lexpatrie and jayrod12, thank you so much. Great insight! It's good to hear from engineers about what should be done. I could be missing something, but the first dimension was not called out anywhere. I learned that what I've meant to say earlier, is asking about the edge rib. I was mistaken in...
jjl317, thanks! Coming from a mechanical building background, I can understand how mechanical drawings are really diagrammatic/schematic in nature, and how much freedom the mechanical contractors were given to build the system. I guess, naively, I thought the structural side of the building was...
Just as further reference, is a picture from on-site showing columns #28 (right column) and #37 (left column), and showing joist systems (from right of picture to left) J25, J29, J34, and J38. You can see (what I think?) is a double-joist near the middle of the picture, and how the joists seem...
This is more or less a follow-up to my previous post (thread507-523158), but maybe understanding this point will help me understand the other point. On the one detail for typical joist construction for this project, I see that the first pan is variable dimension ('30", 20", 15" or 10" pans as...
SWComposites, that's what I would expect, but I found nothing. I think the answer is that the contractors back in the day were expected to perform some of the locating of the joists themselves on-site. I am attaching the full structural set of drawings to this reply so one can see for...
lexpatrie, the spacing is on the schedule at 37" center to center of each joist. I'm recreating part of the building in Revit, and I wanted to model the space more accurately. The joist spacing is given, but the dimension I highlighted in the first picture is not given. Does my question make...
Hey phamENG, thanks for the reply. The joist schedule only tells me the following: pan depth, slab depth, and the width the joist @ spacing dimension. For example an 18" thick joist below a 3-1/2" slab, with a 7" width @ 37" off center. The .pdf I attached to the previous reply shows pretty much...
Hey lexpatrie, thanks for the reply. J21 refers to the joist on the joist schedule. Check out the .pdf I attached with the snipped joist schedule items along adjacent to a single top to bottom 'run' of...
Hello all! Another question from a ME with little experience in structural engineering. For drawings from the early 1970's in the southeastern U.S., how were concrete joist spans dimensioned? I can figure the span length from the distance from beam to beam, but from the top to the bottom of the...
Does anyone here know if there are any useful tables (International Fuel Gas Code maybe?) or methods to calculate BTU or CFH loads from turrets in laboratories? Honestly, any design guide resources on determining natural gas loads would serve me very well. I'm at a loss when sizing natural gas...
Hello all, I've got another Revit modeling question as regards a structural footing. A note in the drawing (from 1968) specifies that:
"The maximum wall footing ste-off shall be 2'-0" vertical spaced not less than 4'-0" o.c. Footing step-offs are indicated on plans by the symbol...
Thanks for the guidance LittleInch. I've since updated our master spec in-house with some of this information! And [surprise] [conehead] haha, I'm sure that happened at least once or twice before here, if I had to guess. Based on a spool piece of black steel that just arrived to our job-site...
I think it stands for plate! I am attaching two pictures of the column and footing details with and without plates. Thanks everyone for pointing me in the right direction! This is why I love the Eng-Tips forum.
One of my customer recently insisted on using Propress instead of soldered Type L copper. I think it was run with primarily because of how quickly it could be installed. Is this kind of technology reliable and proven? I work on an old university campus, so ideally I like to specify products and...
I am trying to model the loss coefficient (Cv or K value) through a non-slam wafer check valve (as it's specified in my job). I see that there are a few different types of check valves that Crane's TP-410 paper provides loss coefficients for the following valves. I used a 8" size for the...
Good afternoon struct-e's. I'm looking at a schedule of columns and footings for a building built in 1968, and trying to model the footings in Revit. For the footings, one of the rows indicates the "DEPTH W/OUT PL." [Depth without PL] Does anybody know what this means? Piling maybe? I don't see...
Okay [bigsmile], so black steel ... is just steel that's gone through blackening (or generic term for who knows what type/quality steel!). It's interesting that you added, all screwed not welded connections, as our campus construction standards have typically specified welded schedule 40 black...
This is probably going to get me some links to other posts, mil-spec's and standards, but can anyone define the difference creation, use and alloy-wise between black steel and carbon steel? I've heard they are different, but as far as my understanding goes, black steel is just a kind of carbon...
Hey HVAC-Novice, thanks for the response. Yes, I mean a modulating control valve. The ePICV's that I have gotten spec'd from Belimo for a 6" pipe are around 5x the cost of a pressure dependent control valve (PDCV). I do agree in that PICV's in general are the way to go in terms of design, but I...
