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2. Cable railing - Wikipedia

   en.wikipedia.org/wiki/Cable_railing

   In a horizontal or vertical cable rail, the cables, once tensioned must be rigid enough to prevent a 4-inch sphere passing through it. Factors influencing this rigidity are: the tension of the cable, intermediate posts (or cable spacers) spacing, the diameter of the cable, top rail cap material and the cable to cable spacing. [7]

3. List of steepest gradients on adhesion railways - Wikipedia

   en.wikipedia.org/wiki/List_of_steepest_gradients...

   These include simple rail adhesion, rack railways and cable inclines (including rail mounted water tanks to carry barges). To help with braking on the descent, a non-load-bearing "brake rail" located between the running rails can be used, similar to the rail used in the Fell system, e.g. by the Snaefell Mountain Railway on the Isle of Man.

4. 19-inch rack - Wikipedia

   en.wikipedia.org/wiki/19-inch_rack

   The size denotes the width of the faceplate for the installed equipment. The rack unit is a measure of vertical spacing and is common to both the 19 and 23-inch racks. Hole spacing is either on 1-inch (25 mm) centers (Western Electric standard), or the same as for 19-inch (482.6 mm) racks (0.625 in or 15.9 mm spacing).

5. Deck railing - Wikipedia

   en.wikipedia.org/wiki/Deck_railing

   Stainless-steel cable and fasteners are strong and don’t obscure the view. Contemporary frame systems use plastic-coated steel cables. [6] Glass balusters and glass panels are often used at contemporary architectural projects where unobstructed view is important. [7] All-glass railing without a top rail can be used to maximize the effect. [8]

6. Cable tray - Wikipedia

   en.wikipedia.org/wiki/Cable_tray

   Lighter cable trays are more appropriate in situations where a great number of small cables are used, such as for telephone or computer network cables. These trays may be made of wire mesh, called "cable basket", [2] or be designed in the form of a single central spine (rail) with ribs to support the cable on either side.

7. Electrical length - Wikipedia

   en.wikipedia.org/wiki/Electrical_length

   Electrical length is widely used with a graphical aid called the Smith chart to solve transmission line calculations. A Smith chart has a scale around the circumference of the circular chart graduated in wavelengths and degrees, which represents the electrical length of the transmission line from the point of measurement to the source or load.