it could have been the sheet rock, insuliation, anything we he wanted but seems like we're dealing with the detail from the change of permit and without that i can't tell you what the difference is. i would only be guessing. >> but mr. dufty when you visited the site and looked at it you saw in essence two layers. the bottom space you saw a space where the resilient channels are and a second layer above that. you don't know what is above that layer; right? >> mr. fung, it was about three months ago and the inspector was on the scaffold but he verified what he wanted to see and they cut the holes and we left satisfied. >> the reason i ask i don't think you can get a find assembly that is two hour rated with only two layers. >> two layers? i'm not sure. we go by the manual here. there are several ways to achieve it, so without going back over the approved drawings and the detail we won't know that. >> understood. >> so if you want us to do that we will. >> okay. >> okay. thank you. commissioners matter submitted. >> well, i think it's hard for me to decide if i don't know what is there. t