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Stair dust corners are used on staircases at the point where the tread, riser, and stringer meet. Dust corners make household chores such as sweeping and vacuuming more convenient. [1] Stair dust corners originated in the 1880s, during the Victorian era. Dust corners typically have a small hole in the middle so a nail can be hammered into the ...
CPP and CPR methods, developed over the last 40 years, are used in lieu of asphalt overlays and bituminous patches to repair roads when longer lasting solutions are desired. When installing pavers over top of an existing asphalt of concrete pad, there are three installation options: sand set, bituminous set, and mortar set. [1]
Concrete creep is essentially the sagging of concrete over time. Creep and shrinkage of concrete are two physical properties of concrete.The creep of concrete, which originates from the calcium silicate hydrates (C-S-H) in the hardened Portland cement paste (which is the binder of mineral aggregates), is fundamentally different from the creep of metals and polymers.
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Good lighting is important in a staircase so users see where they are going and to prevent falls. [6] There is often a window on the wall to let in daylight.In many cases, indoor stairs are placed far inside the building structure, and it is often not easy to get access to a wall on the outside where it would be natural to have a regular window for letting daylight in.
A stair flight is a run of stairs or steps between landings. A stairwell is a compartment extending vertically through a building in which stairs are placed. A stair hall is the stairs, landings, hallways, or other portions of the public hall through which it is necessary to pass when going from the entrance floor to the other floors of a building.
The sharp corner at the brick has acted as a stress concentrator within the concrete causing it to crack. The de Havilland Comet aircraft experienced a number of catastrophic failures that were eventually found to be due to fatigue cracks growing from the high stress concentration caused by the use of punched rivet holes around the windows. The ...
The Exorcist steps in Georgetown, Washington, D.C.. The Exorcist steps are concrete stairs, continuing 36th Street, [1] descending from the corner of Prospect St and 36th St NW, down to a small parking lot, set back from the intersection of M Street NW, Canal Rd NW, and Whitehurst Freeway NW in the Georgetown neighborhood of Washington, D.C., famous for being featured in the 1973 film The ...