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2. Roof pitch - Wikipedia

   en.wikipedia.org/wiki/Roof_pitch

   Roof pitch is the steepness of a roof expressed as a ratio of inch(es) rise per horizontal foot (or their metric equivalent), or as the angle in degrees its surface deviates from the horizontal. A flat roof has a pitch of zero in either instance; all other roofs are pitched .

3. List of roof shapes - Wikipedia

   en.wikipedia.org/wiki/List_of_roof_shapes

   Pavilion roof : A low-pitched roof hipped equally on all sides and centered over a square or regular polygonal floor plan. [10] The sloping sides rise to a peak. For steep tower roof variants use Pyramid roof. Pyramid roof: A steep hip roof on a square building.

4. Gambrel - Wikipedia

   en.wikipedia.org/wiki/Gambrel

   The oldest surviving framed house in North America, the Fairbanks House, has an ell with a gambrel roof, but this roof was a later addition. Claims to the origin of the gambrel roof form in North America include: Indigenous tribes of the Pacific Northwest, the Coast Salish, used gambrel roof form (Suttle & Lane (1990), p. 491). [10]

5. Gothic-arch barn - Wikipedia

   en.wikipedia.org/wiki/Gothic-arch_barn

   George Obendorf Gothic Arch Truss Barn, built from Sears Roebuck parts, in Idaho. A Gothic-arched roof barn or Gothic-arch barn or Gothic barn or rainbow arch [1] is a barn whose profile is in the ogival shape of a Gothic arch. These became economically feasible when arch members could be formed by a lamination process.

6. Square (tool) - Wikipedia

   en.wikipedia.org/wiki/Square_(tool)

   Speed square, or rafter square, or rafter angle square, or triangle square, or layout square A speed square is a triangular carpenters square combining functions of the combination square, try square, and framing square into one. It can be used to calculate and mark angles, to suspend a plumb bob, and as a fence for a circular saw. [21] [22] [23]

7. Speed square - Wikipedia

   en.wikipedia.org/wiki/Speed_square

   Common lines made using a speed square include perpendicular cut marks and Angles definition of an angle for roofs, stairways, and decks. The tool uses a 0° reference. This means when a board is squared off the tool reads 0°. The angle derived is actually a complementary angle, for example a 22.5° angle is actually 67.5°. The sum of the ...

8. Skew arch - Wikipedia

   en.wikipedia.org/wiki/Skew_arch

   Colorado Street Bridge, an example of a false skew arch. The strength of a regular arch (also known as a "square" or "right" arch) comes from the fact that the mass of the structure and its superincumbent load cause lines of force that are carried by the stones into the ground and the abutments without producing any tendency for the stones to slide with respect to one another.

9. American historic carpentry - Wikipedia

   en.wikipedia.org/wiki/American_historic_carpentry

   A type of trussed plank frame barn in Sweden is representative of some types in America, the lack of heavy timbers in the framing give it the name plank frame barn. Plank-framed barns [22] are different than a plank-framed house. Plank framed barns developed in the American Mid-West, such as the patente in 1876 (#185,690) by William Morris and ...