A little about myself, I've been in the construction world for 30 yrs. I've built log homes, custom homes and have done a tone of remodeling. All of my construction has been done Lake Tahoe Ca , Sun Valley Id , and in Steamboat Springs Co. I'm currently working on smaller jobs and have recently contracted some work @ Tri State Power Plant which is coal generated electric plant. I recently posted a question using steel ceiling joist wanting to know the span I can use to support a dropped insulated waterproof drywall ceiling .