Deck Construction Details

Many of the decks we see do not meet the requirements for deck construction. While older decks are not required to be updated to meet today’s standards, home owners should consider improvements that make decks safer.  The attached article produced by the American Wood Council, is based on the 2009 IRC (International Residential Code)

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The attached article produced by the American Wood Council, is based on the 2012 IRC (International Residential Code)

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Damaged Engineered Floor Joists (TJI)

Engineered floor joists used in many homes today, can span long distances, allowing for many of the open plan designs that are popular in today’s home designs. These joist are installed with strict installation guidelines, if not followed, can compromise the floors integrity. One of the most common errors we find is damage to the top and bottom of the joist (the top and bottom cords). See Page 9 of the attached. The following picture is an example. Look closely and you will see, the plumber has drilled thru the top of the joist (the cord).

 

When damaged in this way, it is required that an engineered be consulted to design a repair.

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IBI Joists Residential Design Manual

A common problem found when conducting framing (pre-drywall) inspections is damaged engineered floor joists that are either missed or field repaired without proper documentation. Engineered floor joists, commonly referred to as TJI’s, have very specific guidelines as to what can and cannot be done. The most common issue we see is damage (cutting or drilling) of the top or bottom flange. Page 15 of this IBI manual addresses the issue. If damage of any type does occur, these joists must be evaluated by an engineer, who has the responsibility of determining what action if any is needed.

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