## Building drift and diaphragm deflection limits

## Building drift and diaphragm deflection limits

(OP)

Where do I find some good information (with a picture preferably) on

1. Building VLLR drift limits

2. Diaphragm deflection limits between the MFRS.

I have design guide 3, but that all seems greek. What do they mean drift perp to wall? Which wall, the shearwall or the wall which is perp to this wall. I know you always hear h/400 for the VLLR, but why. Where is that written in stone, and why can a prefab building drift so much more.

Thanks for any help.

1. Building VLLR drift limits

2. Diaphragm deflection limits between the MFRS.

I have design guide 3, but that all seems greek. What do they mean drift perp to wall? Which wall, the shearwall or the wall which is perp to this wall. I know you always hear h/400 for the VLLR, but why. Where is that written in stone, and why can a prefab building drift so much more.

Thanks for any help.

## RE: Building drift and diaphragm deflection limits