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1 Romanesque moulding carved to resemble a chain.

2 Piece of timber or metal built into a brick wall to increase its stability and cohesion, called chain-bond.

3 Bond course of stone with one or more cramps connecting each pair of stones.

4 Complete circlet formed of a chain, used to prevent a circular work of masonry from spreading, e.g. in the dome of St Paul's Cathedral, London (begun 1675).

5 Chain-tie used to connect the heads of piers, etc., while vaults and arches are constructed.

6 If used to tie in bulging brickwork, an anchor is fixed to the end of the chain or rod, visible on the outside of the wall.

Subjects: Architecture.

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