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Country Discussion Topics
To add your comments to this topic, click on one of the 'Reply' links below.

OK Clod
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buck    Posted 07-03-2003 at 19:41:11       [Reply]  [No Email]

It is your first day on the job and the boss drops you off at a projet and tells you to cut the rafters for the 24' x 24' building that already has the walls up. Tells you he will be back after lunch, hands you a folding carpenters rule, one nail and a saw and says thats a 5/12 pitch. Other than your PB&J sandwich and a bottle of water this is all you have to work with. What is the rafter length? Note: any overhang is up to you but not part of the rafter length.

bob ny    Posted 07-04-2003 at 04:01:40       [Reply]  [No Email]
i don't know about roofs but i saw acarpenter putting siding on one day he would reach in his apron grab some nails hammer in one throw away a couple and hanner some in and throw away some his boss came over and asked him why he was throwing away so many nails he said the heads were on the wrong end the boss said dummy they are for the other side of the building

LOL...    Posted 07-04-2003 at 04:48:35       [Reply]  [No Email]
I know that guy...

Both guys actually...


Vic    Posted 07-04-2003 at 03:53:17       [Reply]  [No Email]
I noticed you wanted to know the length of a rafter for a 24 by 24 building and that would be 24 ft. now if you want to know the hight at a 5 1/2 inch to one pitch that would be 5 ft in higth. so your question is flawed and all the answers are incorrect. I just love it when a bricklayer has to splain things to a carpenter.

Salmoneye    Posted 07-04-2003 at 04:47:43       [Reply]  [No Email]
5/12 (five/twelve) is the pitch...Not 5 1/2...


screaminghollow    Posted 07-04-2003 at 02:31:44       [Reply]  [No Email]
simple 9th grade geometry, Assuming the peak of the roof is to be over the middle, which means 12 feet from the sides. which just happens to be part of the pitch. five foot drop for every 12 feet makes the formula (5x5) + (12 x 12)= 169 the square root of 169 is 13 so the length of the rafter without any overhang is 13feet.
on a right triangle, one with a 90 degree corner, the square of the shortest side plus the square of the middle length side equals the square of the longest side. No table on a carpenter square or rule needed for this one.

Salmoneye    Posted 07-04-2003 at 04:45:55       [Reply]  [No Email]

That Pythagorus was a hoot, eh?

Terrible dancer though...

Clod    Posted 07-03-2003 at 20:01:29       [Reply]  [No Email]
ou dont know my boss Buck.He knows better than to put me on a rafter job,He IS A wise man!.This is not dozer work like a 3 to one slope. 5 1/2 pitch? 5 and 1/2 inch rise /drop to a foot? I dont know how a pro would do it thought I seen plenty doing just that. But here is how I would do.Lay the 2x on a flat surface,Mark off 12 ft ( Is halfway of building) Figure NOPE!! NOW you got me..5 1/2 is what? You just got me fired Buck! Now..You can teach me that trick..I have put up smalll buildings but did the rafters on a flat and just made the slope to be a foot in the center.No boss to give me the 5 1/2 problem.

bill b va    Posted 07-04-2003 at 00:41:45       [Reply]  [No Email]

how long is a 6 foot carpenter's rule ?

bob w    Posted 07-04-2003 at 03:51:15       [Reply]  [No Email]
it depends on two things 1 is it all there 2 how much is it unfolded

Vic    Posted 07-04-2003 at 03:57:44       [Reply]  [No Email]
How long has it been since it has been oiled?

buck    Posted 07-03-2003 at 20:14:32       [Reply]  [No Email]

Thats 5/12 or 5" of rise for each 12" of span of the rafter and it just happens if you use the method of the span (12') in feet plus the span in inches that you will get your rafter length which in this case is 13'

Clod    Posted 07-03-2003 at 20:20:28       [Reply]  [No Email]
OH BOY!! 12 feet! Yes!!Not 51/2 per ft.. Yes If I would have only knew that I could have saved my job.Do you pay unemployment Buck?

buck    Posted 07-03-2003 at 20:33:02       [Reply]  [No Email]

well no unemployment but I did make 5 dollars today so you better report to work tomorrow.No Wait! that is the 4th of july--paid holiday.

Clod    Posted 07-03-2003 at 20:40:25       [Reply]  [No Email]
I made 10 bucks today playing on the PC..I work installing a treated wood deck tomarrow.My boss will be golfing .Ha ha~ Slave driver!

DeadCarp - i know    Posted 07-03-2003 at 19:54:42       [Reply]  [No Email]
The folding rule has all the numbers worn off, and when he asks the boss about it, the boss sez no problem, he's used that thing for so long, he remembers where they all were!
Same boss has a hammer he's used since he was a kid - only replaced the handle 3 times and the head twice. heh heh

buck    Posted 07-03-2003 at 20:03:49       [Reply]  [No Email]

Yes you do. In a round about way you gave the correct answers. Can you explain your clues.

DeadCarp    Posted 07-03-2003 at 20:34:11       [Reply]  [No Email]
I did? hmmm :) If the walls were already up, i'd mark the bottom plate from a corner, one 5 feet down and the other 12 feet over, then poke an uncut rafter thru the walls to touch both marks and maybe another one on edge right down the middle of the building, allowing for the ridge width and scoot the rafter down 2 inches from the 5 foot mark to allow for the tail cut. After you get the first one cut and tried, mark it with an X on both sides and use it for a pattern. Don't know what to do with the nail and string -- One thing i do know though, you don't need to mark a square line when using a handsaw - just get the saw ready, watch at the blade and keep the reflection of the far edge straight - the cut'll be square.

Clod    Posted 07-03-2003 at 20:46:36       [Reply]  [No Email]
Ive put nails on a plywood wall.stick the hangover out.The rafter top end at half the building distance.A one foot rise from bottom edge of wall,do the opposite rafter up to it..All the angles are there to just draw a verticle line through.But if a real carpenter is looking I would be handed my lunch kit.

Clod    Posted 07-03-2003 at 20:17:55       [Reply]  [No Email]
>> Yes you do. In a round about way you gave the correct answers. Can you explain your clues. << The language of carpenters is nothing I can relate too.But the working with angles is in other trades but diffrent language to measure slopes . Just between you and me Buck.I bought a Johnson angle indicator for 8 dollars.It looks like a speedometer .Magnetic base.It can do wonders for me if I use a board raised so much per foot I can read the angle and fake it with the pro beside who knows his job.But then he will hit me with more carpenters talk and say..Hey fool,,Can you cut it here or not? ha ha~

buck    Posted 07-03-2003 at 20:46:38       [Reply]  [No Email]

Try this one on your calculator. 7/12 (pitch)= inv,TAN =30 degrees. In other words if you cutting 7/12 rafter tails on your miter say just set it at 30 degrees a get on up. Your method is better but I ain't found a good way yet to keep that blamed thing in my tool bag.

Clod    Posted 07-03-2003 at 21:10:36       [Reply]  [No Email]
If you get a big legal pad and set and draw long enough you will think up easy ways to do angles and things like that.Graphics look like the work and it makes sense.You get the idea better than words and the math talk.You alread know what you are going for the the picture gives you the best ideas..But if you go loking at big harware stores you find a neat tool that saves your brain for fun things like fishing thoughts while you work.I have so little brainpower I have to conserve as much as I can for vital operations..Like fishing..Se ya tomarrow Buck..Have a fine forth.

Clod    Posted 07-03-2003 at 20:03:05       [Reply]  [No Email]
Im already fired Dead Carp..Even with new stuff Im lost at the 5 1/2 thing.

DeadCarp    Posted 07-04-2003 at 03:58:43       [Reply]  [No Email]
Ya can't fire me - i already quit! Some boss you turned out to be - you dropped us guys off and forgot to leave the shovels - heck we had to lean on the wall til you came back! heh heh

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