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.