Pardon my ignorance, I&#;m just a simple home owner here and occasional DYI.
With competitive price and timely delivery, XINFUSHI sincerely hope to be your supplier and partner.
Anyway, I&#;m having an addition put onto my house (no, I&#;m not doing it myself&#;WAY out of my league).
The architect had specified 9 1/2&#; TJI to span the addition (it&#;s approx. 37&#; long and 25&#; wide. Joists are running parallel to the 37&#; run).
Anyway, my question is, in the plans, they spec out TJI, but in the &#;first page&#; of the architect&#;s stuff, it says they can use I-Joist or Trus-Joist.
It looks like they used I-Joists (what clued me in was that there were no pre-drilled holes, as I was expecting an &#;easy&#; run for the electrical).
What&#;s the difference between I-joist vs. TJI? Other than the pre-drilled holes?
Do they both have the same structural support?
I believe they are using IPI-800&#;s and the specs were for TJI 230&#;s
Floor I-joists are supported at exterior walls and by girders. The I-joists can bear directly on top of the girder or be supported in joists hangers.
Ceiling cut-away reveals second floor framing bearing on exterior walls. The direction which the framing spans is not easily determined once the gypsum wallboard is installed and finished.
First floor framing is sheathed with wood structural panels and hardwood flooring. There may be no ceiling installed in a basement.
I-joists and the rimboard commonly bear directly on a sill plate that is fastened to the foundation.
I-joists generally don't have longer span capabilities than equivalent depth lumber joists. They are available in long lengths, which allows a single I-joist to span the entire width of a house, but with an intermediate support.
An I-joist is comprised of flange and web material. Manufacturers use different combinations of products, based upon many different factors.
The web is joined to a groove in the flange with strict tolerance. Adhesive is used to secure the joint.
For more information, please visit i joist beam.
I-joist floor assemblies can be constructed to bear on a steel girder and column system as shown in this single-family dwelling basement.
I-joist floor framing just before the floor sheathing is placed.
I-joist floor framing system under construction.
This illustration shows the typical manufacturing process for I-joists.
Early I-joists were constructed with solid sawn flanges and plywood webs. OSB has replaced plywood in the web, but lumber flanges are still common.
I-joists are available in a variety of depths and web/flange configurations. Most I-joists used in residential construction are slightly deeper than equivalent solid lumber products.
The web material is matched to the flange to create a resource-efficient building product.
Plywood floor sheathing is used in combination with I-joists andan LVL girder.
Plywood floor sheathing is used in combination with I-joists. A section of the web has been removed to allow for the passage of ductwork and electrical wiring.
Elements of a floor framing system.
Beams and Joists Intersecting.
IBS bridging is a manufactured wood bridging product that can be used with I-joists to increase stiffness and reduce bounce and vibration.
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