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A contractor is proposing telescoping their temporary casings for our drilled pier. Several of the drilled piers are in uplift, more so than the weight of the concrete.Everything I have found about telescoping the casings has this line: "This procedure is most often used for drilled shafts that...

Right, 2k axial load total. 3k-ft is in either axis non-concurrently, it's a moment from wind loading.

I'm looking to put in a footing or pier for an equipment support. Loads are very small (about 2k axial, 3 k*ft moment). I've got some old boring logs and the area I'd like to put the footer is in miscellaneous fill. I was hoping to use a 5'x5' (or smaller) footing or 3' pier setting at about 5'...

Yes there are other loads that justify the depth. 7500k-ft moment and 89 k shear. Their supplemental calculations do show the increase in weight for the new foundation, and with safety factors it still barely passes. Is this industry practice? Are there any resources that you know of that go...

An outside engineer firm is proposing a 10' diameter by 49' drilled shaft in soft clay soil. Using the geotechnical report, the axial load resistance is 266 kips. The pole supported has an axial load of 58 kips, but the foundation alone weighs 577 kips. This raised some flags for our engineering...

An outside engineer firm is proposing a 10' diameter by 49' drilled shaft in soft clay soil. Using the geotechnical report, the axial load resistance is 266 kips. The pole supported has an axial load of 58 kips, but the foundation alone weighs 577 kips. This raised some flags for our engineering...

@BUGGAR, I also work in the utilities, we use this design a lot due to galvanizing fluids and water drainage. Do you have any examples of on to calculate the strength of this connection. We've never had one fail but going forward and making this design "standard" I want to be certain on how...

Yeah we use this design on leveling nuts to allow water to drain and also for ease of galvanizing. Using the bend line method the plate is of adequate thickness, but I'm still not 100% confident about this design. The bend lines don't take into account that there is a significant reduction of...

A legacy practice of my engineering group has been to cut a hole in our base plate and embed an 8x8x1/4 HSS column 5/8" into the plate. The new manager wants detailed calculations on each structure, including base plate design. It is my understanding that the individual that detailed our base...

As seen in the example attachments, several engineers in the utility industry (where members experience significant moment/torsional loading) believe the use of stiffeners assists the overall structural design. It is believed, on the other hand by myself and few others that stiffeners do little...

chris3eb, yeah it goes all the way through, the section view is confusing and I think should be revised.

KootK, we do need a hole for galvanizing draining at least. I'd like to ultimately get rid of this design to reduce labor costs, just wanted to know if there was anyone out there that utilized a similar design or has any ideas so I could determine its strength. BUGGAR, I think ours is like how...

No grout bed, we use leveling nuts, the plate rests 2" above TOC. In some cases we do have utilities running up the inside but not for this structure. This structure is for supporting rigid aluminum pipe (conductor,I'm in the substation group for the utility). It is a 2 column structure with a...

A legacy practice of my engineering group has been to cut a hole in our base plate and embed an 8x8x1/4 HSS column 5/8" into the plate. The new manager wants detailed calculations on each structure, including base plate design. It is my understanding that the individual that detailed our base...