Whilst polygonal walls are a feature of a number of Mediterranean countries, perhaps the most famous polygonal walls are the Inca walls of Peru, of Machu Picchu, Cuzco and llantaytambo. These walls take `tightness` to extremes, as can be seen from the cover photo of the famous ”12 sided stone of Hatunrumiyoc” in the wall…
The content below was copied with the generous permission of the author Sean Adcock. This Master Class article originally appeared in the Autumn 2008 issue of Stonechat, produced by the North Wales Branch of the Dry Stone Walling Association of Great Brittan. This entire issue of Stonechat, and many more, are available at http://www.dswales.org.uk/Stonechat.html Thank…
The last two instalments of “Masterclass” have examined the theory of corbelling and its effect on a couple of practical considerations. Hopefully I have established the following, in no particular order: tilting stones can be swings and roundabouts with regard to what can be gained by being able to extend a stone out further over…
In the Autumn 2010 issue of Masterclass by Sean Adcock, he continues the topic of Corbelling starting with “Last time we saw how with given uniform stone (or playing cards/dvd boxes!) a dome can be formed according to a neat formula, the main point of which is that initially you can only extend the stone…
Not sure this should really be called a masterclass seeing as how I’ve never really carried out structural corbelling. Mind you I don’t suppose it’s ever stopped me spouting on authoritatively before, so why stop now? I have of course used the principle of cantilevering, have some experience of in effect corbelling the bottom and…
In the Spring 2010 issue of Masterclass by Sean Adcock, the topic is Settling. Here’s how he starts “I was recently asked to comment on the efficacy of/necessity for a cover band, in any situation other than on a wall for which you have either insubstantial or insufficiently wide copes to span its width, and…
