Framing used to support an arch or dome while it is under construction.
- ‘Brunelleschi won the contest in 1420 with a proposal to erect the dome without wooden centering.’
- ‘The centring is normally made of wood which was a relatively straightforward structure in a simple arch or vault but with more complex shapes clay or sand bound by a weak lime mortar mix could be used.’
- ‘The shaping of this sort of centring would probably be done by eye, perhaps with the help of a template and the stone or brick structure laid against it.’
We take a look at several popular, though confusing, punctuation marks.