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Measuring tape

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buck

11-04-2002 21:09:26




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Looking at an ad from local hardware store and for a 25' stanley powerlock the ad said that it has stud markings at 16 and 19.2" so I check a stanley,lufkin and craftsman that I have and sure enough there is a small black diamond at the 19.2" intervals. I do quite a bit of carpentry work but for the life of me I can not think of a repetative need for this marking. Feel free to tell me how stupid I am but I would like to know what this marking is for.

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Bob from IL

11-05-2002 21:17:37




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 Re: Measuring tape in reply to buck, 11-04-2002 21:09:26  
We were using this measurement in the late sixtys for setting roof trusses before tapes were even marked for 19.2".We used 19 3/16" which is very close. It is a cost savings over 16" but more suport over 24". Insulation is no problem if it is blown in. 4x8 sheets can still be staggered, they don't have to be on 4'.



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Pete@easttn

11-05-2002 17:28:45




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 Re: Measuring tape in reply to buck, 11-04-2002 21:09:26  
When the truss-joist was first introduced here in northeast tennessee I was building house's at this time late 1970's. The 19.2 was later added to tape measure. This was a real aggravating measurment to make before the 19.2 markings. We built mostly basement homes and everybody wanted the new joist because no post had to be used in basement.



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Paul (QC)

11-05-2002 03:18:56




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 Re: Measuring tape in reply to buck, 11-04-2002 21:09:26  

The 19.2" value comes from dividing 96" (8') by 5.

The house we recently had built has its floor
joists spaced at 19.2" so a sheet of plywood
sub flooring will straddle six joists just right.

This has become a pretty common measurement.

Paul



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buck

11-05-2002 09:02:39




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 Re: Re: Measuring tape in reply to Paul (QC), 11-05-2002 03:18:56  

Thanks Paul that sounds logical. Now if I may question How does the stager on the subfloor work out in that 1/2 a sheet does not work out. Do you just place all the end joints on the same joist. Are we mainly talking structural truss-joist and is insulation commonly available for these demensions. Where are you located as this is not a standard practice here in VA.Again thanks and thanks everyone for the relies-I feel a little less stupid today.

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Paul (QC)

11-05-2002 11:42:44




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 Re: Re: Re: Measuring tape in reply to buck, 11-05-2002 09:02:39  

I'm near Montreal. I believe the spacing was
introduced as a cost-cutting measure (though
still better than 24" !). Our house has open
truss joists and 3/4" plywood subfloor. The
ends are joined over a joist, but the sheets
are staggered (I thought it was half a sheet
but I now see your point about that. I'll
have to check but I guess they must be staggered 2/5-3/5. I was under the impression that most
of it was pretty standard stuff. (except the
2x8 walls :-)

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buck

11-05-2002 13:42:22




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 Re: Re: Re: Re: Measuring tape in reply to Paul (QC), 11-05-2002 11:42:44  

Starting to see the big picture now. I can see where this would be cost saving when using engineered truss-joist. You may have saved someone else a little in the future. Thanks again



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Beian G. NY

11-05-2002 04:24:30




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 Re: Re: Measuring tape in reply to Paul (QC), 11-05-2002 03:18:56  
I consider it a banner day when I learn something new; Thanks, Paul!



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Murph

11-05-2002 03:08:18




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 Re: Measuring tape in reply to buck, 11-04-2002 21:09:26  
The black diamonds on tape measures are for metric layouts @ 19.2 instead of 16 or 24 inches



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scooterhead

11-05-2002 02:37:56




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 Re: Measuring tape in reply to buck, 11-04-2002 21:09:26  
I`m with you guys , been building all my life , aint got no idea , hope somebody does . Gota go look at my tapes now !!



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Scott Green

11-05-2002 02:26:45




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 Re: Measuring tape in reply to buck, 11-04-2002 21:09:26  
I've used a ruler all my life. I don't know what it is for. Even if it were metric , what good would it be. Dementional lumber goes by 16" and 4 x 8.



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