>> good morning i'm laurence cornfield chief building inspector and like to welcome you to our brown bag lunch we do the third thursday of every month at the department of building inspection. we invite you to participate so call for information and join us. our next talk is on decks and balcones. today we will talk about commercial restaurants in san francisco. we have a lot of people in the audience who are restaurant exe experts and architects and industry people. i should talk about commercial restaurants and how tog