C

"Contrarian"

29/05/2015 3:07 AM

measure twice cut once





the hardware store cut the plywood into pieces about 1/8 too short.

I can still use them but not quite as planned.


This topic has 43 replies

Sk

Swingman

in reply to "Contrarian" on 29/05/2015 3:07 AM

29/05/2015 4:59 PM

On 5/29/2015 4:24 PM, -MIKE- wrote:
> In any case, I cringe every time I hear the saws at my local HD. They
> sound so dull, it makes your teeth hurt. :-) I'm guessing they've
> gone through their fair share of metal and never got replaced.

Bad, but not nearly as bad as that dull bit scream of a router that came
out of white ford van...

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Ll

Leon

in reply to "Contrarian" on 29/05/2015 3:07 AM

04/06/2015 5:07 AM

Martin Eastburn <[email protected]> wrote:
> They don't make 4x8' anymore. It is all metric and is close to that
> size. Check the thickness of a 1/2" or 3/4" board...
>
> Martin
>

I buy plywood











> On 5/31/2015 2:27 PM, [email protected] wrote:
>> On Sun, 31 May 2015 12:08:01 -0500, Leon <lcb11211@swbelldotnet>
>> wrote:
>>
>>> On 5/30/2015 12:46 AM, DerbyDad03 wrote:
>>>> On Friday, May 29, 2015 at 10:17:17 PM UTC-4, Ed Pawlowski wrote:
>>>>> On 5/28/2015 11:07 PM, Contrarian wrote:
>>>>>> the hardware store cut the plywood into pieces about 1/8 too short.
>>>>>>
>>>>>> I can still use them but not quite as planned.
>>>>>>
>>>>>>
>>>>> Some stores will only cut oversize for that reason. You have to trim
>>>>> them, but if an error, it will be on you.
>>>>
>>>> I thought they cut oversize to sell you more wood.
>>>>
>>>> "Can you please cut this sheet of plywood in half?
>>>>
>>>> "I'm sorry, we have to cut it at 48 1/2". You'll have to go get a
>>>> second sheet if you want two 48" pieces."
>>>>
>>>> ;-)
>>>>
>>>
>>> You realize that NO ONE can cut a sheet of plywood in half and end up
>>> with two 48" wide pieces, right? ;~)
>> Unless you start with a "standard oversized" sheet at 5X10 ft (3150 X
>> 1530mm)
>>

Ll

Leon

in reply to "Contrarian" on 29/05/2015 3:07 AM

04/06/2015 5:14 AM

Swingman <[email protected]> wrote:
> On 6/3/2015 9:07 AM, John Grossbohlin wrote:
>
>> I guess we need to invent a "zero kerf/zero swarf" cutting method to
>> solve this problem... maybe a hydraulic "paper cutter" or "pizza cutter"
>> device would work? ;~)
>
> When building base cabinets that are traditionally 24" deep, I minimize
> waste (IOW, getting two, correctly grain oriented, end panels for the
> cabinet sides out of one 48" width sheet) by cutting the end panels 23
> 15/16" wide, then cut the dadoes in the FF's to receive the end panels
> 3/16" deep, instead of 1/4".
>
> That way I end up with an assembled base cabinet that is precisely 24" deep.
>
> Sounds a bit anal, but we often build for spaces that don't yet exist, so
> religiously maintaining that type of precision throughout a project keeps
> cumulative errors from causing problems during installation.


Wouldn't that make the cabs precisely 24-1/2" deep?

Ll

Leon

in reply to "Contrarian" on 29/05/2015 3:07 AM

03/06/2015 8:48 AM

On 6/1/2015 11:37 AM, Just Wondering wrote:
> On 6/1/2015 8:26 AM, Swingman wrote:
>> On 5/31/2015 2:27 PM, [email protected] wrote:
>>> On Sun, 31 May 2015 12:08:01 -0500, Leon <lcb11211@swbelldotnet>
>>> wrote:
>>
>>>> You realize that NO ONE can cut a sheet of plywood in half and end up
>>>> with two 48" wide pieces, right? ;~)
>>> Unless you start with a "standard oversized" sheet at 5X10 ft (3150 X
>>> 1530mm)
>>
>> Nope, not if you cut it "in half", as clearly stated.
>>
> If you start with plywood that is exactly 96" wide and cut it exactly in
> half, assuming the saw blade is a typical 1/8" thick, the pieces won't
> be 48", they'll be 47 15/16".

;~) Hey, YOU "get it" too.



DB

Dave Balderstone

in reply to "Contrarian" on 29/05/2015 3:07 AM

29/05/2015 4:43 PM

In article <[email protected]>, -MIKE- <[email protected]>
wrote:

> My guess-- he marked the measurement, then cut on the "keep" side of the
> mark instead of the waste side. I usually put an X on the side of the
> measurement I want the blade to cut to avoid such brain-farts.

I either use an X or make a check mark with the long stroke to waste
side.

--
Splinters in my Fingers blog: <http://woodenwabbits.blogspot.com>

Pp

Puckdropper

in reply to "Contrarian" on 29/05/2015 3:07 AM

29/05/2015 4:01 AM

"Contrarian"<[email protected]> wrote in news:mk8l5b$pue$1
@odin.sdf-eu.org:

>
>
>
>
> the hardware store cut the plywood into pieces about 1/8 too short.
>
> I can still use them but not quite as planned.
>

Last time that happened, I had only the guy in the mirror to blame.
Fortunately, I don't have a mirror in my shop so he didn't have to endure
my wrath. :-)

If it's important that a piece not be under a specific size, there's two
ways to handle it: Have the piece cut oversize and recut it yourself, or
tell the guy doing the cutting about the requirement. I usually use the
first method, but have occasionally used the second method.

Puckdropper
--
Make it to fit, don't make it fit.

JW

Just Wondering

in reply to "Contrarian" on 29/05/2015 3:07 AM

01/06/2015 10:37 AM

On 6/1/2015 8:26 AM, Swingman wrote:
> On 5/31/2015 2:27 PM, [email protected] wrote:
>> On Sun, 31 May 2015 12:08:01 -0500, Leon <lcb11211@swbelldotnet>
>> wrote:
>
>>> You realize that NO ONE can cut a sheet of plywood in half and end up
>>> with two 48" wide pieces, right? ;~)
>> Unless you start with a "standard oversized" sheet at 5X10 ft (3150 X
>> 1530mm)
>
> Nope, not if you cut it "in half", as clearly stated.
>
If you start with plywood that is exactly 96" wide and cut it exactly in
half, assuming the saw blade is a typical 1/8" thick, the pieces won't
be 48", they'll be 47 15/16".

Pp

Puckdropper

in reply to "Contrarian" on 29/05/2015 3:07 AM

03/06/2015 2:56 PM

"John Grossbohlin" <[email protected]> wrote in
news:[email protected]:

>
> I guess we need to invent a "zero kerf/zero swarf" cutting method to
> solve this problem... maybe a hydraulic "paper cutter" or "pizza
> cutter" device would work? ;~)
>

I'd suggest a giant "LAY-ZER". I'll use it to cut your wood unevenly
unless you pay me... ONE MILLION DOLLARS!!!

Puckdropper
--
Make it to fit, don't make it fit.

Dt

DerbyDad03

in reply to "Contrarian" on 29/05/2015 3:07 AM

29/05/2015 10:46 PM

On Friday, May 29, 2015 at 10:17:17 PM UTC-4, Ed Pawlowski wrote:
> On 5/28/2015 11:07 PM, Contrarian wrote:
> > the hardware store cut the plywood into pieces about 1/8 too short.
> >
> > I can still use them but not quite as planned.
> >
> >
> Some stores will only cut oversize for that reason. You have to trim
> them, but if an error, it will be on you.

I thought they cut oversize to sell you more wood.

"Can you please cut this sheet of plywood in half?

"I'm sorry, we have to cut it at 48 1/2". You'll have to go get a second sheet if you want two 48" pieces."

;-)

Sk

Swingman

in reply to "Contrarian" on 29/05/2015 3:07 AM

30/05/2015 10:31 AM

On 5/30/2015 12:46 AM, DerbyDad03 wrote:

> You'll have to go get a second sheet if you want two 48" pieces."

Absolutely correct, no matter how you cut it. ;)

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Wood Shop: www.e-WoodShop.net
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Ll

Leon

in reply to "Contrarian" on 29/05/2015 3:07 AM

06/06/2015 4:55 PM

On 6/6/2015 1:38 PM, John McCoy wrote:
> Leon <lcb11211@swbelldotnet> wrote in
> news:[email protected]:
>
>>> 23-15/16 + 12/16 - 3/16 = 23-24/16 or 24-1/4
>>
>> Nope! 24-1/2" as I stated. 23-24/16 does not reduce to 24-1/4.
>>
>> 23-24/16 reduces to 24-8/16
>
> You're right. That's what I get for trying to do math
> in my head :-(
>
> John
>

;~) I think Swingman might have misstated. He and I have built 50+ of
those cabinets and face frames together. But he and I are both pretty
anal about cutting down waste.

JG

"John Grossbohlin"

in reply to "Contrarian" on 29/05/2015 3:07 AM

07/06/2015 12:57 AM

"Martin Eastburn" wrote in message news:[email protected]...

>So the 1/2" sheet measures out at a 12mm sheet that has large dimensions.
>They don't take 1/32 away from you for nothing.
>1/32 of a sheet of 1/2" is a loss of a layer. Loss of material
>and the dato blades have to be tuned less than the 1/2" of years ago.

It's not the loss of a layer per se... it's the difference between the
nominal thickness (e.g., 1/2" performance category) and the actual thickness
after sanding (e.g., 15/32"). To confound things there is actual 1/2"
plywood available... There are also performance ratings for structural uses,
e.g., that 15/32" sheet may perform as a 1/2" sheet in structural
applications. I'm not sure that stores like Home Depot that list the actual
dimensions rather than the nominal dimensions help the situation... locally
if I go into a yard that primarily caters to the trades and ask for 1/2"
CDX (I can get fir or pine) they know what I want. Ask the same question in
Home Depot and you may be told they don't have 1/2" CDX (as I have been
though I finally did locate it on my own).

This situation is not different from the nominal and actual sizes of
dimension lumber... as we all know a S4S 2"x4" is never 2"x4" but rather the
actual size is close to 1.5"x3.5" However, the actual size of a nominal
2"x4" is not a sure thing either as surfacing can occur before drying (noted
as S-GRN on the grade stamp) or after drying depending on the source. In
either surfacing case it's close enough for rough framing!

http://www.apawood.org/plywood has lots of information on plywood!

Ll

Leon

in reply to "Contrarian" on 29/05/2015 3:07 AM

03/06/2015 8:52 AM

On 5/31/2015 2:27 PM, [email protected] wrote:
> On Sun, 31 May 2015 12:08:01 -0500, Leon <lcb11211@swbelldotnet>
> wrote:
>
>> On 5/30/2015 12:46 AM, DerbyDad03 wrote:
>>> On Friday, May 29, 2015 at 10:17:17 PM UTC-4, Ed Pawlowski wrote:
>>>> On 5/28/2015 11:07 PM, Contrarian wrote:
>>>>> the hardware store cut the plywood into pieces about 1/8 too short.
>>>>>
>>>>> I can still use them but not quite as planned.
>>>>>
>>>>>
>>>> Some stores will only cut oversize for that reason. You have to trim
>>>> them, but if an error, it will be on you.
>>>
>>> I thought they cut oversize to sell you more wood.
>>>
>>> "Can you please cut this sheet of plywood in half?
>>>
>>> "I'm sorry, we have to cut it at 48 1/2". You'll have to go get a second sheet if you want two 48" pieces."
>>>
>>> ;-)
>>>
>>
>> You realize that NO ONE can cut a sheet of plywood in half and end up
>> with two 48" wide pieces, right? ;~)
> Unless you start with a "standard oversized" sheet at 5X10 ft (3150 X
> 1530mm)
>

Actually I believe you end up with just shy of 60" for each piece, not
48". ;~) To end up with two, 48" long pieces the sheet would have to
be 96" + the width of your saw blade kerf.

ME

Martin Eastburn

in reply to "Contrarian" on 29/05/2015 3:07 AM

03/06/2015 10:36 PM

Comes from Chile. The large tree farms there and lumber mills.

Martin

On 5/31/2015 8:24 PM, -MIKE- wrote:
>
> On 5/31/15 8:16 PM, Martin Eastburn wrote:
>> They don't make 4x8' anymore. It is all metric and is close to that
>> size. Check the thickness of a 1/2" or 3/4" board...
>>
>> Martin
>>
>
> Nope, just checked.
> It's dead on 48"x96", unless it's that crappy Chinese stuff I got that's
> not even square.
>
>

Sk

Swingman

in reply to "Contrarian" on 29/05/2015 3:07 AM

01/06/2015 9:26 AM

On 5/31/2015 2:27 PM, [email protected] wrote:
> On Sun, 31 May 2015 12:08:01 -0500, Leon <lcb11211@swbelldotnet>
> wrote:

>> You realize that NO ONE can cut a sheet of plywood in half and end up
>> with two 48" wide pieces, right? ;~)
> Unless you start with a "standard oversized" sheet at 5X10 ft (3150 X
> 1530mm)

Nope, not if you cut it "in half", as clearly stated.

--
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EP

Ed Pawlowski

in reply to "Contrarian" on 29/05/2015 3:07 AM

29/05/2015 10:17 PM

On 5/28/2015 11:07 PM, Contrarian wrote:
> the hardware store cut the plywood into pieces about 1/8 too short.
>
> I can still use them but not quite as planned.
>
>
Some stores will only cut oversize for that reason. You have to trim
them, but if an error, it will be on you.

EP

Ed Pawlowski

in reply to "Contrarian" on 29/05/2015 3:07 AM

29/05/2015 10:15 PM

On 5/29/2015 10:30 AM, Bill wrote:

>>>
> If there was no line, they probably used a different measuring tool. No
> two of mine seem to read the same.
>

In some pro shops there will be a board mounted on the wall. "If you
tape does not measure this at exactly 24" it is wrong and cannot be used"

Find a good one and adjust or discard the others.

ME

Martin Eastburn

in reply to "Contrarian" on 29/05/2015 3:07 AM

06/06/2015 9:20 PM

So the 1/2" sheet measures out at a 12mm sheet that has large
dimensions. They don't take 1/32 away from you for nothing.
1/32 of a sheet of 1/2" is a loss of a layer. Loss of material
and the dato blades have to be tuned less than the 1/2" of years ago.

Martin

On 6/5/2015 11:38 PM, dpb wrote:
> On 06/05/2015 8:22 PM, Martin Eastburn wrote:
>> Check the thickness. See if it is a real 3/4" or 1/2".
>
> Check the manufactuer's website spec's given earlier...they're in
> English units, 48x96 at thicknesses 1/32" under the nominal historical
> dimensions.
>
> Nobody's claiming you can take a length and remove a kerf thickness and
> have the initial total length and my only comment was that US
> manufacturers are still using English nominal measurements for at least
> construction ply; some furniture/cabinet-grade products are otherwise.
>
> --
>

ME

Martin Eastburn

in reply to "Contrarian" on 29/05/2015 3:07 AM

31/05/2015 8:16 PM

They don't make 4x8' anymore. It is all metric and is close to that
size. Check the thickness of a 1/2" or 3/4" board...

Martin

On 5/31/2015 2:27 PM, [email protected] wrote:
> On Sun, 31 May 2015 12:08:01 -0500, Leon <lcb11211@swbelldotnet>
> wrote:
>
>> On 5/30/2015 12:46 AM, DerbyDad03 wrote:
>>> On Friday, May 29, 2015 at 10:17:17 PM UTC-4, Ed Pawlowski wrote:
>>>> On 5/28/2015 11:07 PM, Contrarian wrote:
>>>>> the hardware store cut the plywood into pieces about 1/8 too short.
>>>>>
>>>>> I can still use them but not quite as planned.
>>>>>
>>>>>
>>>> Some stores will only cut oversize for that reason. You have to trim
>>>> them, but if an error, it will be on you.
>>>
>>> I thought they cut oversize to sell you more wood.
>>>
>>> "Can you please cut this sheet of plywood in half?
>>>
>>> "I'm sorry, we have to cut it at 48 1/2". You'll have to go get a second sheet if you want two 48" pieces."
>>>
>>> ;-)
>>>
>>
>> You realize that NO ONE can cut a sheet of plywood in half and end up
>> with two 48" wide pieces, right? ;~)
> Unless you start with a "standard oversized" sheet at 5X10 ft (3150 X
> 1530mm)
>

DM

Doug Miller

in reply to "Contrarian" on 29/05/2015 3:07 AM

29/05/2015 7:51 PM

-MIKE- <[email protected]> wrote in news:[email protected]:

> On 5/28/15 10:07 PM, Contrarian wrote:
>> the hardware store cut the plywood into pieces about 1/8 too short.
>>
>> I can still use them but not quite as planned.
>>
>
> My guess-- he marked the measurement, then cut on the "keep" side of the
> mark instead of the waste side. I usually put an X on the side of the
> measurement I want the blade to cut to avoid such brain-farts.

I mark my cuts with a pencil like this:

|- or -|

to show that the blade goes right, or left, respectively, of the line.

> I see hardware store saws as rough cutters for convenience. I would
> never use them for final cuts because I would never trust their
> accuracy, straightness, or for a clean cut.

Exactly so.

JM

John McCoy

in reply to "Contrarian" on 29/05/2015 3:07 AM

04/06/2015 2:39 PM

Leon <[email protected]> wrote in
news:[email protected]:

> Swingman <[email protected]> wrote:

>> When building base cabinets that are traditionally 24" deep, I
>> minimize waste (IOW, getting two, correctly grain oriented, end
>> panels for the cabinet sides out of one 48" width sheet) by cutting
>> the end panels 23 15/16" wide, then cut the dadoes in the FF's to
>> receive the end panels 3/16" deep, instead of 1/4".
>>
>> That way I end up with an assembled base cabinet that is precisely
>> 24" deep.

> Wouldn't that make the cabs precisely 24-1/2" deep?

How thick is the face frame? Assume it's 3/4:

23-15/16 panel
12/16 face frame
3/16 dado

23-15/16 + 12/16 - 3/16 = 23-24/16 or 24-1/4

If the face frame is 1/2, then it works out to 24 exactly.

John

JM

John McCoy

in reply to "Contrarian" on 29/05/2015 3:07 AM

06/06/2015 6:38 PM

Leon <lcb11211@swbelldotnet> wrote in
news:[email protected]:

>> 23-15/16 + 12/16 - 3/16 = 23-24/16 or 24-1/4
>
> Nope! 24-1/2" as I stated. 23-24/16 does not reduce to 24-1/4.
>
> 23-24/16 reduces to 24-8/16

You're right. That's what I get for trying to do math
in my head :-(

John

ME

Martin Eastburn

in reply to "Contrarian" on 29/05/2015 3:07 AM

05/06/2015 8:22 PM

Check the thickness. See if it is a real 3/4" or 1/2".

So much is metric that is close. Trimmed down and that is it.

If you have a local ply mill then the buyers might buy from it.

Depends on where the forest they use is. If in South America then
the ply comes from there. Lower cost to ship.

If from a local forest and mill structure - it might be metric or Imperial.

And cutting a 96" board in half won't give you 48" x 48".

Martin

On 6/4/2015 7:47 AM, dpb wrote:
> On 05/31/2015 8:16 PM, Martin Eastburn wrote:
>> They don't make 4x8' anymore. It is all metric and is close to that
>> size. Check the thickness of a 1/2" or 3/4" board...
> ...
>
> Last I checked on their web sites, the nominal manufacturers' exterior
> dimensions were still listed in inches...well, let's check again...
>
> Ayup...
>
> <http://www.buildgp.com/plytanium-plywood-sheathing>
>
> --
>

Sk

Swingman

in reply to "Contrarian" on 29/05/2015 3:07 AM

29/05/2015 12:28 PM

On 5/28/2015 10:07 PM, Contrarian wrote:

> the hardware store cut the plywood into pieces about 1/8 too short.
>
> I can still use them but not quite as planned.

Why woodworkers buy their own tools ...

--
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Wood Shop: www.e-WoodShop.net
https://www.google.com/+eWoodShop
https://plus.google.com/+KarlCaillouet/posts
http://www.custommade.com/by/ewoodshop/
KarlCaillouet@ (the obvious)

c

in reply to "Contrarian" on 29/05/2015 3:07 AM

31/05/2015 3:27 PM

On Sun, 31 May 2015 12:08:01 -0500, Leon <lcb11211@swbelldotnet>
wrote:

>On 5/30/2015 12:46 AM, DerbyDad03 wrote:
>> On Friday, May 29, 2015 at 10:17:17 PM UTC-4, Ed Pawlowski wrote:
>>> On 5/28/2015 11:07 PM, Contrarian wrote:
>>>> the hardware store cut the plywood into pieces about 1/8 too short.
>>>>
>>>> I can still use them but not quite as planned.
>>>>
>>>>
>>> Some stores will only cut oversize for that reason. You have to trim
>>> them, but if an error, it will be on you.
>>
>> I thought they cut oversize to sell you more wood.
>>
>> "Can you please cut this sheet of plywood in half?
>>
>> "I'm sorry, we have to cut it at 48 1/2". You'll have to go get a second sheet if you want two 48" pieces."
>>
>> ;-)
>>
>
>You realize that NO ONE can cut a sheet of plywood in half and end up
>with two 48" wide pieces, right? ;~)
Unless you start with a "standard oversized" sheet at 5X10 ft (3150 X
1530mm)

Ll

Leon

in reply to "Contrarian" on 29/05/2015 3:07 AM

06/06/2015 8:55 AM

On 6/4/2015 9:39 AM, John McCoy wrote:
> Leon <[email protected]> wrote in
> news:[email protected]:
>
>> Swingman <[email protected]> wrote:
>
>>> When building base cabinets that are traditionally 24" deep, I
>>> minimize waste (IOW, getting two, correctly grain oriented, end
>>> panels for the cabinet sides out of one 48" width sheet) by cutting
>>> the end panels 23 15/16" wide, then cut the dadoes in the FF's to
>>> receive the end panels 3/16" deep, instead of 1/4".
>>>
>>> That way I end up with an assembled base cabinet that is precisely
>>> 24" deep.
>
>> Wouldn't that make the cabs precisely 24-1/2" deep?
>
> How thick is the face frame? Assume it's 3/4:
>
> 23-15/16 panel
> 12/16 face frame
> 3/16 dado
>
> 23-15/16 + 12/16 - 3/16 = 23-24/16 or 24-1/4

Nope! 24-1/2" as I stated. 23-24/16 does not reduce to 24-1/4.

23-24/16 reduces to 24-8/16



>
> If the face frame is 1/2, then it works out to 24 exactly.
>
> John
>

I could be wrong here but I don't think any "normal" cabinet face frames
are 1/2" thick.

Ff

FrozenNorth

in reply to "Contrarian" on 29/05/2015 3:07 AM

28/05/2015 11:40 PM

On 5/28/2015 11:07 PM, Contrarian wrote:
> the hardware store cut the plywood into pieces about 1/8 too short.
>
> I can still use them but not quite as planned.
>
>
Google a "board stretcher" HTH

--
Froz...

C

"Contrarian"

in reply to "Contrarian" on 29/05/2015 3:07 AM

29/05/2015 5:08 AM

John Grossbohlin <[email protected]> wrote:
> "Contrarian" wrote in message news:[email protected]...
>
>>the hardware store cut the plywood into pieces about 1/8 too short.
>
>>I can still use them but not quite as planned.
>
> Sounds like they cut to the wrong side of the marks so you lost the width of
> the kerf... or the end of their tape measure was buggered up!
>


one of the two. :-(

GG

Greg Guarino

in reply to "Contrarian" on 29/05/2015 3:07 AM

29/05/2015 10:12 AM

On 5/29/2015 1:08 AM, Contrarian wrote:
> John Grossbohlin <[email protected]> wrote:
>> "Contrarian" wrote in message news:[email protected]...
>>
>>> the hardware store cut the plywood into pieces about 1/8 too short.
>>
>>> I can still use them but not quite as planned.
>>
>> Sounds like they cut to the wrong side of the marks so you lost the width of
>> the kerf... or the end of their tape measure was buggered up!
>>
>
>
> one of the two. :-(
>
Some years ago, I seem to remember being told up-front at a lumber yard
that, while they'd do a pretty good job of cutting, it wouldn't be with
the precision of a cabinet shop.

BB

Bill

in reply to "Contrarian" on 29/05/2015 3:07 AM

29/05/2015 10:30 AM

Contrarian wrote:
> John Grossbohlin <[email protected]> wrote:
>> "Contrarian" wrote in message news:[email protected]...
>>
>>> the hardware store cut the plywood into pieces about 1/8 too short.
>>> I can still use them but not quite as planned.
>> Sounds like they cut to the wrong side of the marks so you lost the width of
>> the kerf... or the end of their tape measure was buggered up!
>>
If there was no line, they probably used a different measuring tool. No
two of mine seem to read the same.


>

Mm

-MIKE-

in reply to "Contrarian" on 29/05/2015 3:07 AM

29/05/2015 9:42 AM

On 5/28/15 10:07 PM, Contrarian wrote:
> the hardware store cut the plywood into pieces about 1/8 too short.
>
> I can still use them but not quite as planned.
>

My guess-- he marked the measurement, then cut on the "keep" side of the
mark instead of the waste side. I usually put an X on the side of the
measurement I want the blade to cut to avoid such brain-farts.

I see hardware store saws as rough cutters for convenience. I would
never use them for final cuts because I would never trust their
accuracy, straightness, or for a clean cut.


--

-MIKE-

"Playing is not something I do at night, it's my function in life"
--Elvin Jones (1927-2004)
--
http://mikedrums.com
[email protected]
---remove "DOT" ^^^^ to reply

MM

"Mike Marlow"

in reply to "Contrarian" on 29/05/2015 3:07 AM

29/05/2015 1:48 PM

-MIKE- wrote:

>
> My guess-- he marked the measurement, then cut on the "keep" side of
> the mark instead of the waste side. I usually put an X on the side
> of the measurement I want the blade to cut to avoid such brain-farts.
>
> I see hardware store saws as rough cutters for convenience. I would
> never use them for final cuts because I would never trust their
> accuracy, straightness, or for a clean cut.

When I worked at the Depot, the guys in lumber told customers they could
only be accurate to 1/8". I never understood that. If you can make a mark
at one tick on a tape measure, why can't you make a mark at another tick -
the right one? It's not because the saws were innacurate - they were not.
I used to get called over to make cuts from time to time when lumber needed
help, and I never found the saws to be anything less than accurate. I used
to marvel at the way guys would talk between themselves after a customer
left who had insisted on precise cuts. Just never did get that.

--

-Mike-
[email protected]

Mm

-MIKE-

in reply to "Contrarian" on 29/05/2015 3:07 AM

29/05/2015 4:24 PM

On 5/29/15 12:48 PM, Mike Marlow wrote:
> -MIKE- wrote:
>
>>
>> My guess-- he marked the measurement, then cut on the "keep" side
>> of the mark instead of the waste side. I usually put an X on the
>> side of the measurement I want the blade to cut to avoid such
>> brain-farts.
>>
>> I see hardware store saws as rough cutters for convenience. I
>> would never use them for final cuts because I would never trust
>> their accuracy, straightness, or for a clean cut.
>
> When I worked at the Depot, the guys in lumber told customers they
> could only be accurate to 1/8". I never understood that. If you
> can make a mark at one tick on a tape measure, why can't you make a
> mark at another tick - the right one? It's not because the saws
> were innacurate - they were not. I used to get called over to make
> cuts from time to time when lumber needed help, and I never found the
> saws to be anything less than accurate. I used to marvel at the way
> guys would talk between themselves after a customer left who had
> insisted on precise cuts. Just never did get that.
>

Probably a store policy to keep people from bringing stuff back because
the store's tape didn't match theirs. Heck, I can take three different
tapes that I own and they're be an eighth difference between them all.

In any case, I cringe every time I hear the saws at my local HD. They
sound so dull, it makes your teeth hurt. :-) I'm guessing they've
gone through their fair share of metal and never got replaced.


--

-MIKE-

"Playing is not something I do at night, it's my function in life"
--Elvin Jones (1927-2004)
--
http://mikedrums.com
[email protected]
---remove "DOT" ^^^^ to reply

Mm

-MIKE-

in reply to "Contrarian" on 29/05/2015 3:07 AM

31/05/2015 8:24 PM


On 5/31/15 8:16 PM, Martin Eastburn wrote:
> They don't make 4x8' anymore. It is all metric and is close to that
> size. Check the thickness of a 1/2" or 3/4" board...
>
> Martin
>

Nope, just checked.
It's dead on 48"x96", unless it's that crappy Chinese stuff I got that's
not even square.


--

-MIKE-

"Playing is not something I do at night, it's my function in life"
--Elvin Jones (1927-2004)
--
http://mikedrums.com
[email protected]
---remove "DOT" ^^^^ to reply

dn

dpb

in reply to "Contrarian" on 29/05/2015 3:07 AM

04/06/2015 7:47 AM

On 05/31/2015 8:16 PM, Martin Eastburn wrote:
> They don't make 4x8' anymore. It is all metric and is close to that
> size. Check the thickness of a 1/2" or 3/4" board...
...

Last I checked on their web sites, the nominal manufacturers' exterior
dimensions were still listed in inches...well, let's check again...

Ayup...

<http://www.buildgp.com/plytanium-plywood-sheathing>

--

dn

dpb

in reply to "Contrarian" on 29/05/2015 3:07 AM

05/06/2015 11:38 PM

On 06/05/2015 8:22 PM, Martin Eastburn wrote:
> Check the thickness. See if it is a real 3/4" or 1/2".

Check the manufactuer's website spec's given earlier...they're in
English units, 48x96 at thicknesses 1/32" under the nominal historical
dimensions.

Nobody's claiming you can take a length and remove a kerf thickness and
have the initial total length and my only comment was that US
manufacturers are still using English nominal measurements for at least
construction ply; some furniture/cabinet-grade products are otherwise.

--

dn

dpb

in reply to "Contrarian" on 29/05/2015 3:07 AM

06/06/2015 11:09 PM

On 06/06/2015 9:20 PM, Martin Eastburn wrote:
> So the 1/2" sheet measures out at a 12mm sheet that has large
> dimensions. They don't take 1/32 away from you for nothing.
> 1/32 of a sheet of 1/2" is a loss of a layer. Loss of material
> and the dato blades have to be tuned less than the 1/2" of years ago.
...

Well, doh!

--

Ll

Leon

in reply to "Contrarian" on 29/05/2015 3:07 AM

31/05/2015 12:08 PM

On 5/30/2015 12:46 AM, DerbyDad03 wrote:
> On Friday, May 29, 2015 at 10:17:17 PM UTC-4, Ed Pawlowski wrote:
>> On 5/28/2015 11:07 PM, Contrarian wrote:
>>> the hardware store cut the plywood into pieces about 1/8 too short.
>>>
>>> I can still use them but not quite as planned.
>>>
>>>
>> Some stores will only cut oversize for that reason. You have to trim
>> them, but if an error, it will be on you.
>
> I thought they cut oversize to sell you more wood.
>
> "Can you please cut this sheet of plywood in half?
>
> "I'm sorry, we have to cut it at 48 1/2". You'll have to go get a second sheet if you want two 48" pieces."
>
> ;-)
>

You realize that NO ONE can cut a sheet of plywood in half and end up
with two 48" wide pieces, right? ;~)

Ll

Leon

in reply to "Contrarian" on 29/05/2015 3:07 AM

31/05/2015 12:05 PM

On 5/28/2015 10:07 PM, Contrarian wrote:
> the hardware store cut the plywood into pieces about 1/8 too short.
>
> I can still use them but not quite as planned.
>
>


You should now consider that a lesson learned. Let me guess, you did
not consider the kerf.

ME

Martin Eastburn

in reply to "Contrarian" on 29/05/2015 3:07 AM

28/05/2015 10:33 PM

The steel supplier delivers steel oversize all of the time. I just
learned to have more scrap. Getting less is a problem.
Martin

On 5/28/2015 10:07 PM, Contrarian wrote:
> the hardware store cut the plywood into pieces about 1/8 too short.
>
> I can still use them but not quite as planned.
>
>

Sk

Swingman

in reply to "Contrarian" on 29/05/2015 3:07 AM

03/06/2015 10:18 AM

On 6/3/2015 9:07 AM, John Grossbohlin wrote:

> I guess we need to invent a "zero kerf/zero swarf" cutting method to
> solve this problem... maybe a hydraulic "paper cutter" or "pizza cutter"
> device would work? ;~)

When building base cabinets that are traditionally 24" deep, I minimize
waste (IOW, getting two, correctly grain oriented, end panels for the
cabinet sides out of one 48" width sheet) by cutting the end panels 23
15/16" wide, then cut the dadoes in the FF's to receive the end panels
3/16" deep, instead of 1/4".

That way I end up with an assembled base cabinet that is precisely 24" deep.

Sounds a bit anal, but we often build for spaces that don't yet exist,
so religiously maintaining that type of precision throughout a project
keeps cumulative errors from causing problems during installation.

--
eWoodShop: www.eWoodShop.com
Wood Shop: www.e-WoodShop.net
https://www.google.com/+eWoodShop
https://plus.google.com/+KarlCaillouet/posts
http://www.custommade.com/by/ewoodshop/
KarlCaillouet@ (the obvious)

JG

"John Grossbohlin"

in reply to "Contrarian" on 29/05/2015 3:07 AM

29/05/2015 12:15 AM

"Contrarian" wrote in message news:[email protected]...

>the hardware store cut the plywood into pieces about 1/8 too short.

>I can still use them but not quite as planned.

Sounds like they cut to the wrong side of the marks so you lost the width of
the kerf... or the end of their tape measure was buggered up!

JG

"John Grossbohlin"

in reply to "Contrarian" on 29/05/2015 3:07 AM

03/06/2015 10:07 AM

"Leon" wrote in message
news:[email protected]...

>On 6/1/2015 11:37 AM, Just Wondering wrote:
>> On 6/1/2015 8:26 AM, Swingman wrote:
>>> On 5/31/2015 2:27 PM, [email protected] wrote:
>>>> On Sun, 31 May 2015 12:08:01 -0500, Leon <lcb11211@swbelldotnet>
>>>> wrote:
>>>
>>>>> You realize that NO ONE can cut a sheet of plywood in half and end up
>>>>> with two 48" wide pieces, right? ;~)
>>>> Unless you start with a "standard oversized" sheet at 5X10 ft (3150 X
>>>> 1530mm)
>>>
>>> Nope, not if you cut it "in half", as clearly stated.
>>>
>> If you start with plywood that is exactly 96" wide and cut it exactly in
>> half, assuming the saw blade is a typical 1/8" thick, the pieces won't
>> be 48", they'll be 47 15/16".

>;~) Hey, YOU "get it" too.

I guess we need to invent a "zero kerf/zero swarf" cutting method to solve
this problem... maybe a hydraulic "paper cutter" or "pizza cutter" device
would work? ;~)



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