Published at Thursday, 03 August 2017 by Lundy in Flooring, with total 30 drawings.
In the case of long span truss work, bearing lengths of at least 3" are quite common. Trusses span greater distances than framed floor assemblies and can be designed to span the entire building, eliminating center load bearing supports. They are moderately more expensive than framed floor assemblies, but provide a remarkably strong floor with little deflection or "bounce" to it. Another advantage to this type of structural system, is that utility installations can be run between the webwork components. Never allow trades to cut or drill into the members of a truss, for they are manufactured precisely for the loading conditions they will undergo during the life of the building.
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.
Ceramic tile is probably the most durable types of flooring and is typically installed in entry areas, where sand scuffing and water accumulations are the norm. Bathrooms and kitchens often get this type of floor treatment as well, but due to the high cost of installation, homeowners tend to not include these areas. Ceramic tile are typically a square tile, although interlocking units are on the market, in standard square measurements of 4", 6",8" or 12". They are installed by one of two primary methods, either set into a thin mortar bed (called "thinset adhesive"), which also acts like glue, or a heavyset bed of 1-1/2" normal mortar base. For all ceramic tile installations, the floor must be built up to ensure the strength required to prevent tile or joint cracking. Often, installers put down a material called "cement board", which is much like drywall, but is made of glass fibers and cement. In any case, ensure that your installer will offer you a guarantee against future cracking or uplift of tiles. Ceramic tiles require little maintenance, but beware, water on glossy floor tiles can be very slippery, and many a time, a homeowner has resented the installation of a high gloss tile, over a bathroom floor area.