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How to Design your own Hip Roof Framing Plans. Also see Custom Designed Hip Roof Plans. Bryan Computer Engineer Powell Software Development. In this article I will try to show you how to design a simple . I will be referring to the example roof I have created for this. The only tools you will need to do this is a quality framing square giving you the.

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Also I will be using a 2x. Rafter material sizes can be changed easily and the lengths will. I measure all diagonal lengths at the top of the rafter material. I will give you the HAP measurements. This building example will represent a small garage or shed building and will not have. This calculation.

Building Width 1. Since. you can't multiply fractions and decimals you can convert the fraction 3/1. I have provided for you. Standard Gable Roofs: If you are building a standard gable roof you can using the method above determine. This length will also work. Figuring the ridge board you would want to. You can rip this overhang portion so as not to protrude.

Laying our your GABLE ROOF system you would measure from the outside of the wall top. Then. start your 1. Lets start with the rear wall in the. We now know the run is 6' 4 3/1. Once you have finished this you can then find. Laying out the hip rafter is. You will want to make sure your sheathing forms a correct square corner because you rafter must be set against it or the length will be changed from what it should be.

Once you have completed this, your layout would look like. The rest are the same but only called common rafters.

Working on the rear wall top plate you can now layout all of the common rafters in. It will work the same if you are setting your rafters on 2. And again the front corner. But this method would allow you to cut all four corners exactly the same. If you like you can figure the 1. You likely wouldn't have to cut more than two.

See figure #1. 1figure #1. Joist on. the front are offset 1 1/2. In that scenario jack rafters for corner sections 1, 2 and 3. Add Adobe Pdf Printer Windows 10.

If you look at the left end rear wall in. In order. to maintain the 1. You can simply measure over from the first common rafter with your framing. From there you would just deduct the difference in length on lines 3. The opposite side of that particular hip rafter in that corner. You would need to do the same thing on the front left corner section (section 2 as. And again on the front half of (section 3 as indicated.

Calculating the Jack Rafter Lengths: You can do this two ways, method A starts at the corner and comes inward toward the. It does require you to square the rafter up with the rear wall. Or you can us method 8 as shown in. A. As in our example building with 4. X1. 2 pitch under the number 4 you. To gain the other jack rafter lengths you would just add that.

The same will hold true if your building would have any other. Or. B. You will need to transfer the plumb line at the seat cut to the top of the rafter. From. that length deduct . Our. example pitch 4x. For your particular pitch you can mark. I have included the side cut angles from 4x.

Cutting your Common Rafters: Always sight your rafter material and lay it on your saw horses with the crown or bow. If. your material is close to the length you actually need work from the bottom for the top. I wouldn't recommend using a crown with more than 1/4. You can always. use a straight edge and rip the excess crown off. What we will layout first is your .

So looking at. we know that the HAP height or plumb line is 7 5/1. With your square in. Since your framing square. Now you have the. While you are there square the plumb line.

When you start cutting mark at least six on top in the same manner and label them for the four . You will want to cut this.

If your using smaller materials you might want. I would. say this holds true for material as small as 2x. But I have one more piece of advice. Using a scrap piece of 1 x. You want to flush the material at the top and at the bottom over the HAP or plumb line. If you try to flush it at the end. You already have the length so site you material putting the crown up and go.

Don't cut it yet though. You may have a wide structure and. If that is the. case lay your ridge board out as far as you can go and when you get to the left end cut. I said don't cut it yet and here is why. If your outside walls. I recommend adding an additional 3. You can always cut it in the air.

See. figure #5b. Cutting the Hip Rafters: Hip rafters are always marked out using 1. This angle is not a normal 4.

I have drawn. them out for you in. Once they are up you can install.

Then apply a 2x. 6 up right beside. You can even lay some of your roof. You can use it on the roof. Setting the First Common Rafters: With your six first common rafters cut you can start setting them in order as I have. Now slide your ridge.

Don't lift either one up as you go. Nail rafters 1- 3 first and. Slide it inward about three inches and tack it to hold it in place. With that completed go to the left end and set your common. If everything is perfect it should be flush with the top and align. But it probably will not be exactly right for a number of good reasons.

Now you can install the remaining common rafters being sure to pull them tight against. I would recommend holding the top of the rafter a little high not. Now your hip roof should look like. Setting your four Hip Rafters: With your hip rafters cut you can install them now. You have already cut the drop. This will make the long point of the hip appear to be too low but it has to be. Setting you Jack Rafters: Installing the jack rafters is not hard at all though I would recommend setting the.

Again I would. recommend holding the top loose until the seat has been nailed completely and then nail. Cuts, notches and holes bored in trusses, structural. I- joists are prohibited except.

In this type of. hip roof for example the hip rafter is set on exactly 4. A gable roof would also be called a regular. Irregular Pitch Roof.

This roof type would be considered unequal or irregular because one surface of the. The hip rafter would not be on a 4. Most construction calculators can give you the diagonal length of a irregular hip.

If you. want to have overhang the hip overhang would have to be shortened on the irregular side. Equal Overhang. In the irregular pitch hip roof structure described above the over hang distance and. Double Cheek Cut Method. In this method of framing a hip roof the Hip Rafter will have a cheek cut on both. On the hip end there will only. In this method of building this causes the center ridge board.

In this builders experience this type or method of framing. Once you set the first common rafters front. Once this is done you would set the one.

Once both hips sections are complete you can. Rafter Seat. This would be the notch you cut in the bottom of the rafter which sets on top. In determining the seat cut you would. Birds Mouth. This is the same as the Rafter Seat above but called by another name by many carpenters. HAP. pitch can run for standard asphalt shingles from 3 1/2 to as high as you might want. In. most cases contractors would use a 4x. Code calls for a minimum of 1.

When using a very high pitch roof you. A simple example would be a building structure span of 2. This however is not the top of the ridge board. To obtain that vertical. HAP together to get a total rise.

The HAP or plumb line will be different for different roof pitches and for. Gable Roof. A gable roof has only two sides, causing each end to rise upward to the center point. Hip Roof. Hip roofs will typically have four sides sloping upward to the center point. The regular. hip roof will have four hip corners all connecting at the ridge line. Shed Roof. Shed roofs often connect to another body and slop in one direction and has only one side.

First Common/King Rafter. This rafter along with the hip end common rafter create the hip end and are erected. This rafter is the same as. Hip Rafter. The hip rafter is the corner rafter and is at a lower pitch angle than the common. Jack Rafter. Jack Rafters are on the same pitch as the common rafters on a regular pitch hip roof.

Building Overhang.