How To Build A Roof Over A Mobile Home

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Step from the point on the blade to the point on the tongueit need to be 14-7/16 inches (residential metal roofing). Multiply this by the run of the structure. We're using 10 feet in this example, leaving out the overhang. The resulting figure is 144-1/2 inches. We include 12 inches for the overhang to get a last figure of 156-1/2 inches.

Take a look at the rafter board to identify if there is any curve or "crown" in the board. You ought to make this first pattern rafter on the straightest board you can discover. If there is any curve in the board, set out the rafter so the crown is up or facing away from you.

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( If the crown were to be positioned down, the roofing system might ultimately droop.) Then lay out the rafter as revealed on the next page. This example is for a roofing system with an 8/12 pitchPosition the square at the end of the rafter board, with the tongue on your left and dealing with away from you.

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Mark along the behind of the tongue. This is the plumb cut for the roofing ridge. Measure form the top of this line down the board to identify the line length, or length of the rafter, less the ridge board. This typically is a 2-by or 1-1/2- inch board, so the measurement is less inches.

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Holding the square in the very same position as in the past, mark down to the side of the tongue. This marks the plumb cut at the within your home wall for the notch (called a bird's mouth) to seat the rafter one the wall plate. Add the length of the overhang beyond this mark and mark it.

In the example revealed this is 12 inches. Cut the rafter at the ridge line and at the overhang line. Then hold the square on the plumb line that marks the bird's mouth. Determine the wall density or depth of the bird's mouth cut and make a mark - metal roofs. Cut the notch, first with a handsaw or portable circular saw, and after that complete the cut with a handsaw.

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Continue moving down the rafter and marking plumb cuts, including any odd figures. One approach of laying out rafters with a square is called "stepping off." Make a replicate rafter from the pattern. CertainTeed roofing. Then lay the rafters out on a smooth, flat surface, with a 2-by in between them at the ridge line.

You might wish to check these on the building before cutting the remainder of the rafters. As soon as you make certain these two pattern rafters are correctly cut, mark them as patterns and mark and cut the essential variety of rafters. If the building has hanging or "fly" rafters for the gable ends, cut them too.

Ensure you carefully follow the pattern rafter. A number of years ago I was building a two-story building. One carpenter laid out and began to cut the rafters. He ended up being ill from the extreme heat of the day and another carpenter took control of for the last third of the rafters.

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I do not understand if the second carpenter didn't utilize the pattern rafter, or just wasn't as precise, but it was a costly mistake. The brand-new C.H. Hanson Pivot Square makes the chore of setting out a roofing system quite simple. I wish I had this tool a number of years and structures ago.

It includes its own durable belt holder that is likewise created to hold a carpenter's pencil and the direction brochure. The brand-new C.H. Hanson Pivot Square makes it eady to set out rafters. this quality tool features its own belt pouch and has dividers for the square, an instruciton handbook and a carpenter's pencil.

Degrees and rise are marked on a blade connected to the rotating arm. With the common increase figures facing you, and the raised fence on the right, the bottom represents the base of the triangle (the run) and the ideal side the elevation (the rise). The long adjustable edge represents the hypotenuse of the triangle, or the line length.

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Merely adjust the square to the desired pitch and lock in place with the knurled knob. You can then use the square to move the angle for the cut to the lumber. Or you can hold the square in place and utilize it as a durable guide for running a portable circular saw.

Identify the pitch, then you can set a miter saw or substance miter saw to make cuts in degrees that conform to the wanted pitch. The Pivot Square can likewise be used to lay out pitches steeper than 12/12, in addition to to lay out hip-valley rafters. These figures are determined on the rear end of the square.



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