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2. Railroad tie - Wikipedia

   en.wikipedia.org/wiki/Railroad_tie

   The crosstie spacing of mainline railroad is approximately 19 to 19.5 inches (48 to 50 cm) for wood ties or 24 inches (61 cm) for concrete ties. The number of ties is 3,250 wooden crossties per mile (2,019 ties/km, or 40 ties per 65 feet) for wood ties or 2,640 ties per mile for concrete ties. [3] [42] [43]

3. Stere - Wikipedia

   en.wikipedia.org/wiki/Stere

   The correspondence between stere and cubic meters of stacked wood is imprecise because it depends on the length of the logs used and on how irregular they are. The stere corresponds to 1 m 3 (35.3 cu ft) of wood, made exclusively with logs of 1 m (3.3 ft) in length, all stacked parallel and neatly arranged. If the logs are less than 1 m, the ...

4. Time–distance diagram - Wikipedia

   en.wikipedia.org/wiki/Time–distance_diagram

   A time–distance diagram is a chart with two axes: one for time, the other for location. The units on either axis depend on the type of project: time can be expressed in minutes (for overnight construction of railroad modification projects such as the installation of switches) or years (for large construction projects); the location can be (kilo)meters, or other distinct units (such as ...

5. Cord (unit) - Wikipedia

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

   A cord of wood. The cord is a unit of measure of dry volume used to measure firewood and pulpwood in the United States and Canada.. A cord is the amount of wood that, when "racked and well stowed" (arranged so pieces are aligned, parallel, touching, and compact), occupies a volume of 128 cubic feet (3.62 m 3). [1]

6. Lumber - Wikipedia

   en.wikipedia.org/wiki/Lumber

   1 × 5: 3 ⁄ 4 × 4 + 1 ⁄ 2: 19 × 114 ... Properly preservative-treated wood can have 5 to 10 times the service life of untreated wood. Preserved wood is used ...

7. Flitch beam - Wikipedia

   en.wikipedia.org/wiki/Flitch_beam

   Engineered lumber can be cut to length and installed much like sawn lumber; the flitch requires shop fabrication and/or field bolting. This, coupled with a much increased self-weight of the beam (11.4 pounds (5.2 kg) for engineered wood vs. 25.2 pounds (11.4 kg) for a flitch beam), decreases the viability of the system.