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Nelliekins last won the day on May 5

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About Nelliekins

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  1. Nelliekins

    ICF's soaking up the plasticizer

    Totally agree. I chose to chase out the EPS with a DIY hot knife and use 6242B cable, derating sufficiently according to 17th edition (which was in effect when my cabling install was designed). I have since been told by the sparky who fitted our solar panels that he'd have put electrical conduit in, so that seems like the "Pro" solution. 👍
  2. Nelliekins

    ICF's soaking up the plasticizer

    @scottishjohn if you look carefully you will see there is 50x50 trunking already installed all around the cabinet. Where it's needed I have installed it. As for running cable in conduit, you still have to put the conduit somewhere. If that "somewhere" is in the EPS then it will still derate the cable, albeit not quite as badly. From recollection (I don't have the 7671 guide at home, cos it's living at site at the mo) clipped direct gives 27A limit, in conduit in EPS would give 18.5A or thereabouts (although some argue that the derating isn't valid if you're talking about conduit that is also touching the plasterboard, the regs don't give a firm steer either way so I play safe). Besides which, the lifetime of the mains cable for sockets (which is all that I am chasing into the EPS anyway) is probably longer than my remaining years on this planet, and sockets don't tend to need additional cables pulled 😁
  3. Nelliekins

    Three pours down..none to go - thank goodness

    Lol, we had an excess delivered, and I said to the concrete truck driver "just hold off on tipping all of it into the pump while I check with the crew if its needed"... ... But the driver decided to dump it all in the pump hopper as quick as he could, and chuffed off back to the batching plant. Here's a recent pic of the front of our house... The observant among you will notice something that looks remarkably like a scene from "The Lion King" to the left of the picture. We call it "the Monolith". The 13T digger we had on site couldn't move it, so we have decided to make it a feature! 1/3T pump line, pah! Try 3m3 of C68 concrete being dumped where you wanted a lawn! 😭
  4. Nelliekins

    For my Dad

    Apologies for the lack of updates on the blog. Things have been quite taxing over the past couple of months, coming to terms with my Dad's unexpected passing. I have struggled to find my feet, and to get anchored in the present again. My beautiful wife Kim and my (mental) kids have been amazing, and I think that I am ready to carry on in earnest. Long story short, I am getting my mojo back a bit now, so expect a big update in the next 48h - there might even be a bit of skin on show! 😉
  5. Nelliekins

    ICF's soaking up the plasticizer

    We have approx 1200m of LSZH twin and earth installed in our ICF build. Costs a chunk extra, to be sure - first, because its roughly 30% more expensive to buy 6242b cable than the same thickness of the usual grey 6242y cable; second because you're embedding the cable in insulation, you have to derate the cable. That means you end up running radials and rings in 4mm2 cable instead of 2.5mm2. Here's an idea of the hell I am in with cabling... That will one day be a home automation system, with DMX controlled lighting and power circuits, and either Loxone or Unipi managing it all. For now, it's just my nightmare that comes true every time I visit site. 😭
  6. One question - are the blocks sized off of metric or imperial measures? In particular, the spacing of the webs in my Logix build has been a complete ache of the dangles. You end up either using grab adhesive at the edge of plasterboards or having stacks of 185mm rips taken off your boards because the plasterboard is 1200mm wide and the Web spacings are 8" (203mm). Blooming annoying, especially since you can't just stick plasterboard offcuts in general rubbish! 😠
  7. Nelliekins

    Steel staircase on the cheap

    Yep I think so... Unless you have a better idea? In you look back to the early pics, the steel isn't in great condition - grinding off rust for the welding revealed a few pockets of over 3mm depth - not great for steel advertised as "clean"!
  8. Nelliekins

    Steel staircase on the cheap

    1. Remove the temp treads (they're just scaffold planks sawn down to fit) 2. Clean up the PFC by wire brushing it and then maybe a coat of red oxide 3. Build the handrail (4x2 timber screwed to the box section steel, plasterboarded on both faces) 4. Tek bolt timbers to the underside of the PFC 5. Fit oak treads and risers (fixed from behind /underneath) 6. Underboard the PFC with plasterboard, finishing flush with the bottom of the handrail 7. Sleep 🙂
  9. Nelliekins

    Steel staircase on the cheap

    OK so a bit further forward today - handrail uprights are fully secured and a temporary handrail attached for safety... Next up are the oak treads and risers, and the full plasterboard handrail / wall.
  10. Nelliekins

    Steel staircase on the cheap

    Yeah, but the steel is rusty as anything and I want to cover it underneath... Just found a sawmill all of 2 miles from my house that specialises in oak machining at absurd prices!! An example - 900x240x30mm treads for £8!
  11. Nelliekins

    Steel staircase on the cheap

    Lancashire. The box section projects into cantilever so we can just screw the tread to the riser in an L shape and attach to the box section from underneath. But sleepers could still be sliced down if they're at least 235mm wide / deep. Screwed through the box section steel from underneath. Yep. Scientists have a word for it... Heavy. 😁 The PFC weighs 23.6kg per linear metre (because it was mislabelled as 180x75 when it was 180x90), with just over 11m in total. The box section weighs too little to care about - perhaps 35kg all in. Inclusive of the timber we are looking at about 350kg including the timber. Next time we will use 120x65 PFC instead of this absurdity! But at least this won't bend or bounce!
  12. Nelliekins

    Steel staircase on the cheap

    All being well it'll have a steel framed handrail welded on tomorrow, and nobody on site before that part gets underway anyway! The uprights for the handrail were cut this afternoon, and both the 4x2 timber and the plasterboard are in the garage ready to attach to it. We even have a variety of tek bolt lengths to get the best fit without sharp bits sticking through anywhere! 😁 The treads are proving more of a challenge, actually. The basement stairs are just spruce planks chopped down to 900mm wide. I thought of doing the same here but since we have a load of oak doors going in am wondering if we shouldn't get a better match for them... Anyone know where to get cheap oak planks from? Looking for a big pile (30!) of 900x240x38 treads and 900x185x38 risers to match... For now I am going to saw through a set of scales planks I have lying around - the treads will be a bit short but they will easily carry over the 620mm span at least, and they only cost a tenner each!
  13. Nelliekins

    Steel staircase on the cheap

    Ok so another visit from my welding friend, and we still aren't finished... 😒 Making progress at least : The old temporary status have been dismantled and the tread supports are now welded on fully. The "square" section for the landing is warped though - the top flight is 900mm apart from the top to the crank point, and then is 15mm too narrow where it goes into the wall. Rather than try to straighten the cranked beams, we are just going to pack off the face before the last riser. Next up is the handrail - we are going to place 1.5m lengths of 50mm box section welded to the side of the cranked beams on the right hand side (going up). 5 lengths, spaced at around 1 apart, should be good enough to attach a timber and plasterboard wall to...
  14. Nelliekins

    Steel staircase on the cheap

    As an aside, I just noticed that although the PFC is marked as 180x75 its actually 180x90. Wondered why it was so damned heavy lifting into place! Next time I think I will use something lighter like 125x65, because this stuff is insanely strong / rigid and is massive overkill!
  15. Nelliekins

    Steel staircase on the cheap

    OK so it didn't go quite to plan... Bottom flight seems perfect - exactly 190mm rise on each tread of 240mm (although the treads aren't fitted yet). However the top flight has gone completely wrong. First, it transpires that using a spacer between treads when welding only works if it doesn't react to temperature... I used a piece of 140x38 CLS timber, having measured it first to confirm the size. However after getting warm through proximity to a welded joint, it distorted to 138mm on one side and 141mm on the other... But I didn't notice. Second, spacers are all well and good, but when the steel you're welding isn't actually the expected dimensions, you end up with an incremental error. Our 50mm box section came in 2 lengths - one was cut for the bottom flight and was nigh on perfect. The other was cut for the top flight, and according to a friend's caliper is 51.6mm. Doesn't sound a lot does it? However, that and the warped timber amounts to an error of 15.6mm on the top of a 6-tread flight. That's a problem. What's worse, there's a 4mm difference in the floor-to-floor height between where I measured and where the stairs start (because there's no way to measure directly where the stairs start - you have to use a laser to transfer the mark). So that's made the top step approx 20mm too shallow on the rise. Here's where we are at now - partially dismantled upper flight, so that we can adjust all the box section bits and make it right. Can't even do it in situ because the EPS isn't safe around fire!