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			<title>Green Building Forum - fitting a joist into a steel</title>
			<lastBuildDate>Wed, 10 Jun 2026 16:32:59 +0100</lastBuildDate>
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		<title>fitting a joist into a steel</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6112&amp;Focus=86465#Comment_86465</link>
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		<pubDate>Thu, 05 Aug 2010 09:02:16 +0100</pubDate>
		<author>marsaday</author>
		<description>
			<![CDATA[I need to fit a joist into my 75mm x 200mm C channel.  I intend on buying a similar sized joist.  Do i need to shape the joist to go in properly? How do i do this?  2 C channels will be bolted together back to back, with a purlin sat in between.]]>
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		<title>fitting a joist into a steel</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6112&amp;Focus=86468#Comment_86468</link>
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		<pubDate>Thu, 05 Aug 2010 09:27:59 +0100</pubDate>
		<author>CWatters</author>
		<description>
			<![CDATA[One way is to "fill in" the C with timber then use regular joist hangers. The infill is bolted to the web. I think you can get tall hangers that can be wrapped over the top of the beam and fixed to a similar infill on the back - or at least to the timber/purlin between the back to back C channels. Just remember that joist hangers rely on "end restraint" (eg at the other end of the joist) to stop the heel of the joist pulling out of the hanger.]]>
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		<title>fitting a joist into a steel</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6112&amp;Focus=86469#Comment_86469</link>
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		<pubDate>Thu, 05 Aug 2010 09:30:46 +0100</pubDate>
		<author>CWatters</author>
		<description>
			<![CDATA[<a href="http://www.tradingdepot.co.uk/DEF/catalogue/Y004002/Building%20Supplies/Builders%20metalwork/Timber%20to%20Timber%20Jiffy%20Joist%20Hangers" target="_self" rel="nofollow">http://www.tradingdepot.co.uk/DEF/catalogue/Y004002/Building%20Supplies/Builders%20metalwork/Timber%20to%20Timber%20Jiffy%20Joist%20Hangers</a>]]>
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		<title>fitting a joist into a steel</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6112&amp;Focus=86471#Comment_86471</link>
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		<pubDate>Thu, 05 Aug 2010 09:47:48 +0100</pubDate>
		<author>owlman</author>
		<description>
			<![CDATA[Is it just one joist?]]>
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		<title>fitting a joist into a steel</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6112&amp;Focus=86472#Comment_86472</link>
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		<pubDate>Thu, 05 Aug 2010 09:49:25 +0100</pubDate>
		<author>marsaday</author>
		<description>
			<![CDATA[Yes i understand about hanging joists from this steel and filling in the C with a joist, but HOW do i get my timber into the steel?  As i understand it, it will be a different shape and so will need to be cut down a touch.  Has anyone any experience of doing this ?]]>
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		<title>fitting a joist into a steel</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6112&amp;Focus=86474#Comment_86474</link>
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		<pubDate>Thu, 05 Aug 2010 10:11:02 +0100</pubDate>
		<author>jon</author>
		<description>
			<![CDATA[If it's a bolted two C channel, it's unlikely to have a torsional rigidity problem and also unlikely to need effective lateral restraint.  Joists rarely have critical shear at the bearing.   Ask your engineer, but you may be able to just shape (jigsaw) and wedge the joist.]]>
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		<title>fitting a joist into a steel</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6112&amp;Focus=86476#Comment_86476</link>
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		<pubDate>Thu, 05 Aug 2010 10:52:16 +0100</pubDate>
		<author>marsaday</author>
		<description>
			<![CDATA[That is what i was going to do, but never done it before.  I will see how the joist fits into the steel when it arrives.<br /><br />Another question:  I am using wall plates to take the loading on the party and gable wall.  Should i use a 3" wide joist here instead of a 2" or does it not make any difference.]]>
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		<title>fitting a joist into a steel</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6112&amp;Focus=86520#Comment_86520</link>
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		<pubDate>Thu, 05 Aug 2010 20:29:10 +0100</pubDate>
		<author>chuckey</author>
		<description>
			<![CDATA[If the joist hanger is made fast to the top of the C beam, once the joist in put in it all will be well, the trouble is that with loading and vibration the bottom of the hanger will move inwards into the C and the joist will want to slide out. So the thing to do is to stop the bottom of the hanger bending inwards. A piece of wood (4&quot; X 2&quot;) of the length of the depth of the C and fastened at the bottom of the hanger going into the C will stop this happening. So cut your piece of 4&quot; X 2&quot; nail in to the back of the hanger, by a nail through the back of the hanger and hang hanger. If you put a piece of wood at the top of the hanger's back, this actually takes no load because the top of a joist shortens when it is loaded.<br />    3&quot; or 2&quot; wall plate - depends on how far apart your fixings are for the wall plate. 2&quot; should do if the fixings are at the joist spacing.<br />     Frank]]>
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		<title>fitting a joist into a steel</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6112&amp;Focus=86536#Comment_86536</link>
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		<pubDate>Fri, 06 Aug 2010 09:59:13 +0100</pubDate>
		<author>Timber</author>
		<description>
			<![CDATA[Just cut and notch the end of the joist then wedge it into the C section Much better and easier than messing around with hangers. You can then block out between the joists with timber to stop them moving. This can be screwed, bolted or (my personal favourite) shot fired into the steel.<br /><br />Timber]]>
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		<title>fitting a joist into a steel</title>
		<link>https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=6112&amp;Focus=86540#Comment_86540</link>
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		<pubDate>Fri, 06 Aug 2010 10:17:06 +0100</pubDate>
		<author>owlman</author>
		<description>
			<![CDATA[Agreed; Timber.<br />marsaday, If you want to be very fussy about shaping the ends of the joists precisely to allow for the steel shape, simply make by hand a simple MDF template, and just transfer the shape to each joist end, perfect fit every time. If you're plasterboarding onto the underside, cut the joists to underhang the RSJ very slightly, so that the subsequent plasterboard is just off the steel.]]>
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