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Residential Joists Drafting Standard 3

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GaStruct

Structural
May 20, 2024
24
How do you all show joists for residential projects? I gained the majority of my experience in CT and NY and around there everyone shows the joists as harpoons. I am now practicing in GA and I am seeing most "architectural designers" (ie: unlicensed architects playing architect)drawing each individual joist on plan. This is a headache to look at to me but I am finding out that many contractors down here just cannot understand how to read my legend and figure out which way the joists go. Now I'm not sure if I'm crazy or if they're illiterate.

Here's how I have been showing joists for years with a legend included on every plan. Again, no problems before moving to GA!

Capture_eccsjb.jpg


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"Drawing" every joist is really not much effort if your using revit. In fact the process for modeling a joist system in 3D takes about 10 seconds. That doesn't mean you should show them ( there are valid points for not showing it mentioned in this thread for sure). To callout the joists I use the Joist callout function and click on the group and bam there's my harpoon. I will never go back to drawing out the lines for all of that stuff manually, it literally brings me dread to imagine drawing that harpoon line on a plan manually.

My take is I show all the joists and call them out explicitly then I don't have to think about how it might get interpreted. As long as the plan remains clear then its a win-win. That being said I'm also not afraid of more sheets, diaphragm sheets, shear wall sheets, etc.

 
driftLimiter said:
"Drawing" every joist is really not much effort if your using revit.
I don't use revit and it's still not that much effort.

If you work in a geographic area where the "harpoon" style is the norm and everybody already understands it, perhaps that's fine. Still, based on some of the responses above, I'm not so sure that's the case. I wouldn't want a builder looking at my plan to have to refer to a legend on another sheet to understand how the framing is oriented.

I like the simplicity of showing every joist exactly where it should be located. Drawing each one will often expose potential problems which might have been missed otherwise.

At the end of the day, the important thing is that the plans be clear to the people using them, however that is accomplished.
 
I use autocad and I just use offset command one by one and trim where ever the joists stop. It is pretty quick. But there is probably a way to do it quicker. Maybe use array command, explode, then trim. If we draw every rafter on the roof, I see no reason why we cant draw every joist on the floor.
 
gte447f said:
I usually prefer not to draw every joist like a kindergartener... just kidding everyone... please don't start throwing things... ;)
Ha me too. Makes the drawings hard to read. Also, then are you responsible when the plumber cuts your joist for the toilet drain that you missed?

This is how I do it...

J_uxwfe4.png
 
I don't mind the "harpoons" or arrows. As long as they're different for the joist spans and the joist runs. I've seen plans where they have arrows both directions. Then it's not always easy to figure out what's intended.
 
Doublestud - the array command, probably. Though I don't use it much.
 
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