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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 most common alloy used for aluminium tread plate is 6061, although 5086-H34 and 3003-H231 are also used. [1] Diamond plate is usually steel , stainless steel or aluminium . Steel types are normally made by hot rolling , although modern manufacturers also make a raised and pressed diamond design.
Led by Chicago industrialist and inventor Carl Strandlund, who had worked with constructing prefabricated gas stations, Lustron offered a home that would "defy weather, wear, and time." [2] Strandlund's Lustron Corporation, a division of the Chicago Vitreous Enamel Corporation, set out to construct 15,000 homes in 1947 and 30,000 in 1948. [1]
[16]: 19 Alternating tread stairs can be designed to allow for a safe forward-facing descent of very steep stairs (however, designs with recessed treads or footholds do not have this feature). The treads are designed such that they alternate between treads for each foot: one step is wide on the left side; the next step is wide on the right side.
That year, the Aladdin Company of Bay City, Michigan, offered the first kit homes through mail order. In 1908, Sears issued its first specialty catalog for houses, Book of Modern Homes and Building Plans, featuring 44 house styles ranging in price from US $360 (equal to $12,208 today) – $2,890 (equal to $98,003 today). The first mail order ...
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