Adrian Walker

Flitch beams are generally only supportive in one direction. Bifolds will have a torsion load.

I understand that it was in jest, based on the comments 🙂 However, you should never engage any professional based solely on price.

I think that's a bit harsh, especially as we have several professionals on Build Hub.

It’s similar to a machine surface symbol.

I presume that you have photographic proof of the construction by the builder?

An architect should be struck off for saying that.

Agree with your comments. This cable, as the name suggests, is for an EV charger of less than 20 metres, for voltage drop reasons. It was designed so that an EV charger only needs one entry point for data and power.

The Doncaster EV-Ultra cable contains four twisted pairs, more than enough for clamps and data

It’s CO2 that you need to measure and monitor

Or use Doncaster EV Ultra that has CAT5e inside https://www.yesss.co.uk/ev-ultra-cat5e-cable-4mm2-3-core-data-pvc-steel-wire-armour-black-0 They do a 6mm2 and a 10mm2 version.

Did you find anywhere?

He is looking to measure pressure not air pressure.

If you need any advice on VAT reclaim speak to Andrew at VAT431.co.uk

Have you thought about using self levelling concrete, CEMEX have Evolutuon.

Yes, use normal glass then get it toughen.

A visit to the National Self Build and Renovation Centre (NSRBC) in Swindon is a good place to start.

Yes, helical piles are a solution. They are often used to underpin, but you do need SE advice.

Yes, I used CEMEX Evolution self leaving concrete on a project, worked very well.

I prefer something home grown raspberry pi, pi pico etc

Copper Sulphate will damage zinc, so definitely a no no from me. There are Lichen Removal Agrents available as it’s a known problem.

You are spot on. All bolts need a torque setting plus additional notes on washers, thread locks, etc to ovoid over engineering and costs.

Jeremy, who used to be on this group, had a simplified version. https://forum.buildhub.org.uk/applications/core/interface/file/attachment.php?id=76599&key=beb16589ffeb7656a272e8a689af6cac

Have you modelled your design in PHPP or similar?

You will get a small voltage drop, but nothing to be worried about. Max load for both is/might be more of an issue.

I have just pointed "notebooklm" to BH and it works OK, but it gives more of a summary, but with links to the sources.