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A bed frame includes head, foot, and side rails. [1] The majority of double (full) beds and all queen- and king-sized beds necessitate a central support rail, often accompanied by additional feet that extend towards the floor for stability. The concept of a "bed frame" was initially introduced and referred to between 1805 and 1815. [1]
The recall involves three models of Medical King Bed Assist Rail with Adjustable Heights (model numbers 7007 and 7057) and the Bed Assist Rail Without Legs (model number 7037).
The appropriate thickness of a layer of track ballast depends on the size and spacing of the ties, the amount of traffic on the line, and various other factors. [1] Track ballast should never be laid down less than 150 mm (6 inches) thick, [5] and high-speed railway lines may require ballast up to 0.5 metres (20 inches) thick. [6]
A railway track (CwthE and UIC terminology) or railroad track (NAmE), also known as permanent way (CwthE) [1] or "P Way" (BrE [2] and Indian English), is the structure on a railway or railroad consisting of the rails, fasteners, sleepers (railroad ties in American English) and ballast (or slab track), plus the underlying subgrade.
Rails manufactured to the 1905 standard were referred to as "O.B.S." (Original), and those manufactured to the 1924 standard as "R.B.S." (Revised). [14] Bullhead rail has been almost completely replaced by flat-bottom rail on the British rail system, although it survives on some branch lines and sidings.
EN 16729: Railway applications – Infrastructure – Non-destructive testing on rails in track EN 16729-1: Part 1: Requirements for ultrasonic inspection and evaluation principles; EN 16729-2: Part 2: Eddy current testing of rails in track; EN 16729-3: Part 3: Requirements for identifying internal and surface rail defects