Trail:

Glossary

Transe
(Scots): A passage, especially a screens passage, i.e. a screened-off entrance passage between great hall and service rooms in an older house or college.
Transept
Transverse portion of a church.
Transeptal chapel
A chapel in the position of a transept and opening to the nave through a single arch, but without a full central crossing.
Transitional
Somerset
Generally used for the period c. 1175 – c. 1200, between Norman and the first (Early English) period of Gothic, in which details of the later style are often used on the general forms of the earlier.
Transom
Horizontal member separating window lights.
Transverse arch
An arch spanning a main axis (e.g. of a vaulted space).
Transverse rib
A rib spanning between two walls to divide a rib-vault into bays.
Tread
Horizontal part of a step. The tread end may be carved on a staircase.
Trefoil
A three-lobed opening.
Trenched purlins
Purlins (horizontal longitudinal timbers in a roof structure) which are trenched into the backs of the principals.