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It was not until 1880 that an era of construction based on reliable mild steel began. By that date the quality of steels being produced had become reasonably consistent. The Home Insurance Building, completed in 1885, was the first to use skeleton frame construction, relying on its masonry cladding for stability.

Wrought iron was actually "wrought" (i.e. worked or hammered) into bars and has been used as a construction material for thousands of years. Most metals used for construction purposes are alloys. For example, steel is an alloy with iron and carbon being the primary elements.

An average commercial steel building costs between $16 and $20 per square foot, including building package (I-Beams, purlins, girts etc.) , delivery, foundation and the cost of construction.

The frames and glass of storm doors can come in many different styles, all which let in different levels of light. Full view storm doors have an entire panel of glass in the door, mid-view storm doors are comprised of three-quarters glass, and high view storm doors have glass in the upper half. Glass can be clear, decorative, or Low E. If you need

A temperature of 3 to 4°C on average is preferred, with upper and lower limits of 0 to 7°C. At 7°C food will deteriorate more quickly.