Bruner Sidewalk Lights - 1911 Catalog - Page 13

GUARANTEE
        Every installation of the Bruner System is guaranteed to remain waterproof and in first-class condition two years, this clause being embodied in all contracts.
SPECIFICATION
        In taking the item of sidewalk lights into consideration, we would suggest that they be specified under a separate heading, using the first form where the system can be definitely named or the second form where for any reason the system cannot be referred to by name.
        If the words "or equal" are used, other constructions may be profitably advocated on this plea, and we again suggest that this wording be eliminated. Architects or owners can assure themselves beforehand that no advantage is allowed by the apparent lack of competition.
        (1) The vault lights shall be constructed according to the Bruner System. This glass shall not be less than 1 inch thick nor indented at the under side, but shall be solid and the full depth of the slab part of the construction. (In case of reflecting lights.) The prism shall be entirely below bottom of concrete slab. In this job the glass shall be plain No. 47, multiprism No. 52, or double-angle reflecting No. 46. The paving shall be guaranteed against leakage or any defects of workmanship and material.
        (2) The vault lights shall be constructed of reinforced concrete and no re-inforcing metal shall be exposed. The construction shall consist of a flat slab with ribs below 3½ inches deep between every row of glass in one direction. The glass shall be one inch thick and never less than full thickness of slab.