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Glossary

Purlin
Horizontal longitudinal timber in a roof structure. Collar purlin or crown plate: central timber which carries collar-beams and is supported by crown-posts. Side purlins: pairs of timbers placed some way up the slope of the roof, which carry common rafters. Butt purlins or tenoned purlins are tenoned into either side of the principals. Through purlins pass through or past the principal; they include clasped purlins, which rest on queenposts or are carried in the angle between principals and collar, and trenched purlins which are trenched into the backs of principals.
Putlog holes
Holes in a wall to receive putlogs, the horizontal timbers which support scaffolding boards; sometimes not filled after construction is complete. Also called putholes or putlock holes.
Putto (plural: putti)
Small naked boy.
Quadripartite rib-vault
A vault with two pairs of diagonal ribs dividing each bay into four triangular compartments or cells.
Quarries
Square (or diamond) panes of glass supported by lead strips (cames); square floor slabs or tiles.
Quatrefoil
A four-lobed opening.
Quattrocento
The Italian Renaissance architecture of the 15th century; also used for its 19th-century revival.
Queen-struts
Paired vertical or near-vertical timbers placed symmetrically on a tie-beam of a roof to support the rafters, and not directly attached to the longitudinal timbers.
Queen Anne
Salisbury Court
City of London
Not to be confused with the architecture of the reign of Queen Anne (1702-14), this usually refers to a later Victorian style that sought to revive the domestic classical manner of the mid 17th century. It favoured red brick or terracotta, usually combined with white-painted woodwork. It is particularly associated with the architect Richard Norman Shaw (1831-1912) and with the turn away from the Gothic Revival.
Queenposts
Paired vertical or near-vertical timbers placed symmetrically on a tie-beam of a roof to support purlins (horizontal longitudinal timbers).

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