EGR 290 Lecture Notes - Lecture 6: Internal And External Angles, Eaves, Soffit
Document Summary
A roof is a unit which covers the top of a building. It serves to protect the structure from the weather and adds beauty to the design. Roofs are built with wood, concrete or steel frames that are covered with decking and then a weather resistant roofing material. The shape chosen by architects and engineers depends upon factors such as: the size of the structure, the design of the structure, climatic conditions, cost, appearance. This type is not often used on large spans, but more often found as a covering for a rear or side extension to a larger building. The lean-to varies to suit requirements and the upper end of the rafter is fixed to a wall piece which can be corbelled or bolted to the wall. The foot of the rafter is normally birds-mouthed (notched) over a wall plate.
