When most builders are determining joist spans for decks, they refer to floor joist spans in their local US building codes. However, decks have to withstand moisture and inclement weather and may be framed with incised treated lumber which means that those joist ratios won’t be accurate.
I-Joists are engineered wood products that are gaining popularity with building professionals. Engineered I-Joists are manufactured under exacting conditions to ensure consistent strength that provides long span and high load capabilities. These installation tips are supplementary to your manufacturer’s instructions and technical guides.