What are the maximum spans for a given depth?
Presently TrimJoist™ products are manufactured in 24-inch incremental lengths beginning at 4-feet and working up to a maximum stock length that is depth dependent. These maximums are as follows: Depth Max Length —– ———- 12″ 24-feet 14″ 26-feet 16″ 28-feet 18″ 30-feet Thus it is possible to clear span 28-feet (allowing for end supports) with a 16-inch deep TrimJoist™. This works great in basement type construction by eliminating those unsightly pipe columns, extra beams and footings.
