Friday, April 29, 2011

Building Prefabrication Phase II

The first step after constructing and erecting the three building sections was to apply the plywood to the building. Once the buildings were square and level, the plywood helped us to maintain the square status of the building, while creating an interior and exterior space to each individual room.After the plywood was put on the building, we added tar paper to the exterior in order to help us keep water off and out of the building. Although tar paper is not water tight, it is water resistant and was very helpful in preparing each building for its final exterior material.

With the application of the tar paper on the building finalized, battons were then mounted to the building so that cladding could be added to the exterior.

Using the battons on two walls of each building, the cladding was mounted to the necessary sides using a drill, a screw gun, and when needed, a clamp or ratchet strap. The screws were screwed into each batton to ensure a sturdy exterior rain screen for the building sections. The design for the buildings was to have the wood cladding wrap up and around the entire exterior in one direction so that continuity of the ground plane's direction was maintained. The seams on the buildings will align with the seams in the deck on site.

Once cladding was applied to all of the appropriate walls, any excess was trimmed to create a smooth seam between roof and wall.

Monday, April 25, 2011

Roof Prefabrication Phase II

Joists were placed between each of the trusses that makes up each section. Once all of the josts for the entire truss were framed out, we added battons to the top of the roof section. These battons will be used to add the metal roofing to the structure once the roof sections are placed together on site.

Thanks to the high base space's pully system, we were able to separate and lift the roof sections off of their original supports once completed. Each roof section is approximately 2,700 pounds.

In order to begin working on the ceiling of each roof section, we had to use the pully system to lift and rotate each roof section upside down.

Tar paper was then added to the roof sections to prevent moisture from accumulating inside the section. We used a combination of white pine and repurposed heart pine salvaged from the Tire Warehouse in Clifton Forge to create the market ceiling.

The last step of the process is to apply waterproofing so that the wood would not get wet. Once each roof section was finished we were able to use the same pully system to lower the section onto dollies to move the sections out of the work space. The whole class would then work together to move the trusses out to locations where they could be "parked" until transportation up to Covington.