Published at Saturday, 22 July 2017 by Lundy in Flooring, with total 23 photos.
All joists must extend at least 1-1/2" on to a bearing assembly, of either a beam or full height wall, unless metal hangers are installed to provide proper bearing support against other structural components. Beams, which support the floor joists over greater spans, are constructed in the form of laminated joists often referred to as built up beams, or one piece solid load bearing beams, cut from logs or manufactured. Electricians and plumber may often cut or drill into the joist work to install utilities, and this is accepted, so long as they do not remove more material than what is required by codes. This type of floor system is usually the cheapest to install.
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.
Another way to prevent undue and excessive wear on your hardwood floors or wooden floors is to use scatter or throw rugs in high traffic areas. You may even be tempted to use a center rug piece for decor. Now that you and I have gotten past the fun stair rail slide and onto the floor, it is utterly important that we stay clear of injury -- Ensure that your throw, scatter or centerpiece rug either has sufficient non-skid backing or that you lay a non-slip material between it and your wood floor.