BWP's and Rim Board Headers

[SDS]

2018 IRC...

Looking at R301.2.2.6 Irregular Buildings
...Item #3 Braced Panels over openings below.

It specifies it is allowed as long as you provide a certain minimum header size dependent on the opening size.

Can a rim joist header, as specified in R602.7.2 Rim Board Headers be used to satisfy the requirements of the Irregular Building section's Item #3?

 

[Joe.B]

I suspect you can, but probably not without engineering.

"Rim board headers supporting concentrated loads shall be designed in accordance with accepted engineering practice."

I would think that a braced wall panel would qualify as a concentrated load, at least during a seismic event. As section you're referencing (R301.2.2.6) is under "seismic provisions" I would be thinking of it that way.

 

[SDS]

I suspect you can, but probably not without engineering.

"Rim board headers supporting concentrated loads shall be designed in accordance with accepted engineering practice."

I would think that a braced wall panel would qualify as a concentrated load, at least during a seismic event. As section you're referencing (R301.2.2.6) is under "seismic provisions" I would be thinking of it that way.

But Item #3 of the Irregular Buildings section is in fact allowing a braced panel over a header, so my question is;

Does it matter whether the header is framed in the wall below or is a rim board header above the wall allowed to satisfy item #3, as long as the braced panel does not sit entirely over the opening below it?