In addition to advantages in aesthetics and wear, they are also easier to maintain by ( replacing small patches ), and ( depending on the brick and wall type ) can be more insulating . talk ) 16 : 23, 5 March 2013 ( UTC)
12.
It is not clear how Douglas came to possess Tantallon, Douglas may have been made castellan of Tantallon, as a tenant of Isabella, Countess of Fife, It was intended as a status symbol, although it followed the medieval curtain wall type, which at the time was becoming outmoded and superseded by the tower house.
13.
However, Steep Rocky Creek Railway Bridge in 1906 departs completely from stone forms and has wall type arches supporting vertical diaphragms with a deck slab carrying the track and ballast; this bridge was built to cross a ravine in rugged country and represents a similar design and technical developments to meet similar requirements to that at Humphery, which was completed a few years later.
