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The Scottish Yard have just finished the erection of a frame that they have had in storage for over 2 years. The circular grain store with it’s conical roof is a familiar sight on traditional Scottish farmsteads, although this was a new build project. The clients, who are farmers, were keen that their new farm house should not only blend in with the local vernacular, but also have a high standard of finish, and so have been meticulously overseeing each element of the build. The roundel was an obvious addition as it is not only architecturally in keeping, but allows them to enjoy the stunning panoramic views from their new plot.
Bow string trusses spring from the central boss
The roof consists of eight bowstring trusses springing from a central octagonal boss, all in planed and oiled green oak. The trusses themselves are tensioned with slender 8mm diameter stainless steel wire rope. This is all exposed internally to give a clear open span vaulted ceiling. On top of these trusses are softwood common rafters housing the insulation zone and two layers of cross bonded sarking.
Cross bonding the sarking
As an added geometrical challenge the roundel adjoins the main farmhouse, and so the cone is bisected where it butts against the main farmhouse. So each timber including the softwood was laid out in our workshops to ensure this geometrical jigsaw would fit together smoothly on site.
Word from site was that, despite the frame lying in storage for such a long time it went together with the minimum of fuss, with only a few minor tweaks required. Infact, since the site is relatively exposed the main difficulties arose from snow storms preventing the crew from reaching it!
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