Building Standards; Getting It Right!
Sep 06, 2021 7:33 am
Hi Braintrust Engineers!
I am building in Marsden Park NSW and first-time poster here; I have read a couple of valuable pieces of feedback on this blog and this blog is really very useful to me.
Site classification is P and Slab design (specified in the Soil report) is H1. Hs -1.8 m and Ys - 60 mm.
1. Soil Ys values from my soil test is 60mm and if you consider long term (30 years), there would be approx. few mm more settlement. So, if you add up both values then I am exceeding H1 Borderline limit (60 mm) and slab design should fall under H2 (61-75 mm) slab criteria. Please correct me if I am wrong.
2. I assume there would be more moisture content in winter so Ys winter would be higher than 60 mm. Am I right here?
The structural engineer has designed the slab as H1, but I am not a structural engineer so not sure how to convince him to go with H2 slab. Do you think the above-mentioned reasons are sufficient or technically valid to persuade structural engineer? If you have other points, please advise.
Builder contract says H1/H2 slab.
Re: Soil surface movement Ys value - 60. H1 or H2 slab as p2
Sep 06, 2021 8:42 am
are you an engineer? if not, you don't have much of a say. Imagine the conversation with the engineer " I was on this internet forum, and somone on there said blah blah blah".
If you want them to over engineer it, you could ask for that. Though expect to pay more and no know if you truly got what you paid for.
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