Originally posted by Ukjay
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believe it or not that is a portal for a roof of a house ...... a big house .... a big timber framed house .... that the architect made a **** up on when he forgot to include any structural supports in the centre of the building.
so this supported the entire roof in one span from the outer walls.
Used to do a hell of a lot of steel work for a big timber frame outfit, mostly roof steel work, as it gave usable attic space instead of a loft full of trusses ........ have no idea just how many portals, semi portals and cranked rafters we made for them over the years, but could well run into thousands !!
they also did a lot of doctor's surgeries and a few care homes which had large open areas which also needed a fair amount of steel work in the form of 'goal-post' like structures ..... big ones , plus of course nice big open plan attics.
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