I realize that this issue has been discussed at length and there are many threads on the subject. I skimmed some of the threads but did not read all of them.
Has there been a discussion of what is the liability of the SE is in the case?
“We had no idea the building was in imminent danger,”...
I have been reading some older posts on here. I wanted to see what the new consensus is.
I am old school and I guess my way of tracking revisions is by sheet.
As it is explained to me:
By sheet means that only the sheet that is revised gets a raised rev level. Some guys in the office don't...
I am trying to reverse engineer A tank foundation (mat on drilled piers) I have a soils report that states Av=0.14 and Aa=0.13. I am trying to determine the base shear that was used for the original design.
I am splicing 2'-0" onto the bottom of a 20' tall HSS 12x12x5/8 column. Bottom is idealized pin and top is a moment connection.
Our plan is to use a CJP weld to splice the column.
Application is moderate seismic.
Is any NDT required on the weld?
Ive been reading AISC and AWS, and i can't...
I am evaluating this connection and it has significant prying. The detail shows thick washers on the top side of the flange.
based on my understanding of prying, I don't see how this eliminates prying. If it does, how do you determine the thickness?
Does anyone have any experience with using...
Has anyone used a side-lap connection for a roof truss to a wall stud? Truss span is 40 feet.
I have a building that is CFS bearing walls. The ones I have done in the past had regular gable roof trusses. So we just set the trusses at 24" OC on top of the wall. We placed an extra stud under...
ACI-318-19 Section 14.5.1.7 states that h shall be taken as 2" less for concrete cast against "soil". Does anyone know if that means that if the concrete is cast against a compacted gravel base, you don't need to reduce by 2"?
AISI S400-15 Section E1.4.2.1(b) states "The nominal strength for shear, Vn, is based upon a screw spacing of not less than 4" o.c."
Does that mean that you cannot use the values for 3" and 2" spacing in Table E1.3-1?
I have seen details for control joints in flat slabs that have greased dowels or diamond dowels. I have seen notes to cut every other strand of WWF, cut every other bar, or stop the re-bars 2" short of the joint.
I have also heard other engineers stating that that is not required and that you...
I have a flat bottom tank and I am designing the foundation.
I seem to recall in the past being told that the maximum seismic foundation load on the tank comes from the tank being full, and therefore no sloshing analysis needs to be considered.
I am searching the ASCE-7 for guidance and I don't...
I have an aluminum extrusion that is a Tee section with the stem on top and the stem is actually a screw chase.
I am struggling with how to calculate the lateral torsional buckling of the section.
Does anyone have a good suggestion or a reference that does not involve solving a double...
I have seen a Excel Spreadsheet that calculates wind loading for ACSE 7. Can anyone direct me to the original source? I don't expect to get it for free and I don't want to download it from the Kervlakistan Hackers-R-Us website.
I am looking for a good aluminum member design reference. Does anyone own a copy of "Aluminum Structural Design" by The Reynolds Metals Company? Amazon does not have the look inside option for this book. I know RISA does aluminum design and the ADM has many example calculations, but we are...
I have an existing building in a moderate seismic area. The owner is making some minor alterations to install new equipment. I am referring to the IEBC and my interpretation is that if the seismic demand is not increased more than 10% in any lateral member, no seismic retrofit is required. (10%...
What thickness of warehouse slabs are you engineers out there using? I am just looking for a gut check, not an in depth discussion on the "art" of industrial floor slab design. :)
I am designing a floor slab to support a 20 kip axle load. I have used the the tired and true PCA alignment charts...
I am looking for a good reference to design bins and hoppers. I have a copy of ANSI/ASAE S433.1 "Loads Exerted by free flowing grain on bins".
But the document excludes mass flow hoppers. I think my hopper may be a mass flow condition. The sides are pretty steep. I have a copy of Gaylord and...
I am looking for information to design an exhaust stack for a chemical digester.
We have a chemical reaction that will exhaust 5700 cu ft. / min of gases. We are trying to determine the required diameter
of the stack to provide enough natural draft so that a ID or FD fan is not required.
I...
I am trying to determine the stresses in a bin wall. I have a copy of Gaylord and Gaylord "Design of Steel Bins for Storage of Bulk Solids". I am hoping that there is an expert out there that can answer a question for me. In example 5-3 the pv = density x depth, which is what I expect. But in...
I am just looking for some opinions on how other engineers deal with exterior mat foundations.
I have a cooling tower that is about 12 x 10 foot in plan. The frost line in our area is 30". I told the contractor to dig a 12x10 foot by 30" deep and pour a 3 foot thick mat.
I know that sounds...
