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A lean-to shelter is a simplified free-standing version of a wilderness hut with three solid walls and a single- or, in the case of an Adirondack lean-to, offset-pitched gable roof. The open side is commonly oriented away from the prevailing weather. Often it is made of rough logs or unfinished wood and used for camping.
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. A roof that rises 3 inches per foot, for example, would ...
Shed roof. Shed roof attached to a barn. A shed roof, also known variously as a pent roof, lean-to roof, outshot, catslide, skillion roof (in Australia and New Zealand), and, rarely, a mono-pitched roof, [1] is a single-pitched roof surface. This is in contrast to a dual - or multiple-pitched roof.
Grade (slope) The grade (US) or gradient (UK) (also called stepth, slope, incline, mainfall, pitch or rise) of a physical feature, landform or constructed line refers to the tangent of the angle of that surface to the horizontal. It is a special case of the slope, where zero indicates horizontality. A larger number indicates higher or steeper ...
The calculations involve some basic trigonometry but these calculations can easily be done on any inexpensive scientific calculator. Sine height measurement. Situations where the top of the tree being measured is above eye level and the base of the tree being measured is below eye level is the most common situation encountered in the field.
Cant (road and rail) Cant in a velodrome. The cant of a railway track or camber of a road (also referred to as superelevation, cross slope or cross fall) is the rate of change in elevation (height) between the two rails or edges of the road. This is normally greater where the railway or road is curved; raising the outer rail or the outer edge ...
A circular linhay is an ancient type of structure found in England, particularly associated with Devon. Linhay (rhymes with finny), also spelt Linny, is a type of farm building with an open front and usually a lean-to roof. [1] In Newfoundland English a linney is similar to a storage space, kitchen, or porch but as an addition to the rear of a ...
Stability and control derivatives are used to linearize (simplify) these equations of motion so the stability of the vehicle can be more readily analyzed. Stability and control derivatives change as flight conditions change. The collection of stability and control derivatives as they change over a range of flight conditions is called an aero model.