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By Alan Ambrose · Posted
Don’t know how true it is, but I was told recently that power float skills are less and less common. Some people will try it on though if they have too much business / don’t fancy the job / think you’re a bit gullible. -
By Gus Potter · Posted
It's good to get an update and some feedback, thanks for that. Structural depth difference 650 - 457 = 193mm. Pity it's not working here, can see you have a height restriction. A few questions, observations: 1/ Your beam will need an end rest at each end. I'm just checking, is your 8.4m the clear opening width? You'll want to insulate the reveals thus the structural opening will "grow" a bit. Can you get a beam delivered to your site at the length you need without splicing the beam, in other words is there an access / delivery to site issue. Check with your SE that the UB can be continuous. Any splices (depending on how the are designed) can potentially intrude downwards and that can thwart your glazing detail. Flush splices are expensive to fabricate. 2/ I don't know how much load there is on the beam but if single storey is there a way to reduce the roof load by say transferring part of it to an internal wall? 3/ For steel the devil is in the detail. How close to the sea are you? If less than 2.0 km LABC and NHBC can raise questions, your beam might need to be galvanised and the fixings more durable. Keep an eye out for that. The beauty of ICF is that you can change the grade of concrete and mostly the cover to the rebar if near the sea. If you are near the sea can you check your ICF designer SE has taken this into account? Sometimes folk miss this in the heat of battle, so just check your wall thickness and rebar cover. Post a couple of sketches if you wish and lots of folk on BH will help you with the detailing. What you are doing is not run of the mill, every day is a scoool day even if you have been doing it for decades, cut yourself some slack! -
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If at night you can turn down the MVHR aren't you actually running too high in general. There should be zero reason to change base rate at different times of the day. Get a simple co2 monitor and move about at different times of the day. And actually look at what is occurring and tune the flow based on actual needs. I am using Ubbink duct, no noise. You have either under installed ducts based on your flow rates or you are flowing to high a rate.
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@MortarThePoint (love the name!) I’m afraid it’s not yet commissioned, so can’t comment on how it’s working yet. Just realised my post was from way back in May - so now feeling that’s very slow going on our part. Hopefully another 2-3 months we’ll have it up and running and a toilet or two to flush.
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