Sat, 30 May 2026 18:47:05 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15550&Focus=265393#Comment_265393 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15550&Focus=265393#Comment_265393 Fri, 02 Feb 2018 23:54:43 +0000 gyrogear
The blocks are 200mm and the wing is generally 250mm, locally wider.
Footing appears to be around 6 inches thick, and sitting on solid bedrock (mudstone).
I'd also like to trim the wing to 250mm (using a cutting wheel) (as depicted by the rebar).

(see photo).

Per F. CHING, the triangle of forces starts at the bottom corner of the footing, and extends outward at a slope. However I do not intend going below the bottom corner of the footing in any case.

Would then recast the footing with high-strength concrete, inside a form board.

Just thought I'd seek comments before going past the point of no return...

gg]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15550&Focus=265399#Comment_265399 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15550&Focus=265399#Comment_265399 Sat, 03 Feb 2018 09:49:11 +0000 tony
The wing overspill was potentially helping the footing but it will be OK without it, don’t ask and engineer and please don’t sue me for this practical down to earth opinion.

It seems to me that you have dug below the footing and already encroached into the 45degree zone though could you draw a section through existing and proposed please and post them]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15550&Focus=265413#Comment_265413 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15550&Focus=265413#Comment_265413 Sat, 03 Feb 2018 15:26:14 +0000 gyrogear
No, I won't sue you, except for the five quid I paid to get on here !

Enclosed is situation drawings.

I "heavily explored" below the wing overspill: the concrete is 160mm thick and there is 40mm that I scraped out with my hammer, then it is solid rock - my usual heavily consolidated shale... It does not so much "ring" to the hammer, as give a dull boxy thudding noise...

I was trying to avoid underpinning this wall for OBVIOUS reasons !

(I already underpinned the entire north and E &W (gable) walls (= 20m run) when installing edge insulation to my (still-in-progress...) limecrete slab, just don't anybody tell my O/H...



Thanks again,

gg]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15550&Focus=265424#Comment_265424 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15550&Focus=265424#Comment_265424 Sat, 03 Feb 2018 18:55:50 +0000 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15550&Focus=265429#Comment_265429 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15550&Focus=265429#Comment_265429 Sat, 03 Feb 2018 22:00:56 +0000 gyrogear
I did *build* the rough rubble wall 200 thick (that is why the trench is only 1000 wide, as opposed to 1200 before).
The coping/parapet wall is 150 thick and 170 high.

Enclosed is photo of general layout showing RR wall and slab, and crosswall footing.
Free height above slab is only 800 so no heavy machine tools in that bit LOL

Profuse thanks again of your technical opinion.

gg]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15550&Focus=265430#Comment_265430 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15550&Focus=265430#Comment_265430 Sat, 03 Feb 2018 22:07:45 +0000 tony
Are you a hobbit by any chance?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15550&Focus=265431#Comment_265431 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15550&Focus=265431#Comment_265431 Sat, 03 Feb 2018 22:53:30 +0000 gyrogear
(certainly no Troll, me !)

gg]]>