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Among its basic uses are marking common, hip, valley and hip, or valley jack rafters, laying out stair stringers, determining and marking angles, and making square cuts on boards. 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.
The minimum width of the handrail above the recess shall be 1 + 1 ⁄ 4 inches (32 mm) to a maximum of 2 + 3 ⁄ 4 inches (70 mm). Edges shall have a minimum radius of 0.01 inches (0.25 mm). Handrails are located at a height between 34 and 38 inches (864 and 965 mm).
The dimensions of a stair, in particular the rise height and going of the steps, should remain the same along the stairs. [14] The following stair dimensions are important: The rise height or rise of each step is measured from the top of one tread to the next. It is not the physical height of the riser; the latter excludes the thickness of the ...
Freehand lettering is done without the assistance of tools. To regulate lettering height, commonly 3 mm (1 ⁄ 8-in), guidelines are drawn.Mechanical lettering is done using tools such as lettering guides, templates, or using a small mechanical pantograph referred to by the Keuffel and Esser trademark "Leroy"
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A strongback in a staircase is usually ordinary two-by dimensional lumber attached to the staircase stringers to stiffen the assembly. In shipbuilding , a strongback, known as a waler is oriented lengthwise along a ship to brace across several frames to keep the frames square and plumb. [ 1 ]
A dog-leg staircase A quarter-landing, on a dog-leg staircase, is made into an architectural feature, by the use of arches, vaulting and stained glass. A dog-leg is a configuration of stairs between two floors of a building, often a domestic building, in which a flight of stairs ascends to a quarter-landing before turning at a right angle and continuing upwards. [1]