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What foundations to use on our micro house aka lean to shed

 
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The ruin in rock is staying and we plan to rebuild the old broken block building.

We were going cold form steel or LSF but price is beyond our budget.

Now we will use concrete blocks which are about 50 cm long.  
And 6cm high.  Varying depths available.

The roof could either just go over the extension for now.  Later we can reproof both buildings.

Roof will either be in insulated panels or corrugated iron but light.

There's is existing rough concrete on the floor.  We are thinking if topping it with 1inch if self compacting gravel. Then 5cm of concrete at a 1.2.4 ratio.  

Would this constitute a suitable foundation and high do we transfer the liad from the roof down?

Put in 3 masonary columns.  38 cm sad and  filled the hollow with concrete and put metal ties in every 4th row to attach concrete block walks.  Would that work?

Is it over engineering or under engineered.

Husband is used to strip foundations so would they be better.

I am trying to save time, money and his body.

Photos to follow.

We are Northern r Hemisphere.  Mediterranean climate.  Little to low frost.
 
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Are photos possible, its hard to work things out.
"We were going cold form steel or LSF but price is beyond our budget." what is this related too?
"
Put in 3 masonary columns. 38 cm sad and  filled the hollow with concrete and put metal ties in every 4th row to attach concrete block walks."
what do the underlined bits relate too?
 
Jenny Ives
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John C Daley wrote:Are photos possible, its hard to work things out.
"We were going cold form steel or LSF but price is beyond our budget." what is this related too? We wanted to frame the rebuild in LSF and roif in LSF framing too.  
"
Put in 3 masonary columns. 38 cm sad and  filled the hollow with concrete and put metal ties in every 4th row to attach concrete block walks." walls not walls.
what do the underlined bits relate too?

Side-elevation-of-LSF-project.jpg
[Thumbnail for Side-elevation-of-LSF-project.jpg]
 
Jenny Ives
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Drawn in we're we will put masonry columns filled with concrete to be the support for the roof.  We will put a concrete beam across the beams.

We've had dire experience of trying to buy heat treated timber in rural Portugal.  
Poition-of-columns.jpg
[Thumbnail for Poition-of-columns.jpg]
 
Jenny Ives
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This is the existing 'slab'.  This is where we will construct a 5m x 5m extension.

If I add more than 1 photo it won't post and times out.
20220410_080936.jpg
[Thumbnail for 20220410_080936.jpg]
 
John C Daley
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Your terms seem muddled.
Heat treated timber, what is that?


Drawn in we're we will put masonry columns filled with concrete to be the support for the roof.  We will put a concrete beam across the beams.



Do you mean [  we will put masonry columns filled with concrete to be the support for the roof.  We will put a concrete beam across the xxxxbeamsxxxx. COLUMNS ]

How far apart are the rock walls, you have changed the unit of measure, on the drawing so often much its unreadable!

What is this steel to be used for? "We were going cold form steel or LSF but price is beyond our budget."

What will be the infill between the masonary columns?
 
Jenny Ives
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John C Daley wrote:Your terms seem muddled.
Heat treated timber, what is that?


High summer temperature and pests attack wood in our area
“Heat treated” refers to lumber that has been specially treated to kill pests and pathogens that may reside in wood. The process involves heating the wood to a core temperature of 56° C (133° F) for at least 30 minutes.Jul 29, 2019

Drawn in we're we will put masonry columns filled with concrete to be the support for the roof.  We will put a concrete beam across the beams.



Do you mean [  we will put masonry columns filled with concrete to be the support for the roof.  We will put a concrete beam across the xxxxbeamsxxxx. COLUMNS ] Yes

How far apart are the rock walls, you have changed the unit of measure, on the drawing so often much its unreadable!

The rock walls are 5 meters apart.  Each rock wall is 65cm thick. Height of walls 2.4 meters.  No modern 'foundation' to the rock walls. We've have laid a new 15cm thick slab inside rock ruin.  The slab sits on a bed 10 cm thick leca.   LECA is the abbreviation of lightweight expanded clay aggregate.

What is this steel to be used for? "We were going cold form steel or LSF but price is beyond our budget."
To frame the house in light steel frame / cold form steel.  Is that the term used? Instead of timber/lumber or concrete we were going to use LSF. As they do for trailer houses. "The Light Steel Framing system is characterized by a light structure of galvanized steel profiles, which work together to support the building. "

What will be the infill between the masonary columns?


Cement building Blocks. Pic attached.
Screenshot_20220418-104213_Chrome.jpg
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