon the comments I will consult a lawyer and go from there. "Structural engineering is the art of modeling materials we do not...

I am managing a project right now and we are in the need of another engineering firm to seal a set of drawings because it is in a state we do not have a license. My supervisor has asked that I have the engineering firm I found sign a non-compete agreement so that this firm does not take our...

Thanks to both of you. You have been helpful. I just talked to a local geotech and they use Tan(0.7*friction angle) once they determine the soil classification. "Structural engineering is the art of modeling materials we do not wholly understand into shapes we cannot precisely analyse so as...

PEinc: I have seen the 2/3 number before as well as using 3/4. Your two calculations are not the same, though. 2/3Tan(38) is not the same as Tan(2/3(38)). I think your second equation from the design book you quoted is correct, right? So the friction factor would be 0.47 and you would still...

ishvaag: What codes are you talking about that are conservative regarding friction? "Structural engineering is the art of modeling materials we do not wholly understand into shapes we cannot precisely analyse so as to withstand forces we cannot properly assess in such a way that the public at...

Has anyone ever used this before to calculate the friction factor for a spread footing? I have attached an excerpt from the Civil Engineer’s Handbook (Merritt). http://files.engineering.com/getfile.aspx?folder=40fa290b-010f-47e9-88a6-a6e7319a6e94&file=Frictional_Resistance.jpg...

JAE, it is a standard for patron directed amusement rides and devices. We are working with a company that is developing an amusement ride and I am assisting them with meeting this ASTM standard. BTW, I was unable to reach anyone on the F 24 Committee other than the Administrative Assistant...

That is what I noticed too, msquared48. You are right, it is a government publication, they seem to enjoy confusing us sometimes. Although, the reference is from an ASTM standard. I have called the ASTM F 24 Subcommittee and am waiting for a response back. They may provide me with a better...

JAE, it is referenced in the ASTM F1159-03, which is the current version of this standard (the 2003 version). SlideRuleEra, that is exactly what I found as well. There is no reference to "Revision Numbers". Here is the exact quote from the ASTM F1159-03: "Design timber structures in...

I have a reference from an ASTM standard which says to use the USDA Agricultural Handbook 72 for design of timber structures. The problem I am having is that it references "Revision 0". What version is "Revision 0" for the wood handbook? I would think it is the 1955 version, but would like to...

BAretired, I will look at the 3 guys idea, I think that would help. I would love to just use a guyed tower. "Structural engineering is the art of modeling materials we do not wholly understand into shapes we cannot precisely analyse so as to withstand forces we cannot properly assess in such...

In response to SkiisAndBikes: Thanks, I will check out the TSSA link. The standards that are out there are from the ACCT (www.acctinfo.org) and the PRCA (www.prcainfo.org), and no this is not the rodeo association. I have both of these and have reviewed them. There is not any real guidance...

In response to msquared48: Thanks, that is one option I’ve considered. The issue is that access is tough for pouring concrete and one option I am considering is using guy wires tied to boulders that can be set and placed behind the tree. Even with the guy wires the problem is that it becomes...

Does anyone know of any standards for using live trees in the design of a structure which carries people? It is for a zipline that would be used to carry one person at a time. I would recommend that the tree be load tested to 1.5-2 times the design load, but I don't think that is enough...