assembly for the shaft. that is a special stub that allows you to insert the dry wall panels from the side that you are standing on. >> we are looking up and i see this crane. we have been reading about crane issues and safety. come over here and tell us a little bit about safety on this structure, the safety program, and about how the crane fits in. >> it is probably one of the most dangerous pieces of equipment and it is the most rigorously protected. we had cal osha out here doing test weeks. >> cal-osha comes out because the state of california, unlike the city of new york or other places, in the state of california, cranes are inspected by the state, not the local jurisdiction. in the wake of the crane collapse in california in 1990, the board of supervisors passed legislation which is now still in it regulations in the building code that requires

crane safety programs to make sure that the building department is collecting all the information, but we reply. we rely on kali should do the actual infection. what did they do for an inspection? >> they bring about 20,000 pounds of test weights and check all the weight limits and wells and electronics and connections and the limits. they do everything. >> is there somebody up there right now? >> there is thomas in the cab. >> can you get him on the radio and have him we've to us. -- and have him wave to us. there is a job. >> there is no bathroom. we will not discuss that. >> the safety rules say there have to be some provision. >> there is a provision. >> don't stand under. >> we have a couple of different

kinds of cranes around the city. we have a fixed height crane, like this, and then we have some that are climbing cranes. >> this is a free standing crane, not bolted down. about all of these big concrete waits? >> 160 pounds of concrete is the ballast week. >> did you have to pour a big foundation under that? >> this is a construction method that we get to, we work with the contractor. we get a load from the crane manufacturer, figure out the downward load and the overturn load. we then make sure that the foundation can take that load. also, all the anchors on the floor are adequate. >> why would you do this instead of fastening it to a fixed base? >> this crane is not part of the foundation system, so it is out

board of the structure. basically, it is something that worked well with the courtyard and a landscaping and the irrigation outside. in one month, the crane that is going up will be part of the foundation. >> bolted to it? >> exactly. >> the other kind of crane, which worked their way up as the building that's taller and lift themselves up and slide and. >> those are climbers. >> the climbing crane. it was a climbing crane that collapsed in 1990. >> we do not like climbing cranes. >> they are safe if they are done correctly. no margin. not much margin. >> how you get one of those set up if it is not a climbing grain and there is a fixed piece underneath? how does that it set up? >> the crane is brought in it in sections. as the foundation is poured in,

the, up with a mobile crane unit, put out the section, then they build the jib on the ground. >> what list it up? >> 225-ton portable crane. >> they bring out another crane to set up the cream? >> exactly. >> this particular crane is brand new and it automatically shuts down at 35 mob. hour wind. -- at 35 miles per hour wind. >> i got a call a while back from some neighbors who said the crane was spinning around, free- spending, and i am worried. when they shot down, they're not fixed into position. they are allowed to rotate freely with the wind. weathervaning. when their shutdown, they'd still move because it reduces the load on the crane.

>> i am wondering to what degree the guy at the top is typical there? and the weight will have a strain the further out. the u carry weight that you would not be able to take to the end of the boom? how you keep from it malfunctioning and going to the end of the boom? >> basically it has a 145-foot jib on it. as you go out, the capacity goes down. this crane is good for about 17,005 propounds at 50 feet. there are warning systems on the crane. if he actually tries to override the system it will shut down. the only thing he will be allowed to do is drop a load. >> as the ground moves, if you exceed the 3 inches that you have designed for the building to settle down, what would

happen? how would that movement transmit through the floor? >> most of the settlement takes place right after construction. the settlement that there were mentioning his total sediment, due to the mass of the building itself. once we get an earthquake, the foundation is designed such that all of the friction forces against the piles resist any further displacement. there will be some displacement, but it is all calculated into the computer model that we have generated. >> how much settlement would you expect from the initial baseline? >> typically, with piling foundations, 1 inch or less. three-quarters of an inch is what is expected. >> does that impact any of the systems in the building or anything? >> most of the settlement occurs

during construction. as you lower the material a continues. what she did most of the building structure up, then you put the finishing on it and you cannot see the cracks because most of the settlement will be gone. >> let's talk about greene design. a big thing and san francisco, before the board of supervisors, is legislation, if this building were built next year, would require that this have eight lead certified building, silver building if it were built next year. what kind of green provisions are built into the building? >> we have done as much as we can with the checklist with the limitations and budgetary constraints that we have. we're hoping to be certified to achieve just under the lead

silver level, although we're not going for the certification because of the process on this particular building. >> can you mention specific green building construction strategies? >> we have worked with our structural engineer using flash in the concrete. >> what is that and why is a green? >> it is a byproduct of industrial waste, basically, the smoke from the smokestack, ash that is collected. it provides a great material, a great part of the concrete mix. it is recycled and is relatively inexpensive, although it is getting more expensive because there is a lot of demand for it. >> any other green -- >> it affects the curing of the concrete, prolongs it. >> does it affect the ultimate

strength? >> it actually improves it. >> as far as the budget, with our contractors, because of the curing time, it is expensive. we could have put more cash in the concrete, but the more they put in, the longer the curing time and the longer the schedule and the higher the cost. >> any other green features of note in this high-rise? >> there are a number of features, such as using recycled products such as carpet, cabinetry, things like that. we are using what they call no added formaldehyde wood in the cabinets. the building is largely not air- conditioned, which in our climate, it is benign, so it allows that. that is a green point.

>> what about water strategies? >> when you talk about lead certification, a lot of the factors taken into account are things we are able to achieve just by virtue of the outstanding location, walking distance to the best transit hub in the city. we have walking services for just about anything anybody could want. >> we have high efficiency boilers to heat the water. it is a water source domestic heating system. >> what is next to the tower crane? we have a big blue piece. what is that? >> that is a concrete placing boom. that is how i put the concrete up onto the deck. the concrete truck will back into here, go to the hopper.

then i have a slight line that runs up the center of the boom. that completes all the dax, walls, and columns with that. >> it must take a lot of power to push that. how much concrete do you typically place? >> on an average day, the walls, 147 yards. the deck is about 210. >> how much is in a truck delivery? >> 10 yards. >> so you have a bunch of trucks backed up, all day long. where is the concrete coming from? >> we have bodie concrete off of third street. >> there are not that many concrete suppliers left in san fences. they used to be a bunch. is there anybody else beside bodie? >> we like bodie. >> they are bringing concrete in from a distance because there are not many yards anymore. in general, san francisco, part

of the planning issues and san francisco are the loss of p.e.r. production and construction related services. we still have some, but now we're seeing more and more of these services outside of the city and the cost goes up because you have to import goods and workers. when you get your bricks fixed in your car, pretty soon you'll have to go outside of san francisco because it is becoming not a friendly place. i know the planning department is working hard to keep it in its working condition, and i wish them luck. the way that these concrete walls are don is typically there is a prefabricated panel that is set in place. these prefabricated panels? >> plywood and to and studs. at the top, those were poured yesterday. we will take them apart.

>> it has formed release material so the concrete is not stick to it. >> correct, it is a special plywood with a finnish sauna that lets it strip easier and then we also spree with oil. >> than a pop these apart and reuse the panel's. >> we will change the plan would usually one time through the 12 story building is because the plywood starts to get worn. >> howdy keep everything perfectly lined up? -- how do you keep everything perfectly lined up? >> we have control lines and we have crude lines -- and a grid lines with the surveyors. we plumb everything up. >> about how close, what is the tolerance? >> before it is tension, within a 16th of an inch. as the building gets attention, it begins to shrink. -- as the building gets

tensioned, it begins to shrink. >> what is the allowable tolerance for the design? can you move things around a quarter inch or so to get things to fit together? >> amkor bridge would be a lot. 1/8 of an inch is typical. -- a quarter inch would be a lot. one eighth of an inch is typical. obviously, certain areas are more critical than others. there are a lot of the dimensions that come out of scale access requirements that they have to be met. the city has a field inspector who will come out and measure every one of those. we try not to design tight areas in close proximity to concrete walls, but sometimes it is necessary. >> the california building code specifically says you are allowed to use reasonable construction tolerances and we have adopted a regulation and

california in the san francisco building code, a copy on the table, the san francisco building code, a couple thousand pages, and it tells us what tolerances are allowable, and it is not a lot. if they say do not exceed, you may not exceed at all. every floor, it is an elevator building, so every floor and unit has to be accessible from the public spaces, correct? >> what the code requires typically in california is that every unit has to have a clear path of travel to the front door of the unit, as well as through all public areas of the building. within the unit, a certain percentage of those have to be outfitted with grab bars and additional clearance required for floor accessibility. >> that is important for a big building and high rise because you have to lay this out exactly right. the plumbing has to be in exactly the right place, the walls have to be exactly right

all the way up or you did not meet the very critical tolerances. it is a real challenge to make sure it is exactly where it belongs. >> we're talking before about post tension slabs, which are a wonderful tool for reducing concrete in making buildings lighter and less expensive. but you need a precise path through the slab. those openings for plumbing, electrical, etcetera, have to be designed have time. once they are there, you cannot change them a lot. some building owners do not understand that you cannot drill holes through the slab 20 years from now. >> tellez with that is? >> that would be a fire sprinkler pipe. >> we have a bunch of different types. this is fire sprinkler pipe. they hang this from the ceiling somehow, run the fire sprinkler line through here. about all the inserts and all the fittings, there is a lot of pre planning and coordination. you cannot drill into the slab.

all the guys are up there nailing inserts from the top on the layout, all the walls laid out. there is a threaded insert ready for this. >> they did not go below and drill a hole. >> no, you see the spray painted lines? they basically give as a guideline so we know where the tendons are. >> all this is figured out before you pour the slab. then the wall is going out. the walls are, what are the call? what is this made of? >> they are framed with light gauge steel studs, which are typically 25 gauge. on this project, because it is a high-rise, they tend to be heavier due to the acceleration forces on the upper floors. typically one, too, or more layers of drywall over that. >> how much movement can we

expect in a building like this, either with wind load or seismic load? high-rise buildings are usually built by either wind or seismic. in this case, it is not that paul. it -- is not that tall. the most buildings in san francisco bay area are not covered by wind, except maybe in the central valley. maybe wood frame buildings with large surface areas. seismic, or earthquake is what is governing this design. th. the lateral system is the bearing wall, fairly stiff. i cannot recall the actual displacements, but they are not much more than a couple of inches. >> how do we finished these? give us a clue how you finish

this thing. >> most of the exterior sa are what is called glass fiber reinforced concrete. it looks somewhat similar to the precast concrete panels. both are exterior skin panels fabricated of sight and brought to the site and assemble at the side of the building. it is three-quarters of an inch thick. mostly to steal, and it has to be engineered as a separate item functioning together, installed on to the face of the building. windows, doors, etc. go into openings, they get slashed and sealed with a joint sealant. typically we try and maintain 3

1/4 inch gaps between any kind of door or window, and a penetration to the outside. >> one issue with all buildings is water perpetration. probably the no. 1 problem is water leakage. how do we prevent that here? we have calking, flashing. >> obviously the flashing goes in first. we use a couple of different kinds, and a lot is typical galvanized sheet metal. in some more specialized or demanding locations, we have a number of different rise to flashing materials, some more stressed than others. we also use some materials that have a thin coating, a type that comes from clay and has the

ability when it gets wet, it expands a little bit. >> people are always selling waterproofing materials, but one type works really really well with no holes. the other thing that works is when people use this field does not leak. but as soon as you require whether proofing or caulking, it does not shrink, it all fails. one of the first things to go is almost always the weather proofing detail. unless it's says expanding, it tracks -- it does not shrink. at the very end of this, we have to put a roof appear. what is it made of?

>> it is a conventional roof with layers of asphalt impregnated belts and a coating. it is a traditional roof. we want tail construction to provide us at such terrific access, and this is a terrific opportunity. we also want to thank -- thank the architects and engineers and all the soil contractors. thank you very much. (music)

>> herb theatre,open rehearsal. listen to the rehearsal. i think it is fun for them, they see our work process, our discussions, the decisions we make. it is good for us. we kind of behavior little bit when we have people in the audience. msk (music) >> we are rehearsing for our most expensive tour; plus two concerts here. we are proud that the growth of the orchestra, and how it is expanded and it is being accepted. my ambition when i came on as music director here --

it was evident we needed absolutely excellent work. also evident to me that i thought everyone should know that. this was my purpose. and after we opened, which was a spectacular opening concert about five weeks after that the economy completely crashed. my plan -- and i'm absolutely dogmatic about my plans --were delayed slightly. i would say that in this very difficult timefor the arts and everyone, especially the arts, it's phenomenal how new century has grown where many unfortunate organizations have stopped. during this period we

got ourselves on national radio presence; we started touring, releasing cds, a dvd. we continue to tour. reputation grows and grows and grows and it has never stopped going forward. msk(music) >> the bay area knows the orchestra. you maybe take things for granted a little bit. that is simply not the case will go on the road. the audiences go crazy. they don't see vitality like this on stage. we are capable of conveying joy when we play. msk(music) >> any performance that we do, that a program, that will be something on the program that you haven't heard before. string orchestra repertoire is pretty small.

i used to be boxed into small repertoire. i kept constantly looking for new repertoire and commissioning new arrangements. if you look at the first of the program you have very early, young vibrant mendelson; fabulous opener and then you have this fabulous concerto written for us in the orchestra. is our gift. msk(music) >> and then you have strauss, extraordinary piece. the most challenging of all. string orchestra work. 23 solo instrument, no violin section, now viola section;

everybody is responsible for their part in this piece. the challenge is something that i felt not only that we could do , absolutely could do, but i wanted to show off. i can't tell you how aware i am of the audience. not only what i hear but their vibes, so strong. i have been doing this for a long time. i kind of make them feel what i want them to feel. there is nobody in that audience or anywhere that is not going to know that particular song by the fourth note.

and that is our encore on tour. by the way. i am proud to play it, we are from san francisco. we are going to play that piece no matter where we are.