I need a base for some large log stores. One solution is to place them
on 440x220x100 concrete building blocks. This could be achieved fairly
quickly, and allows for straightforward relocation at a later date.

The site is disturbed ground - so this may not provide uniform support
and I can expect some settlement. However I can make adjustments at a
later date as and when the stores are empty.

Concrete blocks seem to come in 2 main types - dense and medium density.
Both types are available for a compression load of 70 N/mm2. The
medium density blocks weigh about 14.5kg as opposed to 18 kg for the
dense blocks but cost approximately 10% more.

I am willing to pay the extra premium on the medium density blocks in
return for the easier handling. But will the medium density blocks be
more fragile and liable to break in my application where the variable
nature of the ground support may give rise to shear stresses across the
blocks?

Any comments appreciated.

Andrew

Why do you need a concrete block floor for a log store?

Jim K

JimK wrote:
Why do you need a concrete block floor for a log store?

Jim K


It is a base for the structure rather than a floor and is to keep the
timber bearers off the ground - in the same way as one might do for a
garden shed. (I will be placing a damp proof membrane between the timber
and the base).

Andrew

On 19/05/2015 22:41, Andrew wrote:
JimK wrote:
Why do you need a concrete block floor for a log store?

Jim K


It is a base for the structure rather than a floor and is to keep the
timber bearers off the ground - in the same way as one might do for a
garden shed. (I will be placing a damp proof membrane between the timber
and the base).

Andrew


If the bearers are going to be spanning many blocks then if one sinks,
the vertical load will just transfer to the next one.

Just how high is this log store going to be? My gut feel is that medium
density would be fine.

On 19/05/15 22:23, JimK wrote:
Why do you need a concrete block floor for a log store?

Jim K

Because you want to launch a cruise missile from it?

Dunno. I give up. What's the answer?


--
Everything you read in newspapers is absolutely true, except for the
rare story of which you happen to have first-hand knowledge. €“ Erwin Knoll

newshound wrote:
On 19/05/2015 22:41, Andrew wrote:
JimK wrote:
Why do you need a concrete block floor for a log store?

Jim K


It is a base for the structure rather than a floor and is to keep the
timber bearers off the ground - in the same way as one might do for a
garden shed. (I will be placing a damp proof membrane between the timber
and the base).

Andrew


If the bearers are going to be spanning many blocks then if one sinks,
the vertical load will just transfer to the next one.

Just how high is this log store going to be? My gut feel is that medium
density would be fine.

The logstores a

http://www.fisherswoodcrafts.co.uk/v...Year-Guarantee

They currently sit on paving, but I want to remove them to another part
of the garden whilst they are empty.

Andrew

"Andrew" wrote in message
o.uk...

I need a base for some large log stores. One solution is to place them on
440x220x100 concrete building blocks. This could be achieved fairly
quickly, and allows for straightforward relocation at a later date.

The site is disturbed ground - so this may not provide uniform support and
I can expect some settlement. However I can make adjustments at a later
date as and when the stores are empty.

Concrete blocks seem to come in 2 main types - dense and medium density.
Both types are available for a compression load of 70 N/mm2. The medium
density blocks weigh about 14.5kg as opposed to 18 kg for the dense blocks
but cost approximately 10% more.

I am willing to pay the extra premium on the medium density blocks in
return for the easier handling. But will the medium density blocks be more
fragile and liable to break in my application where the variable nature of
the ground support may give rise to shear stresses across the blocks?

Any comments appreciated.

Andrew

Another variable is their material.They come as basically concrete, and
basically fly ash. My experience is that the concrete variety last much
longer in damp (ie on the ground) conditions, whereas the fly ash ones
crumble away with frost damage. Both materials come in different bearing
abilities so the 3.5 / 7.0 / 14 Newton loading doesn't necessarily determine
their composition. Concrete one have a smoother finish with less pore and
are heavy.

Andrew

"Andrew" wrote in message
news
newshound wrote:
On 19/05/2015 22:41, Andrew wrote:
JimK wrote:
Why do you need a concrete block floor for a log store?

Jim K


It is a base for the structure rather than a floor and is to keep the
timber bearers off the ground - in the same way as one might do for a
garden shed. (I will be placing a damp proof membrane between the timber
and the base).

Andrew


If the bearers are going to be spanning many blocks then if one sinks,
the vertical load will just transfer to the next one.

Just how high is this log store going to be? My gut feel is that medium
density would be fine.

The logstores a

http://www.fisherswoodcrafts.co.uk/v...Year-Guarantee

Jeezus. Why didn’t you DIY something as simple as that ?

They currently sit on paving, but I want to remove them to another part of
the garden whilst they are empty.

Andrew

Andrew wrote:
The logstores a

http://www.fisherswoodcrafts.co.uk/v...Year-Guarantee

Blimey. £334.00. Just asking for DIY I'd have thought.

--
Mike Barnes
Cheshire, England

/They currently sit on paving, but I want to remove them to another part
of the garden whilst they are empty./q

Concrete lintels?

Jim K

On Wednesday, 20 May 2015 10:44:16 UTC+1, Mike Barnes wrote:
Andrew wrote:
The logstores a

http://www.fisherswoodcrafts.co.uk/v...Year-Guarantee

Blimey. £334.00. Just asking for DIY I'd have thought.

pallet wood


NT

On 20/05/2015 08:02, Andrew wrote:
newshound wrote:
On 19/05/2015 22:41, Andrew wrote:
JimK wrote:
Why do you need a concrete block floor for a log store?

Jim K


It is a base for the structure rather than a floor and is to keep the
timber bearers off the ground - in the same way as one might do for a
garden shed. (I will be placing a damp proof membrane between the timber
and the base).

Andrew


If the bearers are going to be spanning many blocks then if one sinks,
the vertical load will just transfer to the next one.

Just how high is this log store going to be? My gut feel is that medium
density would be fine.

The logstores a

http://www.fisherswoodcrafts.co.uk/v...Year-Guarantee


They currently sit on paving, but I want to remove them to another part
of the garden whilst they are empty.

Andrew

Surely they would be fine on medium density blocks? Wouldn't use
lightweights.