I joists parallel to the exterior wall 5

[DoubleStud]

Folks, help me understand what exactly the blocking and the nailing are resisting. Thanks!

 

[TheDW]

buildings using I-joists that deep are governed by the commercial code

Ouch!

I always enforce it when asked, but because of stuff like XR250 mentioned I don't lose any sleep knowing it might be missing in some buildings.

 

[XR250]

XR250:
I disagree the wall gyp typically stops at the wall top plate, the ceiling gyp if connected through a nail block used for this purpose would be loading the bottoms of the I-Joist placing them in torsion which is unreliable.

The ceiling acts as its own diaphragm. This is how 99% of all houses are constructed (at least in the states and not necessarily with i-joists though)

 

[dauwerda]

XR250, I agree that is the result due to the way they are built. Personally, I am not a fan of using/counting on sheetrock for structural purposes, my preference is to have the blocking in place and not wonder if my sheetrock is structural when plumbing from the floor above leaks and turns the sheetrock into mush. In this area it is also very common to have unfinished walkout basements. They typically won't have the blocking or the sheetrock.

 

[XR250]

Personally, I am not a fan of using/counting on sheetrock for structural purposes, my preference is to have the blocking in place and not wonder if my sheetrock is structural when plumbing from the floor above leaks and turns the sheetrock into mush.

That's fair but what are the chances of that occurring simultaneously with a hurricane?
Pick your battles - I suppose. It is not a failure mode I have ever observed in my practice of 26 years - except in a basement with soil pressures.

 

[phamENG]

That's fair but what are the chances of that occurring simultaneously with a hurricane?

The plumbing leak is pretty low, but a roof leak would be extremely high. That's why I don't count on it for shear walls unless absolutely necessary. The highest chance for lots of water in the house (roof damage or flood) tends to coincide pretty closely with the extreme design wind event...

(Extreme is relative)

 

[jerseyshore]

If you want to deep dive into every single element and connection in a house you'll go crazy and never fall asleep at night. There are some situations where this type of blocking becomes slightly more critical, but in 99%+ of US homes this blocking doesn't exist and all the houses are fine.

 

[GEE8B]

I use a similar detail in my designs. Out-of-plane restraint for lower story.

 

[JStructsteel]

Thats an intricate detail. I usually call out with a note, unless a special circumstance .