I made a bird feeder. I wanted a gambrel roof. I made a 45 deg roof
lead into a 35 deg roof. I didn't know the right angles for the
gambrel roof and I made the 45 deg mark on the edge of the wood and
then cut it and then put the square at the end of the 45 deg cut and
found 35 deg. and cut that. Next time I will mark both angles from the
edge of the wood. Starting with 60 deg leading into a 30 deg roof.
Jaime
"Dave jackson" <[email protected]> wrote in message news:<[email protected]>...
> I'm not quite sure what you are trying to accomplish here, but I'll offer
> some info and hope it helps. If not, be more specific, and I can try to be
> more focused with the answer. Also, I'm going from memory here, so double
> check my figgers please. It sounds as if you are trying to make a 21/12
> pitch (the 60deg) roof lead into a 7/12 pitch (the 30deg) roof . If you are
> using a standard carpenters square, line up the 7" mark with the edge of the
> board and the 12" mark with the same edge of the board. This gives the 30
> deg angle (7/12 pitch). To get the "long 30" as we call it when framing,
> line up the 7" mark again and the 17" mark. This will give your 60. If you
> do not own a Swanson Speed Square, get one with the little blue instruction
> manual. These are one of the greatest carpenters tools ever invented and
> will be your greatest aid cutting the angles for any roof system. Probably
> around $10 and in every small hardware store/borg in the nation. --dave
>
>
>
> "Australopithecus scobis" <[email protected]> wrote in message
> news:[email protected]...
> > On Sat, 20 Nov 2004 15:30:51 -0800, jaime steward wrote:
> >
> >> I did a quick search and found that common gambrel roof angles are 30
> >> and 60 degrees. Starting with a piece of 1x 6 cedar. I know how to
> >> make the 30 degree cut. What reference point do you put the square to
> >> make a correct 60 degree cut.
> >>
> > y _
> > h(2) /| b( v3 / 2 )
> > /_|
> > x(60) a(1)
> >
> > Hokay. You want angle x to be 60 deg. Side a will be one half the length
> > of side h. For your 30 deg angle y, side b is half the square root of 3,
> > which, IIRC, is irrational, and not easy to measure on your ruler. Or, you
> > can run down to the art supply store and get a 30-60-90 plastic triangle.
> >
> > --
> > "Keep your ass behind you"
> >
On 20 Nov 2004 15:30:51 -0800, [email protected] (jaime
steward) calmly ranted:
>I did a quick search and found that common gambrel roof angles are 30
>and 60 degrees. Starting with a piece of 1x 6 cedar. I know how to
>make the 30 degree cut. What reference point do you put the square to
>make a correct 60 degree cut.
Are you making the half-octagon gambrel roof or the hat-shaped gambrel
roof? The hat-shaped (barns with wings) uses odd angles.
That means you make 15° cuts on each side for each complementary angle
for the peak, the very top of the hat. The outside of those two boards
get cut at 30° each making a 60° angle. There is no 60° cut.
For the normal half-octagon gambrel, make all cuts 30°. Fit
birdsmouths on the bottom of those near-vertical sticks to the framed
walls as necessary.
Perhaps you should get a set of plans. These 100 ought to help:
http://www.google.com/search?num=100&q=free+Gambrel+Shed+Plans
-- Friends Don't Let Friends Eat Turkey and Drive --
On Sat, 20 Nov 2004 15:30:51 -0800, jaime steward wrote:
> I did a quick search and found that common gambrel roof angles are 30
> and 60 degrees. Starting with a piece of 1x 6 cedar. I know how to
> make the 30 degree cut. What reference point do you put the square to
> make a correct 60 degree cut.
>
y _
h(2) /| b( v3 / 2 )
/_|
x(60) a(1)
Hokay. You want angle x to be 60 deg. Side a will be one half the length
of side h. For your 30 deg angle y, side b is half the square root of 3,
which, IIRC, is irrational, and not easy to measure on your ruler. Or, you
can run down to the art supply store and get a 30-60-90 plastic triangle.
--
"Keep your ass behind you"
I'm not quite sure what you are trying to accomplish here, but I'll offer
some info and hope it helps. If not, be more specific, and I can try to be
more focused with the answer. Also, I'm going from memory here, so double
check my figgers please. It sounds as if you are trying to make a 21/12
pitch (the 60deg) roof lead into a 7/12 pitch (the 30deg) roof . If you are
using a standard carpenters square, line up the 7" mark with the edge of the
board and the 12" mark with the same edge of the board. This gives the 30
deg angle (7/12 pitch). To get the "long 30" as we call it when framing,
line up the 7" mark again and the 17" mark. This will give your 60. If you
do not own a Swanson Speed Square, get one with the little blue instruction
manual. These are one of the greatest carpenters tools ever invented and
will be your greatest aid cutting the angles for any roof system. Probably
around $10 and in every small hardware store/borg in the nation. --dave
"Australopithecus scobis" <[email protected]> wrote in message
news:[email protected]...
> On Sat, 20 Nov 2004 15:30:51 -0800, jaime steward wrote:
>
>> I did a quick search and found that common gambrel roof angles are 30
>> and 60 degrees. Starting with a piece of 1x 6 cedar. I know how to
>> make the 30 degree cut. What reference point do you put the square to
>> make a correct 60 degree cut.
>>
> y _
> h(2) /| b( v3 / 2 )
> /_|
> x(60) a(1)
>
> Hokay. You want angle x to be 60 deg. Side a will be one half the length
> of side h. For your 30 deg angle y, side b is half the square root of 3,
> which, IIRC, is irrational, and not easy to measure on your ruler. Or, you
> can run down to the art supply store and get a 30-60-90 plastic triangle.
>
> --
> "Keep your ass behind you"
>