laminated glass -- >> so laminated glass is actually a fairly strong material. you know, again, if you hit it in the center, it is. it's a little weaker on the edges because what happens is it can kind of chip, and sometimes it will run, or whatever. so the edges -- because essentially you're talking about two pieces of eight inch glass. the edges are a little bit fragile. but, you know, that's what happens. essentially, you've got point of impact there, but it all stays together. and so in a quake or whatever, in an accident, auto glass, we used a lot of that in the auto industry, a lot of lamination. so this is what works pretty well for that. plastic, you know, plastic is easy. we're doing more complicated plastic, but great material, except scratches, it does all sorts of things, and it burns. not the perfect product. another instance that we're talking about, that is what do we do with mirrors. mirrors are essentially quarter inch glass, with a silver backing. and so the -- how do you protect those. these can't be tempered. they can't -- technically they ca

and so laminated is probably most skylights that we do are laminated. or an insulated glass, where the laminated is on the bottom, and tempered is on the top. >> with an air space -- >> with an air space. the laminated, at one time, they used to sell tempered skylights but they really didn't work terribly well. yes it breaks into little safety cubes but if it's falling from 100 feet above -- >> the code had a provision that you had to have a net underneath to catch the pieces, if it broke. >> which i'm using. so at this point, not going there. it's laminated on the bottom, tempered on the top, so that a fireman can really walk over this on the rooftop, and whatever. you know, it's good for the top. bottom is protected. so that's primarily where most wire glass has gone. >> just a comment about skylights in the building code. skylights of glass can be located at any distance from that property line protection that i mentioned earlier. typically in san francisco when you're on a property line you have to have a one hour wall. olderbles don't have it but a

what you need is a piece of laminated glass -- your best insulating for sound is a piece of laminated on both sides, and an air space, or just a really thick piece of laminated, using different thicknesses of glass so they vibrate at different levels. we use a lot of material where we have quarter inch on the outside, and 060 interlayer, and a piece of 3/8 on the inside, they're vibrating at different levels and the insulating is turning them down and that really cuts down sound. san francisco has become far more noisy and we do a lot of acoustical installations. the fact is the thicker this glass gets, the more it insulates against sound. so it's just you keep throwing money at it, and the sound goes down. the problem is that, you know, your walls may not be as -- you don't want to have the glass be more advanced than your walls, or the fact that you've got an open window, you know -- you have to seal off anyplace that air is going to infiltrate. >> the building code changed in 1974 to require sound transmission assemblies be placed between units, apartments, his in new buildings, or

you laminate the pieces together as you would a butcher block. >> so what do you do after the finishy model? >> then you want to get the measurements from the clay model. then i start drawing lines, take the measurements of the eyes, forehe forehead,. i start dropping the head back and bringing the nose forward. if you make a mistake then you have to carve deeper and if you keep carving deeper you add wood in the back because you're taking a lot of wood away in the front. so you can make mistakes but it's costly because it requires a lot of time. >> when it's completed this figurehead will be eight feet tall and will replace an earlier version that sal created many years ago. >> the dress she'll have will have a 23 carat gold design, with real gold laid into it. she'll be looking up like so over the horizon. she's the eyes of the ship. >> sal showed us one of the other works in progress. a partially assembled mermaid. >> i have to put the rest of it together. that's all i could work on the rest of the body and finishing and painting it. once i get done with that, i'll laminate all th

. >> be experience begins with the glass facades that was designed with over 120 laminated glass panels captures the experience of being under or over clouds when flying in a plane. depending on the distance or point of view, it can appear clear for more abstract and atmospheric. the subtle colors change gradually depending on the light and the time of day. >> i wanted to create an art work that looks over time as well as working on in the first glance. the first time you come here, you may not see a. but you may be able to see one side over the other. it features a couple of suspended sculptures. each was created out of a series of flat plains run parallel to each other and constructed of steel tubing. >> it is made up of these strata. as the light starts to shift, there is a real sense that there is a dynamism. >> it gives the illusion that this cultures might be fragments of a larger, mysterious mass. >> the environmental artwork livens it with color, light, and the movement. three large woven soldiers are suspended. these are activated by custom air flow program. >> i channeled air

. >> be experience begins with the glass facades that was designed with over 120 laminated glass panels captures the experience of being under or over clouds when flying in a plane. depending on the distance or point of view, it can appear clear for more abstract and atmospheric. the subtle colors change gradually depending on the light and the time of day. >> i wanted to create

there laminate on the the number of, that lived near the crackdown here is an old newspaper and a discarded bag of chips the environmental group that put out the hot spots of trash it pollutes the waterways and harms the habitat for wildlife >> to save the base said 80 percent of the trash, our beaches is brought from inland. >> save the bay is looking for volunteers if you would like to help cut or website and we have information on how you can join >> what's more ahead on the kron 4 morning news we will be back right after this >> >> millions of dollars of damage whooping. >> according to a new study by san francisco street her more than 20 percent of the beach can be washed away a rosen will cost the damages to the coast and infrastructures they will lose tourism dollars and it could also wild white out deeper wildlife did the study also claim if the ocean beach goes the city would be vulnerable to storm surges in >> we saw the fog at moving into the bay area didn't stick around again today >> we are looking at fog hame on to the bay and a little bit of drizzle. partly cloudy conditions