Timber Engineering Europe
What are Eco-joists?
They are a fully engineered solution for providing unrestricted spans for up to 7.5m. The eco-joists are a very simple
concept that has raised the bar in engineered construction to an unprecedented height. The timbers used for Eco-joists
are the same as the walls, being Pine/Spruce/Fir. The Timber Strength Class (TSC) is raised to TR26 form C16 and a typical
timber size actual is 47mm x 72mm or 47mmx 97mm. The joist consists of two timbers (Top chord and Bottom Chord) these are
held together by metal web flanges pressed into the top and bottom chords by a special machine. The size of timbers and
spacing of the webs are determined by the designer or engineer, using stand-alone software supplied with the license from
Gang-nail industries. We are one of the very few organizations who hold licenses for Gang-nail Ecojoists and Trussed Rafters.
Standard joists only allow 1 option to specify the ceiling heights, whereas Eco-joists offer various depth options
from 195mm - 304mm and the joist can be hung from the top or the bottom chord depending on requirements. This is possible
because of the engineering principles engaged using the tension and compression principle. (See Trussed Rafters)
Uninterrupted spans of up to 7.5m can be achieved and this means that large open spaces can be easily achieved in any
property at any level, if designed correctly. In larger buildings such as public buildings and sports complexes, where
even larger uninterrupted spans are called for we can find a solution almost any span using Glulam beams. Using an
engineered solution removes all the unnecessary columns and thick walls currently required in traditional concrete/masonry
The floor decking face (top of top chord) is 72mm wide and perfectly flat, and this allows the floor decking fixer more
scope to anchor the boards correctly. Another benefit of the Eco-joist is that it does not have a turning moment, as solid
joists do. This means that no bracing is required between the joists, unlike traditional timbers. The bracing takes a long
time to install, so using Eco-joists; the cost of the extra materials and labour is saved. Eco-joists are very quiet as
there is little movement. A floor built to
using Eco-joists can be tiled as tradition here demands, but prevents noise travel and scores
very highly in the Passage of Sound Rules.
Because the Eco's are made to measure, no site waste is generated and the materials used are kiln dried thereby affording
minimal shrinkage or swelling. The installation time of eco-joists is around half of that required for traditional joists,
therefore vastly reduces labour costs
These are a lightweight component and can be installed very quickly with the minimum of manpower. Because the whole system
is open, water delivery and waste systems, along with cables and other service ducts can be run in several different
directions, making savings on materials, also on the electrician and plumbers labour. It also reduces the need for bends
on pipe-work that cause pressure reduction and avoids surface run infrastructure. Joiners site time is kept to a minimum
as no notching, drilling or boxing pipes in is required, and the joists are not weakened by drilling/notching, as is the
case with traditional joists.
Fire resistance is also an engineered feature in this product, and it meets all the code demands for Portugal and Spain
as it does for the whole of Europe. No notching or drilling to accommodate services means that the component retains the
design integrity and is not weakened as is the case with other materials used for the purpose of supporting floors.
Eco-joists are also used as a roofing member, and can be employed in several different ways.