Make your first joist 15 3/4, then your edges of plywood at 4 foot, or 8 foot should fall in the middle of a joist. I would use 4/8 or 3/4 T&G plywood run perpendicular to the joists. that big I would sister 2 2x12 for the beam, and put a 6x6 in the middle. then you only have one support pull in the way. Michael
_____ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Larry Stansifer Sent: Friday, January 11, 2008 09:51 To: [email protected] Subject: [BlindHandyMan] Finding the centers What is the best way to locate the 16" joist centers once you have the plywood laid out. I have a number of ideas however none of them have been tried and I'm not looking to reinvent any wheels. If my math is correct it will be necessary to split the third joist thickness in order to accommodate the edges of both sheets of plywood. Does this mean I need to trim off a given amount of material on each sheet prior to fitting it? Is an inch more or less on that third joist sufficient to fasten the adjoining edges of the plywood? What do I do to keep from building in a squeak where the plywood edges butt up? [Non-text portions of this message have been removed] [Non-text portions of this message have been removed]
