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A window screen (also known as insect screen, bug screen, fly screen, flywire, wire mesh, or window net) is designed to cover the opening of a window. It is usually a mesh made of metal, fibreglass , plastic wire, or other pieces of plastic and stretched in a frame of wood or metal.
Cages: Cages are optional for fixed ladders with a floor to floor elevation of less than 20' (6100 mm). They are often available for ladders with elevation changes down to 11' (3350 mm). Cages are mandated to begin between 7' and 8'(2250 mm) from the ground and extend the entire length of the ladder.
A ladder standoff, or stay, is a device fitted to the top of a ladder to hold it away from the wall. This enables the ladder to clear overhanging obstacles, such as the eaves of a roof, and increases the safe working height for a given length of ladder because of the increased separation distance of the two contact points at the top of the ladder.
Open the window you want to resize or move. Click and drag the outside border of the window to modify its size. Click and drag the top bar of the window to reposition it on your screen. To save or reset your adjustments, click Window | Save Window Size and Position or Reset all Window Sizes and Positions.
The British version was a conventional two-string ash ladder around 4 metres (13 ft) long and 25 centimetres (10 in) wide. Hook ladders can be used to scale from floor to floor on multi-storey buildings by way of exterior windows. The ladders hook onto the window ledge by a "gooseneck" projecting from the top.
To clip and scotch a set of railway points (Amer. a switch) uses two pieces of equipment to temporarily lock a set of points into a particular position. [1] The point clip clamps the end of a moving rail (the switch rail ) of a set of points to its associated stock rail , and the scotch is a timber wedge used to ensure that the other moving ...