Bruner Sidewalk Lights - 1911 Catalog - Page 11

ELIMINATION OF IRON OR CONCRETE BEAMS
LARGE SPANS
        The Bruner System is the only one in which large spans can be made without the use of iron or concrete beams. Because of the design, the construction carries itself and spans up to sixteen feet clear. The illustration on page 10 shows the appearance from the under side. Every beam, whether iron or concrete, takes up glass area and is detrimental to the illumination in that it eliminates glass. Every glass used transmits so much light, and the greatest amount of light is the result desired in sidewalk light construction.
LOADS
        The system is constructed so that it is capable of carrying a uniformly distributed load of 200 pounds or more per square foot, with factor of safety.
CONDENSATION
        One of the most objectionable features of the cast iron, part iron and concrete and concrete slab construction is entirely eliminated. Condensation and the attending annoyances are not known in the Bruner System.
DURABILITY         One of our strongest points, and surely an important one, in this construction, is the remarkable wearing the lasting qualities and the low cost of upkeep. The first cost is the final cost of the construction.