Can someone please explain to me what the last sentence in section 7.2.3 of ASCE 48-19 means? It states "Longitudinal seam weld shall have 60% minimum penetration (except as specified in Sections 6.3.4, 6.3.5 and 6.4.1 in this standard)." I understand that the exceptions listed require full...
Do the values listed in the NDS account for the amount of defects allowed for each grade of wood? Specially I'm wondering about waning. I have some 2x6 studs that were near capacity for the code required loading and one of the studs has substantial waning (section is missing from where bark...
I have been designing the steel and foundations for wind and solar substation across the country for 10 years now and am very familiar with the previous version of ASCE 113. We just got the new version of ASCE 113 last week so I'm working on understanding the changes. Our client for...
I have project in Texas where the concrete test revealed that the concrete temperature of at least one of the trucks was 98 degrees F during the pour. The contractor was 3/4 into pouring multiple large piers and decided to use the concrete to finish the pour even though the temperature exceeded...
I'm looking for recommendation regarding structural finite element analysis software for designing simple steel structures for an electrical substation. We have a client (an electrical engineer) that we have been designing substation structures and foundations for that is looking to bid on a...
We have been designing prefabricated aluminum decks for a local fabricator for a few years now. If you drive around any metropolitan area you have assuredly seen hundreds of these decks as they are all over mid-level wood constructed housing units. You know, the ones with the hanger rods at...
If Lpile is supposed to use working loads, which makes sense to me because foundation movement usually governs the design, should the NESC 250B case be considered without the overload factors? It seems like 250B is an ultimate load case given the OLF and I've seen published documents that refer...
I'm reposting this thread to this forum as I don't know that it will be seen in the industry forum.
I have some follow up questions to a thread that has been closed for a while as I'm looking at the exact same condition. The thread is thread593-417476: Column Embedment into Base Plate.
The...
I have a couple questions about designing base plates for substation structures. Can the base plate design method shown in ASCE 113 be used if column is an HSS and the base plate is open within the column for venting and drainage? I typically detailed 4" diameter holes for venting and drainage...
I'm looking for more information regarding the amount of force created by a short circuit condition that the structural steel of a bus support should be able to resist. I am a structural engineer and my task is to design the structure and the foundations for a substation. I have a copy of IEEE...
We are designing a stack foundation for an industrial power generating building. The foundation and anchor bolts are to be designed for a future 90' tall stack which I'm being told will be painted carbon steel. The owner will be installing a 50' stack for now that they are requiring be...
I have a footing that has overturning in 2 directions and I'm wondering about meeting the factor of safety requirements for overturning. I have the footing.xls spreadsheet from Alex Tomanovich which I've used in the past for non-concentric foundations and found to be very accurate. It appears...
I am designed a small mat foundation to support some substation electrical equipment in an area that has moderate seismic loads. The lateral seismic load applied to the center of gravity of the equipment is determined per IEEE 693 and is similar to the load resulting from ASCE 7. Do I need to...
I am designed a small mat foundation to support some electrical equipment in an area that has moderate seismic loads. The lateral seismic load applied to the center of gravity of the equipment is determined per IEEE 693 and is similar to the load resulting from ASCE 7. Do I need to include the...
The ASCE substation structure design manual has its own load factors and combinations which are lower than the ASCE7/IBC. I understand why they are lower but I'm wondering what legal grounds an engineer has to use them since the document is a guide and not a code. We work for an electrical...
The ASCE substation structure design manual has its own load factors and combinations which are lower than the ASCE7/IBC. I understand why they are lower but I'm wondering what legal grounds an engineer has to use them since the document is a guide and not a code. We work for an electrical...
