American 3-Way Lighting Systems - Page 3


Paschall Interlocking System of Sidewalk Lights
In glass area, the most important item in sidewalk lights, the Paschall System is by far the leader. The glass surface on the top approximates 50% of the total and on the underside it reaches the big proportion of approximately 75%. More glass means more light, and as some other constructions show glass surface of only from 25% to 40%, the great superiority of the Paschall can be instantly appreciated.	Details of Paschall Interlocking Sidewalk Construction

View of basement lit with Paschall System

Because of this large percentage of glass surface, it is not necessary, with the Paschall System, to install such a large part of the sidewalk in light construction as it is with other makes, to secure the same amount of illumination in the basement. This means a saving at the outset. And if the same amount of Paschall construction is installed, as was figured for the less efficient types, the illumination will be proportionately greater. Hence, requiring less artificial light, meaning a continued saving.

    The strength of the Paschall construction is another point in which the competitors are also followers. Made of steel I bars of 1½ inch breadth, interlaced at regular intervals, of 4½ inch centers with 1 inch flat steel rods, the entire frame is of such strength that, for the average opening up to six feet, no parallel supporting beams are necessary. Another saving to the builder. The I bars are in reality carrying beams themselves and there is one for every row of glass.
    All metal work on the Paschall construction is made up in either natural iron, galvanized or painted finishes. This is all formed in a finished grid with the angle iron sidebars, for the expansion joint, made an integral part of the same. And with the metal work all preformed the specified amount of glass area must be given.
    Each tile of glass rests on the flat steel cross bars on the two sides, the other two sides are set under the head of the I bar, thus locking each into place. After the glass is dropped into its seat the cement is spread, being worked well down around the glass an steel bars.