I've come across this as well. It's a drastic difference in design outcome. I've contacted Hilti about this in the past and they simply stated that ACI doesn't provide enough guidance on this issue and as a result, use the conservative approach from European technical guidelines.
Sticksandtriangles - I haven't found out yet. I'm assuming the same engineer that designed the micropiles, but who knows. That will probably be the next surprise.
Rabbit12 - well.....thats another discussion. Honestly, I've become very good at standing my ground and just being more stubborn...
JLNJ - Not sure I follow. The contractor and owner are separate entities. The owner should hire a third party for special inspections, but they won't, as usual.
darthsoilguy2 - I agree 100%. This happens ALL THE TIME in my position. There are numerous headaches when dealing with customers in the coal / aggregate industry, MSHA (who essentially chases out code enforcement), and a contractor who prides itself in "designing" projects without the aid of...
EngineeringEric - I've been in that scenario too. In this specific case however, currently BOTH the foundation design and building design are being treated as component design (both were handled by someone other than me). It doesn't seem to make much sense for me to enter into the picture as...
EngineeringEric - Is this delegated design just handled through contractual means? That makes sense to me, as long as the state laws (WV) don't dictate otherwise. It's laughable, but here's how it works here.....the project manager with the parent company(who isn't an engineer of any kind, nor...
Sounds pretty cut and dry. That was my suspicion. I'm just building my case for when they say "well it's already stamped...whats taking so long?"
Correct me if I'm wrong, but a fairly lengthy review time should be expected, right? It probably wouldn't be equal to a design from scratch, but...
I'll try and keep this short.
A contractor was awarded a project involving a metal building ("pre-engineered"). The design of the building frame was subcontracted to a metal building manufacturer, and foundation design (micropiles) was subcontracted to a drilling company, who subcontracted the...
Isn't it a bit difficult to have frictional resistance when uplift is present? I typically allow partial uplift for wind conditions, but partial uplift is limited by the bearing pressure produced by the reduced footprint.
The project specifications (which are based on ACI 350 largely) require a static design condition where the groundwater level is assumed at the top of the tank (1' above final grade). This requirement is for both buoyancy requirements and strength checks. For such a condition, you're...
The tank is buried it's entire depth (20'). Soil is generally a silty sand (SM). Attached are my WIP calcs for the ACI 350.3 procedure. It seems odd that ACI 350.3-06 doesn't address it directly, at least from what I can...
I guess my question is, are dynamic lateral soil pressures typically ignored in these designs? It seems like the overwhelming majority of the lateral force would be generated through the effects of the contained liquid and concrete mass.
I'm designing a rectangular concrete tank and I'm working through the seismic loads per ACI 350.3-06. I have the various dynamic forces calculated from Section 4.4.1.....Pw', Pr, Pi and Pc. What is stumping me is the consideration of "Peg" in the base shear calculation. "Peg" is the lateral...
The states that I'm dealing with (MD, WV and VA) do not require that the "managing agent" be a part owner/officer of the firm. That option exists, and is reserved for businesses that meet the definition of "professional firms" (which carries additional requirements), but for a general business...
The tricky part is that I don't know for sure what other services are being offered. All I know is that management has taken the position that I don't need to know all of their dealings. That seems wrong, but I don't know for sure. Seeking third party legal advice.
