Aveline Flooring July 25th, 2017 - 21:14:14
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.
For the second variable here is a controversial opinion: we do not end match our flooring which means there is no tongue and groove on the ends of the planks. Since we recommend our floor be glued down we say this is an unnecessary expense for the customer. End matching reduces the yield in production and raises labor costs. Most end match profiles are milled so loosely that they really don`t hold the floor in place anyway. The biggest benefit to the installer is that the plank can be cut in half in any place and reused anywhere without have to mate up to a complementary tongue or groove since the end is just square cut. This means all end trim pieces or any waste can be reused. Therefore on our engineered flooring product the waste factor is virtually nothing unless there are angles or radiuses to work around. We also help with waste factor by usually supplying a random width product so when one gets close to the end of a room they can plan the width combination patterns out to not have to rip much off the last row.
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.
One drawback is that this type of floor requires special hanger systems designed for the joists, to enable them to be hung from each other or against beams/bearing walls. Manufactured joists are becoming a popular flooring system, for they are relatively cheap, reduce labour time and provide adequate support. However, builders need to familiarize themselves with its installations, for poor installation can cause severe structural damage to the joists. A good example is a three point, center bearing joist, left with the top chord uncut, which can potentially fail or pull apart, over the center bearing point.