Another house using component construction is demonstrated here using wall panels and roof trusses. The Framer Series lumber used in the wall panels was a huge part of the general contractor and the homeowner decision to go this direction. The lumber is guranteed not to bow, twist or warp, keeping a desirable vertical orientation. The crown is clearly marked, the studs are treated with a mold inhibitor, and there is a two year warranty on sheet rock pops until the house actually settles. This is southern yellow pine rather than spruce pine fir, which is normally used in residential house building. The properties of southern pine make it dense and solid, which keeps the walls and ceilings flat and even. No valuable time is spent culling and the dumpster is kept free of wasted boards. The combination of roof trusses being used in conjunction with the Framer Series wall panels assure a continuous load path from roof to foundation with LSL (laminated strand lumber) headers and stud clusters correctly sized for the application. The result is a superior finished product, with minimal waste, using environmentally friendly materials.
Archive for May, 2012
At the end of the eastern section of the boardwalk, oceanfront Myrtle Beach, is a new Mexican restaurant is under construction. Bandito’s floor plan includes a 31′-0″ tall rotundra roof open to below a spacious dining area. The 10 1/4″ thick Superior Wall system provides a solid fortress designed to resist corrosive salt air’s constant bombardment. The precast insulative concrete panels are known for their durability and strength. Highrise condominum housing typical of beach construction have to meet extreme conditions and require special considerations in product types and usage. If you were to leave your window open for fresh air, within the year your TV would need to be replaced. Window and door warranties are specially written to assure the glass is regularily cleaned to be honored for replacement. The purpose of my visit was to confirm bearing conditions for the roof truss system designed to carry the spanish tile roof. Interpretation of architectual and structural drawings combining wall and steel bearings at different elevations is required to confirm the roof system I am selling will perform as it is expected to.
Returned to the jobsite of the previous post to illustrate the capabilites of modern designed attic frame trusses. Once these 60′-0″ trusses were craned into position, secured in place with the exterior sheathing, interior framing can begin. The 1 1/2″ floor of the attic frames is complimented 3 1/2″ floor trusses at the top of the stairs and between the 4 ply dormer girders. Using conventional 2×10′s restricts mechanicals (ducts, wires, and plumbing). This roof and floor combination adds continuity by allowing these various trades to access and pass through web members. You can see from the front elevation picture all this is concealed in this “story and 1/2″ condition. Transporting trusses of this size with extremely large finished rooms in them require shipping braces. This framing crew has installed this system by correctly sheathing the roof with permanent bracing as they set the trusses. The shipping braces, simply attached with 2×3 connector plates, should remain intact until the roof is completely braced. The real value is the deflection reduction using a 24″ deep floor over a 2×10. This room finishes at 28′-8″ wide and 9′ -2 1/4″ tall. All this space utilizing only 4 (and sometimes 3) bearing conditions along the 60′-0″ span. This is unheard of in conventional framing and adds value to open floor plans.
Demanding situations require professional solutions. These trusses were 61′-10″ long spaning across the entire house and garage. There is a 28′-8″ wide room that is 9′-2 1/4″ tall. A complete room is concealed in this mammoth roof system. The real trick is being able to deliver a set of this size angled corner to corner and keep them off the street and sidewalk long enough for the crane to position itself to set them. The driver on this particular load did such an excellent job rolling these trusses off without incident. No easy feat considering uneven surfaces and the mechanics of wood rolling off dunnage, eventually dropping about three feet off the back. Aided by packaging as one unit through banding, the groaning sound of wood on metal was horrendous, but yielded no observable broken webs or chords. The large attic trusses required temporary bracing due to the room size. They are to remain in place until the plywood sheathing is installed bracing then together permanantly.