" They're called I joists because the center web of oriented strand board is joined to a top and bottom flange. The profile as you can see here forms the letter hi. Let's take a look at how this gets done. First two lengths of plant material are loaded into the assembly. The flange is made of laminated veneer lumber called LVL. It's another engineered wood product itself composed of many layers of wood veneer bonded together with a resin. They used LVL here because it's very straight and strong and doesn't warp or shrink. The ends of each flange are marked with fluorescent paint to trigger the cut off saw -- we'll see that later in the process. The planters are loaded two at a time into the assembly and then a groove is routed into each one. A specially formulated adhesive is applied into the groups and they're ready to receive the web material. Simultaneously. The -- are being prepared to enter the assembly line as well. They're composed of oriented strand board or OSB yet another engineered wood products made of small wood strands oriented in layers. Cut into smaller pieces to meet standard framing depth for our viewers. -- OSB is Fed into the profiler where beveled profile with machine to all four sides. -- more adhesive is applied to the ends and the -- pieces are Fed into the joist assembly line. One by one the web sections are Fed into the lines and pressures applied to the planters. To join them together snugly into one continuous I -- Those fluorescent paint -- we saw earlier act that trigger points for the flying cut off saw which trim the I joist to sixty with inventory lengths. The length traveled into the hot house. Where they're cured at a hundred degrees for 45 minutes to set yet he's."

" As they exit the hot house the I joists had to the nesting station where there are nested to save space and -- correct."

" The bundles are strapped together and wrapped for shipping. I joists are selected at random from the process and taken to a testing stations. Where pressure is applied to the joist until it fails. This test ensures that the product exceeds the APA standards for strength. There are lots of reasons for using engineered wood products like I joists instead of traditional solid sawn lumber. I joists are actually stronger than solid to -- and depending on the market they're comparable in price. They use about half the wood and don't require the cutting of old growth timber. You were in faster growing trees are consumed in the process and because of the way -- engineered products like these are more dimensional a stable fit and strong."

" Now the second floor deck is on the crane to lift the -- or structural insulated panels for the gave a list and for the second floor walls confident that. Plan is to have the roof aren't and the house enclosed by the end of real time they want of the blitz build. The group itself the blueprints to convert the order for raising the walls happens. -- Get a -- it's plain. And John -- from premier wall systems and the carpenters I'll get right to work on the second floor wall. They applied adhesive caulking to the edges of the panel. Bend the panels are lifted onto the plate and pushing together and tongue and -- back. For the pre fabricated sips panels fit together like a giant three dimensional house. -- The citizen panels are the sandwich of oriented strand board and rigid insulation that combine the steps involved in traditional framing sheathing and insulation in one system. The individual sections are constructed off site according to the architect's specifications. The sections are trucked to the site and assembled together. The light weight of the panels makes them easy to install. But there's strength. Stiffness and stability exceed most residential codes. And this. Crew has really fast in the wall panels are getting together perfectly. Because there are no studs you can bathroom fixtures and cabinets to sips panels anywhere along the continuous oriented strand board service. Before we raise the ridge beam and the roof panels. The crane lifts the pre assembled interior walls framing sections for the second floor on to the death. The carpenters get to work immediately framing the bedrooms and bath area."