we'll here with path buscovich, engineer, engineer for many of the high rise owners in san francisco. we have other snerkts from the e department of building inspection. we're going to start right now by walking down into the concourse lower level and take the freight elevator up. so come on with us, okay? [ ♪music ] >> okay. we are up here in one of san francisco's major high rise buildings, one of the tallest buildings. not the tallest but one of the tallest. >> the tallest occupied floor building in san francisco. >> everybody has a slice of really soon. actually the tallest building is the transamerica pyramid building. you could say it's the sutro tower, transamerica pyramid is the tallest building. we're here and we have the unique opportunity thanks to the building owners and the managers of the building to come in and take a look at how the building is made and ough all of its mechanical systems. what keeps a mooirj major high rise building -- how many stories is this building? >> 50 stories, plus or minus a few. it was designed in the '60s by the firm buneir, who are the pree