Tue, 14 Jul 2026 14:05:08 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212562#Comment_212562 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212562#Comment_212562 Tue, 04 Nov 2014 17:20:50 +0000 slidersx200
The roof trusses are due to arrive on site this Thursday and hopefully we can get things pretty weather tight before the predicted severe winter sets in.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212563#Comment_212563 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212563#Comment_212563 Tue, 04 Nov 2014 17:38:17 +0000 slidersx200 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212564#Comment_212564 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212564#Comment_212564 Tue, 04 Nov 2014 17:38:59 +0000 slidersx200 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212565#Comment_212565 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212565#Comment_212565 Tue, 04 Nov 2014 17:40:07 +0000 slidersx200 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212566#Comment_212566 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212566#Comment_212566 Tue, 04 Nov 2014 18:12:45 +0000 Mackers https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212571#Comment_212571 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212571#Comment_212571 Tue, 04 Nov 2014 18:52:38 +0000 slidersx200 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212592#Comment_212592 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212592#Comment_212592 Wed, 05 Nov 2014 07:10:03 +0000 DarylP
Who did your SE calcs for the metal web joists? I ask because we had to overspec beyond what the mfr offered. to 406mm at 400c/cs 5.4m span.
They still bounced a little, with 22mm glued chipboard finish , herringbone straps @ 1/3 span and strongback, but the p/b ceiling stiffened it up nicely.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212594#Comment_212594 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212594#Comment_212594 Wed, 05 Nov 2014 08:40:44 +0000 slidersx200
There are only two rooms that have the full 5.3m span without a supporting wall below, so hopefully we will get away with it!

I originally wanted to use 219mm joists to increase headroom upstairs, but we didn't need to as it turned out that the natural coursing of the block work has made the wall plate level a little higher. The 219mm joists would have worked at 400mm centres, but this route was quite a bit more expensive and gave less room for running services.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212599#Comment_212599 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212599#Comment_212599 Wed, 05 Nov 2014 11:26:57 +0000 borpin Posted By: slidersx200The design work was all done by the manufacturerWho was the supplier? Look an interesting system but why such a big 'joist' (trimmer?) at the end? How is the bottom element of the joist joined at the end?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212602#Comment_212602 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212602#Comment_212602 Wed, 05 Nov 2014 12:04:58 +0000 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212604#Comment_212604 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212604#Comment_212604 Wed, 05 Nov 2014 12:13:57 +0000 borpin Posted By: tonyhung there??]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212612#Comment_212612 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212612#Comment_212612 Wed, 05 Nov 2014 13:47:26 +0000 DarylP
Cheers]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212613#Comment_212613 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212613#Comment_212613 Wed, 05 Nov 2014 14:42:07 +0000 borpin Posted By: DarylPThey look like top-hung joists. The bearing is the top chord, the bottom just butts up against the plate.That was what I could see but wondered if I was right. Are these used in TF buildings at all? Just thinking there is minimal cold bridging, you could build the frame such that the joist was directly over a stud (as they should be anyway) and just a normal frame for it to sit on. Does it rely on the 'butt' for stability - can't see that it does. Just thinking.... Nice for services.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212618#Comment_212618 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212618#Comment_212618 Wed, 05 Nov 2014 16:27:13 +0000 PeterStarck https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212623#Comment_212623 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212623#Comment_212623 Wed, 05 Nov 2014 17:13:47 +0000 slidersx200
I tried to adapt the construction detail used at the Denby Dale Passivhaus to use cheaper materials and hopefully provide a more robust result. The trimmers are standard 9x2 timber that the supplier ripped to the correct size to line up with the bottom chord of the joists so there is somewhere solid to fix plasterboard to. The joists hang on the trimmer and are nailed to it at the bottom, saving a few hundred pounds on hangers and hardware. The trimmer is just bolted to the wall using "thunder bolts" and the holes were injected with sealant before the bolts were fitted.

We cut a roll of airtight membrane to ~50cm wide and ran that around the perimeter walls before installing the trimmers instead of using a large coat. It will be keyed to the wet plaster finish above and below when the time comes.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212626#Comment_212626 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212626#Comment_212626 Wed, 05 Nov 2014 18:11:31 +0000 slidersx200 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212627#Comment_212627 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212627#Comment_212627 Wed, 05 Nov 2014 18:13:11 +0000 slidersx200 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212632#Comment_212632 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=212632#Comment_212632 Wed, 05 Nov 2014 18:55:27 +0000 slidersx200 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=217975#Comment_217975 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=217975#Comment_217975 Fri, 23 Jan 2015 14:44:22 +0000 slidersx200
Windows and doors ordered, due in approx 5 weeks... cue typical TV programme glazing delays!]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=217981#Comment_217981 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=217981#Comment_217981 Fri, 23 Jan 2015 16:10:37 +0000 gustyturbine
Not that I am clock watching though

Looks like a good project.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=221277#Comment_221277 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=12748&Focus=221277#Comment_221277 Thu, 12 Mar 2015 23:32:08 +0000 slidersx200