I couldn’t remember if OWL was correct haven’t done sheet metal in years thanks for the short simple reminder TH-cam needs more videos like this for those who just need a quick refresh to assure the memory lol
The problem with cutting a simple miter as you've done here is that your duct grows. Small offsets aren't usually a problem but when you get into bigger offsets it will. I always train people in 3 piece offsets so your makeup matches and never grows. To do that, you need to make an arbitrary travel length in the middle of the duct in which the length is never shorter than the offset itself. You use the OWL formula only in the travel piece then divide your OWL x2. Lay out both side of the travel piece (add one inch to your travel AFTER using OWL if you're using a slip and drive connection), cut it out, then flip the center over. Put the three pieces back together and you're done. This also allows you to get a more accurate length on your total piece as you can just trim a little off of one end of the makeup to get it to fit perfectly and looks much cleaner.
I used this app I developed to calculate square offsets on Android phones. Works fine on site instead of guess work or eyeballing it... play.google.com/store/apps/details?id=com.simpleoffsetpro&hl=en_IE
Thanks for this tutorial. I had to fabricate my own 90 short way elbows because I couldn’t find any at the local home centers. Took me a little bit but disgusted out two ways of doing it.
The best way to offset ducts is the the three Piece offset. I usually do it just like i bend conduit . If you have to offset over 10 inches you have to use a speed square and use a 30 degree angle so you mark it on 15 degrees then make the line . After that you use your tape to measure over 10”(offset)x 2(30 degrees multiplier)+2” for s&d connection. Witch will add up to 22” . Then from that point you use your speed square again just like the first step.. you will now have 3 pieces.
Nice video you can do this a few ways with measuring width using half the distance to make your second mark then that is your first cutting angle. from those two marks measure 4.5 more inches from the first angle you just created for your second marks. I would like to see you make a true 45-degree angle in any duct video. Would you use this method with that also? offset x width / length = cut? just wondering what a true 45 is so when you have a reducer in the middle of the next offset and the duct size changes. How do you correct the true 45 in that scene?
Dumb question but if you were to cut on the longer side will the Width change? Like for example let’s say your duct shown in the video is 16x8 and I want to cut it the other side will the OWL be: 4.5x16/20 ?
When plugging in your measurements into the O.W.l formula, will the width vary according to which way you are offsetting? Example ; let's say you have a 14"x8" and you want to offset to the side(left or right ), will then the 14" becomes the width since it will be getting cut?
I'm glad I saw this review bc 20 inches s slip look like 20" long too..now I understand offset × width which means at this video up and down offset..( the drive side)÷ the length of the connection of drive to drive length
if your offset is originally 4.5 inches how did it shrink to 1.8...is the point of this method to be able to just tap some rectangle duct together then make the offset appear after its put together rather than to make like a 4 piece transition measuring out the offsets on the separate peices?
ok I understand the offset part but I am lost bcuz u don't explain where u get ur width or ur length from? I read on one of the comments that ur 20 is the space u needed between ducts but where do u get width from ....i would appreciate u sharing that with it would help me a lot in my job....thanks for ur vid and time
where did you get your length from? If I want it for a wait that's 20in long how long my duct has to be before I cut it knowing that I will loose some length after the offset is cut off and what if you do it with TDC Joints you don't have to add the 2 in?
The one is obviously one inch, the .8 can be found out by multiplying by 16. You'll get 12.8, rounded up to the nearest whole # would be 13, so its 13/16". There is 13/16 in .8 of an inch. This can be done with 32nds and 64ths if your splitten hairs.
Don't need to cut inch for the s just snip the corners so you can bend them down to level. Also you'll find if you cut them a inch depending on your cut you won't get your hooks close enough. Always go half inch
The width used in the OWL formula uses the width of the side of the duct that is in the same direction of the offset. If you need a up or down offset you will actually replace the width with height for the equation. But if you need a left or right offset you will use the ducts width. Hope that makes sense.
So when you want to do a offset with the owl formula you put your offset measurement times drive with means height.. then you divide length which I am confused the length of the duck or the length of the S Drive
Ok. So this can be SOOOO MUCH EASIER! 1st, why did you put the duct together? It's a lot easier to cut when it's not together. B: why are you marking an inch for seams? They're implied. The length is what it is. Lastly, your bird method is nerdy. Go to a wall, measure the length of the offset off the wall and mark the floor. Place your cut length at that mark and tilt it to the wall and measure the the gap from the floor to the corner of your piece. That's the cut. None of this converting .8 to 3/4 math (which was wrong btw). I actually have to do this today so maybe I can be a you tube guy and show you how much quicker and easier the big boys do it. Funny how ya didn't show what a pain in the ass it was to cut that duct after it was knocked together. Rooky
I was in the field the other day had no idea how to make an offset. watch this video one time and now your man's a pro. perfectly explained.good job
I couldn’t remember if OWL was correct haven’t done sheet metal in years thanks for the short simple reminder TH-cam needs more videos like this for those who just need a quick refresh to assure the memory lol
The problem with cutting a simple miter as you've done here is that your duct grows. Small offsets aren't usually a problem but when you get into bigger offsets it will. I always train people in 3 piece offsets so your makeup matches and never grows. To do that, you need to make an arbitrary travel length in the middle of the duct in which the length is never shorter than the offset itself. You use the OWL formula only in the travel piece then divide your OWL x2. Lay out both side of the travel piece (add one inch to your travel AFTER using OWL if you're using a slip and drive connection), cut it out, then flip the center over. Put the three pieces back together and you're done. This also allows you to get a more accurate length on your total piece as you can just trim a little off of one end of the makeup to get it to fit perfectly and looks much cleaner.
That’s how I was trained. Old union guy trained me and is still teaching me more 😂😂
Please make a video there’s hardly any videos of how to make offsets
Speed square works every time
I’ve been looking for this for a while. Thank you
Nice video. Short and to the point.
I used this app I developed to calculate square offsets on Android phones. Works fine on site instead of guess work or eyeballing it... play.google.com/store/apps/details?id=com.simpleoffsetpro&hl=en_IE
May the stars bless you with good and abundent customers!🙏
Stars doesn't bless no body🤔
Thanks for this tutorial. I had to fabricate my own 90 short way elbows because I couldn’t find any at the local home centers. Took me a little bit but disgusted out two ways of doing it.
I practice the method, thanks for sharing knowledge.
Enrique gudiño. Exactly.
Sweet. Thanks for sharing!
nice vid. thanks for the info
The best way to offset ducts is the the three Piece offset. I usually do it just like i bend conduit . If you have to offset over 10 inches you have to use a speed square and use a 30 degree angle so you mark it on 15 degrees then make the line . After that you use your tape to measure over 10”(offset)x 2(30 degrees multiplier)+2” for s&d connection. Witch will add up to 22” . Then from that point you use your speed square again just like the first step.. you will now have 3 pieces.
Great vid
Nice video you can do this a few ways with measuring width using half the distance to make your second mark then that is your first cutting angle. from those two marks measure 4.5 more inches from the first angle you just created for your second marks.
I would like to see you make a true 45-degree angle in any duct video. Would you use this method with that also? offset x width / length = cut? just wondering what a true 45 is so when you have a reducer in the middle of the next offset and the duct size changes. How do you correct the true 45 in that scene?
Dumb question but if you were to cut on the longer side will the Width change? Like for example let’s say your duct shown in the video is 16x8 and I want to cut it the other side will the OWL be: 4.5x16/20 ?
Great video. What about if you want to set left or right?
Same formula. Actually in this example he did offset X height div by length = cut
Thanks buddy
Would it be offset times heights on a up or down offset ,and offset times width on a side to side offset?
Yes
Thank you
When plugging in your measurements into the O.W.l formula, will the width vary according to which way you are offsetting? Example ; let's say you have a 14"x8" and you want to offset to the side(left or right ), will then the 14" becomes the width since it will be getting cut?
Jd Vera yes..the 8 side is for up and down
You're with will change based on the size duct you're using.. after you put your mark for your offset you need to add an inch for your s and drive
can you do a video on a double miter?
I find it easier to cut it before it’s assembled... that way the S and Drive notches are easier to cut out but still good vid. 👍
Does it work in all measurements for sheet metal.
did you start with the length being 20 inches or is that what you need to fit in that space?
that's what i needed to fit in the space but it would work either way.
Whats the best way to measure your overall length before the miter is done, assuming we are offsetting up at an angle?
I'm glad I saw this review bc 20 inches s slip look like 20" long too..now I understand offset × width which means at this video up and down offset..( the drive side)÷ the length of the connection of drive to drive length
@@josechicas2192 so the length is just the length from one c lock to the next
Thanks
if your offset is originally 4.5 inches how did it shrink to 1.8...is the point of this method to be able to just tap some rectangle duct together then make the offset appear after its put together rather than to make like a 4 piece transition measuring out the offsets on the separate peices?
Been 6 years had to double check if I knew what I was talking about... I do
ok I understand the offset part but I am lost bcuz u don't explain where u get ur width or ur length from? I read on one of the comments that ur 20 is the space u needed between ducts but where do u get width from ....i would appreciate u sharing that with it would help me a lot in my job....thanks for ur vid and time
The width is one of the dimensions of the duct. For example, if you are using 14" x 8" rectangle duct, your width would be 8 inches.
Tom Tomer 8” is the height
@@mofugger333 yes but the "offset" is up and down. So the "height" is used as the "width" of the offset.
TLDR: Tom is correct.
where did you get your length from? If I want it for a wait that's 20in long how long my duct has to be before I cut it knowing that I will loose some length after the offset is cut off and what if you do it with TDC Joints you don't have to add the 2 in?
Use the formula for your own situation 👍🏼 This is just an example.
@@comfortmaxxhvac9251 bullshit response.
I agree.. He's not from the Sheet metal Union
He's probably don't know about TDC is
You only need a half inch for your drive. You can snip the corners a inch for the s but I'd trim both just half inch. Good job on the video though
Yes but you need 1” for the s, then bend only the 1/2” for the drive like I did in the video
What is is a 6 by 6 duct?
This is a one piece Dog leg miter offset .
About to impress the fuck out of my foreman tomorrow hopefully haha
How did you get 1 3/4 out of 1.8 how did you convert it?
3/4 =12/16, .8 = roughly 13/16 metal is forgiving enough to not worry about that discrepancy.
Would that be considered a riser and not an offset?
No, its an offset.
I hope my app Simple Offset Pro helps 🙏
Wait where did you get the width and length from shouldn't be the width and length of your duct you have sitting there
Width if the duct and length of which the space I have to work with👍🏼
Technically a riser, but a cool trick nonetheless.
width =? the short side of the duct?
that’s what i’m trying to u understand
Why 1 and 3/4 is it because 1.8 is slightly under 2 inches everything else I understand
It’s sheet metal .1 of an inch isn’t going to make that much of a difference👍🏼
1.8 is exactly what on a tape measure
Gerald Davis 1inch 3/4
1 13/16
The one is obviously one inch, the .8 can be found out by multiplying by 16. You'll get 12.8, rounded up to the nearest whole # would be 13, so its 13/16". There is 13/16 in .8 of an inch. This can be done with 32nds and 64ths if your splitten hairs.
I tried this with grease duct and it didn't work out I'm not sure what I am doing wrong
What were your measurements? It doesn't work if the offset is too big or the length is too small.
S is half inch and drive
Fuckyoumean Haaa No, you still gotta notch that inch on all four corners but bend the half inch for the drive side. S is full inch
Don't need to cut inch for the s just snip the corners so you can bend them down to level. Also you'll find if you cut them a inch depending on your cut you won't get your hooks close enough. Always go half inch
Yeah I know guys thanks for responding I’m very good at my offsets now up or down or side ways 😁
No answers to any questions?
👍🏽
I d k
I’d go back to the fab shop and make an o.g. Offset at the end of the day imo
I wouldn’t want anyone to see an “owl” offset
That’s not width it’s your height, so what’s the formula now offset times heights divided length..?????
Eric Rogers I was thinking the exact same thing
The width used in the OWL formula uses the width of the side of the duct that is in the same direction of the offset. If you need a up or down offset you will actually replace the width with height for the equation. But if you need a left or right offset you will use the ducts width. Hope that makes sense.
So when you want to do a offset with the owl formula you put your offset measurement times drive with means height.. then you divide length which I am confused the length of the duck or the length of the S Drive
Ok. So this can be SOOOO MUCH EASIER! 1st, why did you put the duct together? It's a lot easier to cut when it's not together. B: why are you marking an inch for seams? They're implied. The length is what it is. Lastly, your bird method is nerdy. Go to a wall, measure the length of the offset off the wall and mark the floor. Place your cut length at that mark and tilt it to the wall and measure the the gap from the floor to the corner of your piece. That's the cut. None of this converting .8 to 3/4 math (which was wrong btw). I actually have to do this today so maybe I can be a you tube guy and show you how much quicker and easier the big boys do it. Funny how ya didn't show what a pain in the ass it was to cut that duct after it was knocked together. Rooky
Thank you