Orlene Flooring August 02nd, 2017 - 14:35:38
Truss floors are simply that. They are constructed from small dimensioned lumber, interconnected in a webwork pattern by the use of metal or wood plates. Occasionally, the trusses will be built on site, utilizing plywood plates to connect the webwork together. Generally they are installed 24" apart, either suspended on bearing walls or beams, or installed with plywood trim or rim joists around the perimeter. Strapping is installed on the bottom side, to prevent turning in place, which is a common ailment for deep truss components.
Strip floors, were once the most popular type of sub-floor installed. But with the introduction of manufactured sheathing products, it has become less utilized. Strip floors consist of 1" by 6" or 8" boards, placed diagonally over the floor joist framing system. It is slightly more expensive to install, and requires experienced tradesmen. To install such floors properly, the lumber should be non-kiln dried, with a relatively high moisture content. This may seem odd, but in reality, as the wood dries out, it will shrink.
There are three main types of sub-flooring installed to cover and span the floor structure. It is over this that the finished floor will be placed. The sub-flooring types include raw sheathing, interlocking and strip. It is utilized not only to provide a surface for the interior finishes to be placed on, but also to prevent twisting or torque forces placed on the building. The sub-floor also allows load sharing within the joist framing system. Often the sub-flooring is glued to the joist work to eliminate creaking floors and to prevent the floor joists from turning.
I encourage you being cautious about potential discoloring of the wood floor in direct proportion to the shape of the center rug piece over time. Discoloration will occur not as a result of the throw rug or center rug piece but as a result of sunlight beaming on the wooden floor in areas around the center rug piece. You see, underneath the center rug piece sunlight cannot get to the wood. So, the color of your wooden floor beneath the center rug piece would be lighter in color over time than the exposed areas. I recommend you use throw/scatter rugs instead of center piece or area rugs as these would be more readily removed, freshened or relocated to minimize a lengthy tenure in one location.