What is the name for a beam where its "core" is made of a "zig-zag" of metal and the top and bottom surfaces are made of (ply?) wood. Or is that just bit of fake news, a product of a deranged imagination?
On 15/02/2018 00:55, firstname.lastname@example.org wrote:
Standard fitment in all new houses. Much stiffer and stronger
so less of those creaky chipboard floors that 70's houses
The 22mm chipboard or t&g plywood flooring is glued on all
four sides and also glued onto the top section of the beam.
When the glue has set, they cut a hole where the stairs pass through.
Makes first fit electrics a lot easier, because there are no holes
to drill. I-beam versions where the web is OSB usually have knockouts
in the correct places.
On Thursday, 15 February 2018 13:35:57 UTC, Andrew wrote:
Metal web joints. Thanks all for that.
So if most (all?) residential new builds use MWJ (as known to its friends)
as a base for ceiling plasterboard and floor ply, can they be used for loft
extensions where they are fixed to the walls slightly above existing ceili
ng joists? The lightness, and sufficient (?) strength in comparison to "ste
els" would in my uninformed position, make MWJ the ideal base for the floor
in a loft extension. Or do they have shortcomings that prohibit their use
in loft extensions?
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