Roof diaphragm design at different elevations

[NewbieStruct]

I have a building that consists of basically two tenants.

One tenant has a sloped roof (1/4" per foot requirement) while the other wants a hip roof with (2.5" per foot). At school, I was taught to take these two tenant spaces as two different buildings. I do have a interior wall that separates the two buildings. This wall is to be the interior shearwall. I will be designing it for the loads from both the buildings (spaces).

I was wondering how would you design the shear transfer from the hip roof to the lower flat (very small slope) if there wasn't any wall present.

 

[BAretired]

It would have to be a continuous diaphragm with a couple of bends in it.

BA

 

[msquared48]

And a lot of blocking...

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

 

[UcfSE]

Are the elevations different where the two diaphragms meet, conceptually?

 

[msquared48]

From the OP's post, yes.

"...the shear transfer from the hip roof to the lower flat..."

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

 

[UcfSE]

If the elevations are different, I would provide a structural frame, or frame supporting a short intermediate wall, to gather the diphragm forces together for transfer to each other, unless the frame could be part of the LFRS.

 

[NewbieStruct]

Thanks. I will go and use a structure frame to transfer the diaphragm forces if I come across this condition.