Interior Wind Loads 3

[DHKpeWI]

I am designing a large paint booth (60’x22’x21’) to be located inside a large enclosed industrial building.

I read an old post on this forum that suggested that the 10 PSF minimum wind pressure (IBC 2006: 6.1.4.1) is to be used for an “indoor” structure. This seems very conservative, and I cannot find justification for it in ASCE 7 or in IBC 2006. The old Wisconsin code required a 5 PSF wind load for interior structures, which seems more reasonable, but this provision does not appear in the new codes. Because this structure is in Wisconsin and because it is very light, a 5 PSF wind load would be substantially larger than the seismic load.

What do you think? What do the codes require for an "interior" structure?

 

[JedClampett]

Check 2006 IBC Section 1607.13. It looks like 5 psf is required unless there's something special happening (seismic, internal HVAC pressure, etc.).
It's not really a wind load, but that seems to be a logical justification.

 

[Lion06]

I might consider using the interior
portion of the MWFRS pressure.

 

[DHKpeWI]

Thanks guys!

 

[paddingtongreen]

It used to be 5psf for firewalls

Michael.
Timing has a lot to do with the outcome of a rain dance.

 

[Ron]

Since your building is "industrial" it is probably designed as "partially enclosed". Considering that, use the interior pressure as your design criteria, but as ASCE 7 notes, not less than 10 psf for any component or cladding.

 

[msquared48]

Higher than 5 psf is adviseable for bathroom enclusures.

Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask

 

[DaveAtkins]

5 psf is adequate, unless the paint booth must be designed for an explosion.

The 10 psf minimum component and cladding load is for exterior walls.

DaveAtkins

 

[DHKpeWI]

Thanks to everyone for your help!

 

[BAretired]

It depends on the situation. Consider a carwash facility with front and back doors, either of which could be open or closed at any given time.

With two adjacent bays, the windward door is open on one while the leeward door is open on the other. The partition between the two units is subjected to the full positive pressure on the windward side plus the full negative pressure on the leeward side.

In such a situation, a pressure of 5 psf or 10 psf on the interior partition would be woefully inadequate. Such a partition may be more critical than an exterior wall.

BA