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Thread: Veranda Post support advice
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12th June 2024, 05:09 PM #1
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Veranda Post support advice
Hi all.
we live in an older owner/builder mud-brick home that has a verandah made with railway sleeper posts. unfortunately the builder dropped the posts directly in the ground and as a result, they have rotted considerably.
post.jpg
my plan now is to prop up each section, remove the post, cut the bottom off and replace onto a stirrup set in concrete.
each post is around 230x130mm so finding appropriately sized stirrups has been difficult. the styandard pryda type full stirrup is only about 75mm wide and 3mm thick so wasn't sure if it would be adequate.
i was thinking of using a pair of 'tornado' style stirrups on each post as they are significant thicker than the others (5-6mm) and can take 125mm posts.
2024-06-12 12_04_59-Hardwood Posts - Garde Timber — Mozilla Firefox.jpg
another option was a t-blade style but i would have to try to cut a 'slot' longways into the base of each post which i thought would be difficult.
a few questions i would appreciate some advice on:
1. does the above method sound ok? posts are in good condition other than where they are in the ground.
2. what size/how deep should the concrete footings be?
3. the bottom part of the stirrup is around 400mm which means by the time i allow for paving and elevating the post a little, they will sit in around 200mm into the concrete footing. is this enough or should i search for a stirrup with a longer base? or add some sort of reo tie?
any advice would be appreciated. cheers
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12th June 2024, 10:06 PM #2
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1. Yes, it's common practice
2. really depends on the size of the structure, but imagining a nominal verandah, 600 deep and 30 diameter would likely be ok.
3. 200 into the concrete would be minimum.
More details about the verandah dimensions and roof material might help
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13th June 2024, 10:00 AM #3
Modify the standard stirrups that are available, (modify: cut and re-weld as appropriate) or make your own design. Then get them hot dip galvanized.
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13th June 2024, 06:03 PM #4
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thanks. tin roof around 2m wide. posts are spaced every 3m or so.
20240613_091737.jpg
could prob get them in around 250mm if i dont raise the posts quite so much. would it help to bend up some reo to put though them to add some depth?
cheers
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13th June 2024, 06:04 PM #5
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13th June 2024, 06:10 PM #6
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Yeah, bend some reo over for good measure. And all things being equal, given it's been there "forever" with no issues, it's probably safe to just dig to the bottom of the rotten posts and "bell" bottom of the sides of the holes a bit too for good measure. But if it's easy digging, better to go to 600
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14th June 2024, 02:07 PM #7
Are you sure they're in soil and not concrete?
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14th June 2024, 04:20 PM #8
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14th June 2024, 05:43 PM #9
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