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2. List of unusual units of measurement - Wikipedia

   en.wikipedia.org/wiki/List_of_unusual_units_of...

   A roof's area may be calculated in square feet, ... For planed lumber the dimensions used to calculate board feet are ... One ton of refrigeration is exactly equal to ...

3. Hoppus - Wikipedia

   en.wikipedia.org/wiki/Hoppus

   This volume measurement was developed to estimate what volume of a round log would be usable timber after processing, in effect attempting to ‘square’ the log and allow for waste. The hoppus ton (HT) was also a traditionally used unit of volume in British forestry. One hoppus ton is equal to 50 hoppus feet or 1.8027 cubic meters.

4. Square (unit) - Wikipedia

   en.wikipedia.org/wiki/Square_(unit)

   The square is an Imperial unit of area that is used in the construction industry in the United States and Canada, [1] and was historically used in Australia. One square is equal to 100 square feet. Examples where the unit is used are roofing shingles, metal roofing, vinyl siding, and fibercement siding products.

5. Ton - Wikipedia

   en.wikipedia.org/wiki/Ton

   For practical purposes the displacement ton (DT) is a unit of volume, 35 cubic feet (0.9911 m 3), the approximate volume occupied by one ton of seawater (the actual volume varies with salinity and temperature). [16] It is slightly less than the 224 imperial gallons (1.018 m 3) of the water ton (based on distilled water).

6. Short ton - Wikipedia

   en.wikipedia.org/wiki/Short_ton

   The short ton (abbreviation tn [1]) is a measurement unit equal to 2,000 pounds (907.18 kg). It is commonly used in the United States , where it is known simply as a ton; [ 1 ] however, the term is ambiguous, the single word " ton " being variously used for short, long , and metric tons.

7. Reflective surfaces (climate engineering) - Wikipedia

   en.wikipedia.org/wiki/Reflective_surfaces...

   The program began in 2009 as part of PlaNYC, [69] and has coated over 5 million square feet of NYC rooftops white. [70] On Wednesday, September 25, 2013 Mayor Michael R Bloomberg declared it "NYC °CoolRoofs Day" in New York City with the coating of its 500th building and reducing the carbon footprint by over 2000 tons.