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Ridge-post framing is an old type of timber framing. The ridge board of their roof is not carried by king posts based on tie beams, but the ridge posts are based on the ground work. The German term for this construction is Firstständerhaus .
Two king post trusses linked to support a roof. Key:1: ridge beam, 2: purlins, 3: common rafters. This is an example of a "double roof" with principal rafters and common rafters. A timber roof truss is a structural framework of timbers designed to bridge the space above a room and to provide support for a roof.
Ridge – A post extending from the ground or foundation to the ridge beam. Samson – similar to a prick post or puncheon. Puncheon: 1) A short, stout post may be identical to a prick post; 2) Puncheon may also mean a split log or heavy slab of timber with the face smoothed, used for flooring or construction.
The rafters are the beams of wood angled upward from the ground. They meet at the top of the gable at a ridge beam , which has extra bracing to attach it to the rafters. The purlins are the large beams perpendicular to the rafters; from this shot, it appears that there are three purlins on either side of the roof.
Ridge-post framing is a structurally simple and ancient post and lintel framing where the posts extend all the way to the ridge beams. Germans call this Firstsäule or Hochstud . Modern timber connector method (1930s–1950s)
Post and beam is a general term for building with heavy timbers. More specific types of post and beam framing are: Timber framing, an ancient traditional method of building using wooden joinery held together with pegs, wedges and rarely iron straps; Post and lintel, a simple form of framing with lintels resting on top of posts
The middle example is created by an extension of a simple supported beam (such as the way a diving board is anchored and extends over the edge of a swimming pool). The bottom example is created by adding a Robin boundary condition to the beam element, which essentially adds an elastic spring to the end board. The top and bottom example may be ...
The top ends of the rafters often meet at a ridge beam, but may butt directly to another rafter to form a pair of rafters called a couple. Depending on the roof covering material, either horizontal laths , battens , or purlins are fixed to the rafters; or boards, plywood , or oriented strand board form the roof deck (also called the sheeting or ...