Lifting Walls and Initial Bracing

plate all the way down. This corner requires proper fastening so it doesn't spread apart because the top plates don't overlap. For a platform framed rake wall, it has overlap top plates and this is what keeps the walls from separating. If you platform frame and install a double top plate, it's easier to install your rake, but doesn't handle lateral forces as well. But platform framing a rake wall can be more forgiving. Roof pitch adds to the height of your structure and determine how low your rafters hang down depending on the size of your overhang. Steeper pitches allow water to flow better, but are harder to walk on, more expensive to have work done. Lower pitch roofs are easier to work on, but can be more of an issue for water and ice dams. For rafters, you'll measure your structure from end to end, then we'll cut that number in half, then subtract half your ridge, typically 3/4. 12 ft is 144 in / 2 gives us 72 in and then we'll subtract 3/4 of an inch and that gives us 71 and 1/4. This number will be our run and we'll do a 7-in pitch and our diagonal will be 82 and 1/2. We'll mark out our pitch, the bottom numbers are common, put down your square, turn up until the top lines up with number seven, make your mark, pull the measurement from our long end, mark 82 and 1/2, draw out another seven pitch. Now rotate your square and use this line to determine your seat