Tuesday, January 25, 2011

Sheer Energy

                      Getting the sheer panel up.  Also the porch beams are in and secure.  I wasn't happy with the wimpy little 'T' braces so there's steel pins driven through the beams into the columns.  Now they don't wiggle.
   There's actually an 'indoors' now.  Gotta do something about that draft, though.  This will be the living room.
                                                    Dining room/bay window

                So about sheer panel.   Before plywood and oriented strand board, what you'd do for diagonal stability was 'cut in' a 1"x4" board diagonally through the frame, then tip the frame up all square and ready to go.  Now, you can just frame it on the ground, tip it up, and worry about getting it squared up later.
                It's 'later' now.
                After all the walls for a particular floor are framed and attached to each other, you nail solid 'sheer panel' up.  They are 4'x8,9, or 10' panels.  Once nailed to a particular wall the frame becomes very stiff and won't budge.  So what I'm doing is starting in a corner, making sure the bottom edge of a panel is perfectly level then nailing it in.  Then compare the edge of the panel with the corner of the frame.  (this frame was off by 1 5/8")  Then the trick is making it right.  I have this two ton come-along to use.  For this wall (the biggest one) I was able to anchor to a post in the parking area and rick it straight, then finish nailing the sheer panel in place. 
               If I were building a single story on flat ground I might do the sheer on the ground, too, then stand the frame up.   (You can see a temporary diagonal brace in this pic.  It's only attached at the top and the bottom is resting freely on a block.  AS soon as the wall was straight that brace gets screwed in until the sheer panel can take over)

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