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A stair tread is the horizontal portion of a set of stairs on which a person walks. The tread can be composed of wood, metal, plastic, or other materials. In residential settings, treads can be covered in carpeting. Stair treads can come in non-slip varieties, particularly in commercial or industrial locations. [1]
The building was constructed as the headquarters for Armstrong Rubber Company, including office and research space. [6] The building originally had 183,000 square feet (17,000 m 2 ), [ 6 ] though IKEA demolished about 64,000 sq ft (5,900 m 2 ) of the building in 2003; the surviving structure is estimated at 107,100 sq ft (9,950 m 2 ).
The nosing is the protrusion beyond the riser when vertical risers are used, or beyond the back of the tread below, when angled risers or no risers are used. Anti-slip strips or nosings may be applied. These stair parts can be manufactured from a variety of materials including aluminum, vinyl, and wood.
Steps with two anti-slip rubber strips and small nosings. Each step is composed of a tread and a riser. Some treads may include a nosing. Tread: The part of the stairway that is stepped on. It is constructed to the same specifications (thickness) as any other flooring. The tread "depth" is measured from the back of one tread to the back of the ...
In 2011, Armstrong's net sales were $2.86 billion, with operating income of $239.2 million. [17] Armstrong Cabinets was sold by Armstrong World Industries to American Industrial Partners on October 31, 2012. Armstrong spun off its flooring business into a new company, Armstrong Flooring (NYSE: AFI) on April 1, 2016.
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