.::. Some Random Terms .::. • Doeskin From sheep or lambskins usually with the grain removed. .... • Rafter, valley A rafter that forms the intersection of an internal roof angle. The valley rafter is normally made of double 51 mm (2 inch) thick members. .... • Pergola A covered walk in a garden, usually formed by a double row of posts or pillars with joists above and covered by climbing plants. ....