Hello,

I was just wondering what does CLS stand for and C16? I think these
are the timbers used for stud walls?

I bought some C16 for a stud wall I was repairing. I've read the wiki
faq and it says not to use 1.5" x 2.5" wood but isn't that the size of
C16?

I had no choice because I was repairing a wall that was already in
place and that was the size of the timber used previously.

I see that the wiki recommends 3" x 2" to be used. I presume you
insert it 3" deep and use the 2" face to attach the plasterboard to?

Thanks,
Stephen.

Stephen wrote:
Hello,

I was just wondering what does CLS stand for and C16? I think these
are the timbers used for stud walls?

CLS stands for Canadian Lumber Standard. Its to do with the structural
strengh of the timber I think. C24 being stronger than C16 for example.

Someone more knowledgeable will be along shortly...


--
Dave - The Medway Handyman
www.medwayhandyman.co.uk

Pretty much as MH says, c16 is the common basic grade for structural
timber, c24 is a higher grade to be used where structural calculations
show it's necessary.

For your (presumably non-structural) stud wall, it doesn't matter
which you use.

Stephen wrote:

I was just wondering what does CLS stand for and C16? I think these
are the timbers used for stud walls?

C16 (and C24) are stress graded kiln dried sawn timbers typically. C16
being the basic level of stress grading commonly found. You can use the
specification in structural design packages like superbeam to design
structures that will meet the requirements of the building regulations
for strength, and deflection etc. A C16 marking means that the timber
will achieve a certain level of strength (give or take a statistical
allowance for natural variation).

CLS (canadian lumber standard) aka "regularised" timber is a lightly
planed construction timber. Its a little smaller in size typically, but
has a smother finish and no sharp corners. This makes it safer to work
with in theory. I don't know if it is also stress graded.

I bought some C16 for a stud wall I was repairing. I've read the wiki
faq and it says not to use 1.5" x 2.5" wood but isn't that the size of
C16?

No, C16 is available in any of the standard sawn sizes. Stud walls would
typically use 4x2" or 3x3" (100x50mm or 75x50mm). These can be real sawn
dimensions or the slightly undersized CLS versions.

I had no choice because I was repairing a wall that was already in
place and that was the size of the timber used previously.

I see that the wiki recommends 3" x 2" to be used. I presume you
insert it 3" deep and use the 2" face to attach the plasterboard to?

Yup. I would say that 4x2 is actually a more common size with older
properties. It also matches the most common door lining size when used
with 1/2" plasterboard each side.



--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

John Rumm wrote:
Stephen wrote:

I was just wondering what does CLS stand for and C16? I think these
are the timbers used for stud walls?

C16 (and C24) are stress graded kiln dried sawn timbers typically. C16
being the basic level of stress grading commonly found. You can use
the specification in structural design packages like superbeam to
design structures that will meet the requirements of the building
regulations for strength, and deflection etc. A C16 marking means
that the timber will achieve a certain level of strength (give or
take a statistical allowance for natural variation).

CLS (canadian lumber standard) aka "regularised" timber is a lightly
planed construction timber. Its a little smaller in size typically,
but has a smother finish and no sharp corners. This makes it safer to
work with in theory. I don't know if it is also stress graded.

I bought some C16 for a stud wall I was repairing. I've read the wiki
faq and it says not to use 1.5" x 2.5" wood but isn't that the size
of C16?

No, C16 is available in any of the standard sawn sizes. Stud walls
would typically use 4x2" or 3x3" (100x50mm or 75x50mm). These can be
real sawn dimensions or the slightly undersized CLS versions.

I'd disagree John. Wickes for example only stock 38 x 63 or 38 x 89, as do
B&Q. Albeit these are finished sizes, C16 certainly isn't readily avaialble
in all standard sawn sizes.


--
Dave - The Medway Handyman
www.medwayhandyman.co.uk

The Medway Handyman wrote:
John Rumm wrote:
Stephen wrote:

I was just wondering what does CLS stand for and C16? I think these
are the timbers used for stud walls?
C16 (and C24) are stress graded kiln dried sawn timbers typically. C16
being the basic level of stress grading commonly found. You can use
the specification in structural design packages like superbeam to
design structures that will meet the requirements of the building
regulations for strength, and deflection etc. A C16 marking means
that the timber will achieve a certain level of strength (give or
take a statistical allowance for natural variation).

CLS (canadian lumber standard) aka "regularised" timber is a lightly
planed construction timber. Its a little smaller in size typically,
but has a smother finish and no sharp corners. This makes it safer to
work with in theory. I don't know if it is also stress graded.

I bought some C16 for a stud wall I was repairing. I've read the wiki
faq and it says not to use 1.5" x 2.5" wood but isn't that the size
of C16?
No, C16 is available in any of the standard sawn sizes. Stud walls
would typically use 4x2" or 3x3" (100x50mm or 75x50mm). These can be
real sawn dimensions or the slightly undersized CLS versions.

I'd disagree John. Wickes for example only stock 38 x 63 or 38 x 89, as do
B&Q. Albeit these are finished sizes, C16 certainly isn't readily avaialble
in all standard sawn sizes.

Well I suppose it depends on your definition of standard sawn sizes. I
have never had any trouble buying C16 in 3x2, 4x2, 6x2, 7x2, 8x2, and
8x3 - i.e. common joist sizes. Buying C24 is harder - I needed some of
that when I did my loft and had to order some which took a week.

(I would not consider what Wickes carry to be much of an indication of
availability though - they tends to have quite a small range in many
things (although quite often reasonably well priced basic building
materials for what they do have. )

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

John Rumm wrote:
The Medway Handyman wrote:
John Rumm wrote:
Stephen wrote:

I was just wondering what does CLS stand for and C16? I think these
are the timbers used for stud walls?
C16 (and C24) are stress graded kiln dried sawn timbers typically.
C16 being the basic level of stress grading commonly found. You can
use the specification in structural design packages like superbeam
to design structures that will meet the requirements of the building
regulations for strength, and deflection etc. A C16 marking means
that the timber will achieve a certain level of strength (give or
take a statistical allowance for natural variation).

CLS (canadian lumber standard) aka "regularised" timber is a lightly
planed construction timber. Its a little smaller in size typically,
but has a smother finish and no sharp corners. This makes it safer
to work with in theory. I don't know if it is also stress graded.

I bought some C16 for a stud wall I was repairing. I've read the
wiki faq and it says not to use 1.5" x 2.5" wood but isn't that
the size of C16?
No, C16 is available in any of the standard sawn sizes. Stud walls
would typically use 4x2" or 3x3" (100x50mm or 75x50mm). These can be
real sawn dimensions or the slightly undersized CLS versions.

I'd disagree John. Wickes for example only stock 38 x 63 or 38 x
89, as do B&Q. Albeit these are finished sizes, C16 certainly isn't
readily avaialble in all standard sawn sizes.

Well I suppose it depends on your definition of standard sawn sizes. I
have never had any trouble buying C16 in 3x2, 4x2, 6x2, 7x2, 8x2, and
8x3 - i.e. common joist sizes. Buying C24 is harder - I needed some of
that when I did my loft and had to order some which took a week.

Never seen it it any other sizes, but then again I've never needed to look.

(I would not consider what Wickes carry to be much of an indication of
availability though - they tend to have quite a small range in many
things (although quite often reasonably well priced basic building
materials for what they do have. )

Agreed, they stock basic stuff, but I don't tend to need to visit
builders/timber merchants much. I guess 'readily available' and 'available'
are different things.

To me, given what I do, Wickes are 'heavyside' :-)


--
Dave - The Medway Handyman
www.medwayhandyman.co.uk

On Sun, 08 Feb 2009 23:45:35 +0000, John Rumm wrote:

I'd disagree John. Wickes for example only stock 38 x 63 or 38 x 89, as do
B&Q. Albeit these are finished sizes, C16 certainly isn't readily avaialble
in all standard sawn sizes.

Well I suppose it depends on your definition of standard sawn sizes. I
have never had any trouble buying C16 in 3x2, 4x2, 6x2, 7x2, 8x2, and
8x3 - i.e. common joist sizes. Buying C24 is harder - I needed some of
that when I did my loft and had to order some which took a week.

Wickes' timber is generally better (less bad) than B&Q's. I could have
saved over £100 on my last lot (lower prices and wrinklycard) but used
Wickes (and had luck with a reduction halving the difference) after looking
at the timber.

For fitting a larger loft hatch I wanted good timber for the new surround
and that from Wickes is almost free of faults in the relatively short runs
used, so I didn't worry about category.
--
Peter.
You don't understand Newton's Third Law of Motion?
It's not rocket science, you know.

Stephen wrote:
Hello,

I was just wondering what does CLS stand for and C16? I think these
are the timbers used for stud walls?

I bought some C16 for a stud wall I was repairing. I've read the wiki
faq and it says not to use 1.5" x 2.5" wood but isn't that the size of
C16?

I had no choice because I was repairing a wall that was already in
place and that was the size of the timber used previously.

I see that the wiki recommends 3" x 2" to be used. I presume you
insert it 3" deep and use the 2" face to attach the plasterboard to?

Thanks,
Stephen.

C16 merely refers to the grade of timber and has nothing to do with size.

C16 has less knots and imperfections than ungraded timber and is commonly
used in roofs and other weight bearing situations.
C24 has less knots and imperfections than C16

--
Phil L
RSRL Tipster Of The Year 2008