A thoroughly practical construction, which is guaranteed to be water-tight and free from shaling of glass.

Simplex construction is double reinforced, and the steel used in it is entirely protected by the concrete, and is thus immune from corrosion.

The glass used in Simplex is covered with a patented malleable coating, which takes care of any expansion of the steel or concrete, and absolutely prevents shaling of the glass, which occurs in all other constructions, and which was impossible to overcome until Simplex was placed on the market.

This is the only sidewalk construction that does not require experts to set, the most important part of the work being done at our factory. When the pre-formed slab is placed over the opening, the glass is set in place, and the balance of the cement put on by an ordinary cement mechanic.

Simplex system of skylights consists of a pre-formed factory-made slab of reinforced concrete, insuring the proper spacing and placing of reinforcement. Pre-formed slab is 1¼ in. in thickness, with heavy I-beam reinforcement one way and twisted steel rods in the other direction, which is sufficient in itself to carry heavy loads. The finished work, being 2¼ in. thick, is to constructed that the glass, which measures 6 in. × 6 in., fits true and straight, making it impossible to set lenses out of perfect alignment.

Skylights, Sidewalk Lights, Floor Lights, shall be of double-reinforced concrete construction, with factory-made pre-formed slabs, having heavy I-beam tension members one way, with transverse reinforcement of twisted steel rods, using No. … Tanex quality annealed glass, with cushion of malleable coating. All work to be guaranteed against defective workmanship and material, maintained water-tight, and glass guaranteed against breakage from expansion or contraction for a period of two years.

We will be pleased to furnish, on application, full size detail drawings of the various construction which we manufacture. See also page 195.