On Wed, 8 Oct 2003 13:55:37 +0200, "JennyC" wrote:


BTW I do know of a decent survey service if you are reasonably close
to
Shropshire.

See my other post Dave.............
Also Shropshire is not close to Rotterdam :~))

sigh if only :-)
--
Martin

"martin"
"JennyC" wrote:

Then I`m of no use whatsoever. I`m a timber engineer. Chances are
tho
that the design requirements are the same. BS codes have that
effect
now. If it`s old then I`d be very carefull.

I was !! I had wild plans for a shallow pond with a waterfall type
affair on my roof garden, but luckily found the architect who build
our house and he told me that the roof could carry 150Kg per square
meter. My water feature would have been double that............. So
now I have heavy pots situated over the weightbearing walls below
and
around the edges...........:~)

and being in NL, the whole lot is slowly sinking into the ground?
Martin

We are about 5 meters below sea level already...........blup blup blup
Jenny

On Wed, 8 Oct 2003 16:06:46 +0200, "JennyC" wrote:


"martin"
"JennyC" wrote:

Then I`m of no use whatsoever. I`m a timber engineer. Chances are
tho
that the design requirements are the same. BS codes have that
effect
now. If it`s old then I`d be very carefull.

I was !! I had wild plans for a shallow pond with a waterfall type
affair on my roof garden, but luckily found the architect who build
our house and he told me that the roof could carry 150Kg per square
meter. My water feature would have been double that............. So
now I have heavy pots situated over the weightbearing walls below
and
around the edges...........:~)

and being in NL, the whole lot is slowly sinking into the ground?
Martin

We are about 5 meters below sea level already...........blup blup blup
Jenny

We were a metre above, but the water is rising as I speak
............blupGodblupverblupdomme.........
--
Martin

The message
from "JennyC" contains these words:

Then I`m of no use whatsoever. I`m a timber engineer. Chances are
tho
that the design requirements are the same. BS codes have that effect
now. If it`s old then I`d be very carefull.

I was !! I had wild plans for a shallow pond with a waterfall type
affair on my roof garden, but luckily found the architect who build
our house and he told me that the roof could carry 150Kg per square
meter. My water feature would have been double that............. So
now I have heavy pots situated over the weightbearing walls below and
around the edges...........:~)

My bathroom was tacked on the end of the house some years ago - long
before I bought it. It has a flat roof with a miniscule fall.

I had a wild idea of putting a platform up there to spread the load, and
then parking a bath with a fig tree in it up there. Where it was planned
to stand was well supported by an internal wall.

On mature consideration some poor osd may have to do some work on the
roof one day, and a bath full of soil and fig tree might cause him to
think unkindly of my planning ability......

So, as I have to remove a rockery to get access for a motorcycle
combination to the sheds, the bath will stand on rubble from a
chimneybreast which is coming out and be surrounded by the resited
rockery.

Unworked-on position http://www.users.zetnet.co.uk/hi-fi/hsefront.jpg

Watch this space!

--
Rusty Hinge
horrid·squeak&zetnet·co·uk
http://www.users.zetnet.co.uk/hi-fi/tqt.htm

On Mon, 6 Oct 2003 09:41:18 +0100, Christopher Norton wrote:

The design requirement for a man load on flat roof joists will mean it
can carry almost as many growbags as you require.

Loading is almost certainly not a factor in this case. If you want me to
check then get the size of the flat roof joist, with the longest
distance between supports and I`ll do a quick calc to prove the loading
for you. 8-)

One important difference, however, between the load that roofs
are designed for and the load imposed by plant pots, grow-bags,
and such: the latter are a permanent load, whereas snowloading
(the only real weight a roof takes) is transient in temperate
climates, coming and going through the winter. (Heavy snowfall
areas have steeper roofs than low snowfall areas, so the load is
simply shed to the ground.) A load that causes no damage in that
time frame may produce significant settling and warping after six
months or a year or so.


--
Rodger Whitlock
Victoria, British Columbia, Canada
change "invalid" to "net" to respond

On Mon, 6 Oct 2003 09:41:18 +0100, Christopher Norton wrote:

The design requirement for a man load on flat roof joists will mean it
can carry almost as many growbags as you require.

Loading is almost certainly not a factor in this case. If you want me to
check then get the size of the flat roof joist, with the longest
distance between supports and I`ll do a quick calc to prove the loading
for you. 8-)

One important difference, however, between the load that roofs
are designed for and the load imposed by plant pots, grow-bags,
and such: the latter are a permanent load, whereas snowloading
(the only real weight a roof takes) is transient in temperate
climates, coming and going through the winter. (Heavy snowfall
areas have steeper roofs than low snowfall areas, so the load is
simply shed to the ground.) A load that causes no damage in that
time frame may produce significant settling and warping after six
months or a year or so.


--
Rodger Whitlock
Victoria, British Columbia, Canada
change "invalid" to "net" to respond

On Mon, 6 Oct 2003 09:41:18 +0100, Christopher Norton wrote:

The design requirement for a man load on flat roof joists will mean it
can carry almost as many growbags as you require.

Loading is almost certainly not a factor in this case. If you want me to
check then get the size of the flat roof joist, with the longest
distance between supports and I`ll do a quick calc to prove the loading
for you. 8-)

One important difference, however, between the load that roofs
are designed for and the load imposed by plant pots, grow-bags,
and such: the latter are a permanent load, whereas snowloading
(the only real weight a roof takes) is transient in temperate
climates, coming and going through the winter. (Heavy snowfall
areas have steeper roofs than low snowfall areas, so the load is
simply shed to the ground.) A load that causes no damage in that
time frame may produce significant settling and warping after six
months or a year or so.


--
Rodger Whitlock
Victoria, British Columbia, Canada
change "invalid" to "net" to respond

The message
from (Rodger Whitlock)
contains these words:

One important difference, however, between the load that roofs
are designed for and the load imposed by plant pots, grow-bags,
and such: the latter are a permanent load, whereas snowloading
(the only real weight a roof takes) is transient in temperate
climates, coming and going through the winter. (Heavy snowfall
areas have steeper roofs than low snowfall areas, so the load is
simply shed to the ground.) A load that causes no damage in that
time frame may produce significant settling and warping after six
months or a year or so.


--
Rodger Whitlock
Victoria, British Columbia, Canada
change "invalid" to "net" to respond

The loading you describe is factored down after 30 degrees pitch. Once
it gets to about 55 to 60 it`s practically negligable. However, at 22.5
degree the load is approximately equivalent to 10ft of snow (it dont
happen in england). God knows why they decided to have the load so great
but thats code of practices for you. It`s classed here as a medium term
load and thats the one that timber is designed to and not long term
loadings. All fixing requirements are taken for the reaction in medium
term and not long term.

Interesting subject and you`d have thought that flat roofs would be easy
to design. In fact, they are some of the hardest ones.

--
email farmer chris on
Please don`t use as it`s a spam haven.

On Thu, 9 Oct 2003 08:22:02 +0100, Christopher Norton
wrote:

snip
However, at 22.5
degree the load is approximately equivalent to 10ft of snow (it dont
happen in england).

I am sure somebody will contradict that :-)
--
Martin

The message
from martin contains these words:
On Thu, 9 Oct 2003 08:22:02 +0100, Christopher Norton
wrote:

snip
However, at 22.5
degree the load is approximately equivalent to 10ft of snow (it dont
happen in england).

I am sure somebody will contradict that :-)

Oh, go on then.

--
Rusty Hinge
horrid·squeak&zetnet·co·uk
http://www.users.zetnet.co.uk/hi-fi/tqt.htm

On Thu, 9 Oct 2003 15:36:08 +0100, Jaques d'Altrades
wrote:

The message
from martin contains these words:
On Thu, 9 Oct 2003 08:22:02 +0100, Christopher Norton
wrote:

snip
However, at 22.5
degree the load is approximately equivalent to 10ft of snow (it dont
happen in england).

I am sure somebody will contradict that :-)

Oh, go on then.

10ft. of snow does occur in UK.

your turn...
--
Martin

On Thu, 09 Oct 2003 17:26:04 +0200, martin wrote:

On Thu, 9 Oct 2003 15:36:08 +0100, Jaques d'Altrades
wrote:

The message
from martin contains these words:
On Thu, 9 Oct 2003 08:22:02 +0100, Christopher Norton
wrote:

snip
However, at 22.5
degree the load is approximately equivalent to 10ft of snow (it dont
happen in england).

I am sure somebody will contradict that :-)

Oh, go on then.

10ft. of snow does occur in UK.

your turn...
--
Martin

Is this "drifting" off topic?

Geoff

On Thu, 09 Oct 2003 19:19:19 GMT,
wrote:

On Thu, 09 Oct 2003 17:26:04 +0200, martin wrote:

On Thu, 9 Oct 2003 15:36:08 +0100, Jaques d'Altrades
wrote:

The message
from martin contains these words:
On Thu, 9 Oct 2003 08:22:02 +0100, Christopher Norton
wrote:

snip
However, at 22.5
degree the load is approximately equivalent to 10ft of snow (it dont
happen in england).

I am sure somebody will contradict that :-)

Oh, go on then.

10ft. of snow does occur in UK.

your turn...
--
Martin

Is this "drifting" off topic?

I bet you expected an avalanche of answers.
--
Martin

On Thu, 09 Oct 2003 21:49:49 +0200, martin wrote:

On Thu, 09 Oct 2003 19:19:19 GMT,
wrote:

On Thu, 09 Oct 2003 17:26:04 +0200, martin wrote:

On Thu, 9 Oct 2003 15:36:08 +0100, Jaques d'Altrades
wrote:

The message
from martin contains these words:
On Thu, 9 Oct 2003 08:22:02 +0100, Christopher Norton
wrote:

snip
However, at 22.5
degree the load is approximately equivalent to 10ft of snow (it dont
happen in england).

I am sure somebody will contradict that :-)

Oh, go on then.

10ft. of snow does occur in UK.

your turn...
--
Martin

Is this "drifting" off topic?

I bet you expected an avalanche of answers.
--
Martin

It's no matter to me .......

Geoff

On Thu, 09 Oct 2003 20:02:34 GMT,
wrote:

On Thu, 09 Oct 2003 21:49:49 +0200, martin wrote:

On Thu, 09 Oct 2003 19:19:19 GMT,
wrote:

On Thu, 09 Oct 2003 17:26:04 +0200, martin wrote:

On Thu, 9 Oct 2003 15:36:08 +0100, Jaques d'Altrades
wrote:

The message
from martin contains these words:
On Thu, 9 Oct 2003 08:22:02 +0100, Christopher Norton
wrote:

snip
However, at 22.5
degree the load is approximately equivalent to 10ft of snow (it dont
happen in england).

I am sure somebody will contradict that :-)

Oh, go on then.

10ft. of snow does occur in UK.

your turn...
--
Martin

Is this "drifting" off topic?

I bet you expected an avalanche of answers.
--
Martin

It's no matter to me .......

.......... if you are dreaming of a white Christmas

--
Martin