Normal dimensional floor joists are not always the same dimensions, and often they have crowns in them. A crown is a hump in a floor joist caused by a natural curve down the length of the board.

The Steel Joist Institute (SJI) will be hosting its October webinar, titled "Open Web Steel Joists 101," which will highlight the basics of open web steel joists and joist girders. The webinar will be ...

For flat floors and open designs, choose wood trusses over joists . Feb. 5, 2021 at 8:55 am Updated Feb. 11, 2021 at 2:36 pm . By . Tim Carter. ... not a narrow 1.5-inch-wide floor joist.