Escalators: 30 degree incline is standard

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Escalators30 degree incline is standard
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Escalators

• An escalator is a conveyor transport device for
  transporting people, consisting of individual,
  linked steps that move up or down on tracks,
  which keep the treads horizontal.
• As a power-driven, continuous moving stairway
  designed to transport passengers up and down
  short vertical distances, escalators are used
  around the world to move pedestrian traffic in
  places where elevators would be impractical.
• Principal areas of usage include department
  stores, shopping malls, airports, transit
  systems, convention centers, hotels, and public
  buildings.

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Escalators

• The benefits of escalators are many. They have
  the capacity to move large numbers of people, and
  they can be placed in the same physical space as
  one might install a staircase. They have no
  waiting interval (except during very heavy
  traffic), they can be used to guide people toward
  main exits or special exhibits, and they may be
  weather-proofed for outdoor use.
• As recently as 2004, it was estimated that the
  United States had more than 30,000 escalators,
  and that 90 billion riders traveled on escalators
  each year.1

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• Escalators are one of the largest, most expensive
  machines people use on a regular basis, but also
  one of the simplest.

Escalators are one of the largest, most expensive
machines people use on a regular basis, but
they're also one of the simplest.
At its most basic level, an escalator is just a
simple variation on the conveyer belt. A pair of
rotating chain loops pull a series of stairs in a
constant cycle, moving a lot of people a short
distance at a good speed.
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how escalators work
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• Each step in the escalator has two sets of
  wheels, which roll along two separate tracks. The
  upper set (the wheels near the top of the step)
  are connected to the rotating chains, and so are
  pulled by the drive gear at the top of the
  escalator. The other set of wheels simply glides
  along its track, following behind the first set.

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• The tracks are spaced apart in such a way that
  each step will always remain level. At the top
  and bottom of the escalator, the tracks level off
  to a horizontal position, flattening the
  stairway. Each step has a series of grooves in
  it, so it will fit together with the steps behind
  it and in front of it during this flattening.

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individual steps
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handrails

• In addition to rotating the main chain loops, the
  electric motor in an escalator also moves the
  handrails. A handrail is simply a rubber conveyer
  belt that is looped around a series of wheels.
  This belt is precisely configured so that it
  moves at exactly the same speed as the steps, to
  give riders some stability.

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escalator speed

• Escalator speeds vary from about 90 feet per
  minute to 180 feet per minute (27 to 55 meters
  per minute). An escalator moving 145 feet (44 m)
  per minute can carry more than 10,000 people an
  hour -- many more people than a standard elevator.

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• Did your old house come "in the mail"? Between
  1906 and 1940, thousands of North American homes
  were built according to plans sold by mail order
  companies such as Sears and Montgomery Wards.
• Often the entire mail order house (in the form of
  labeled timbers) came via freight train.
• Other times, builders used local materials to
  construct homes according to the mail order
  catalog house plans.
• Catalog house plans by Sears, Montgomery Wards,
  Aladdin, and other companies were widely
  distributed in the United States and Canada.

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• How do you find Sears houses? It's not easy.
  Start your search with a reference work, such as
  "Houses by Mail A Guide to Houses from Sears,
  Roebuck and Company," or Dover Publishing's
  reprint of the 1926 Sears Modern Homes catalogue.
• Study front porches and roof lines. Original
  front porches can have several easy-to-spot
  clues. Look at the stick-work on the front porch
  columns and the interesting millwork on the
  3-part front porch columns.
• Note the small block of wood, centered on the
  front porch roof's trim. The roof line of the
  Sunbeam and Windsor extends much further on the
  front of the house than the back.

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The Sunbeam catalog house. Note the
interesting millwork on the porch of this Sunbeam
house in the catalog picture
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catalog houses
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• Sears Catalogue Homes - Between 1908 and 1940,
  Sears customers ordered over 75,000 houses from
  Sears Roebuck and Company mail-order catalogs.
  Prices for these build-it-yourself kit houses
  ranged from 600 to 6000.

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• The customer selected a house design from the
  Sears Modern Homes catalog. They received a bill
  of materials list and full blueprints. A few
  weeks after the order was placed, two boxcars
  containing approximately 30,000 pieces of house
  would arrive at the nearest train depot.

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• A 75-page instruction book told homeowners how to
  assemble those pieces. The best way to identify a
  Sears home is to obtain a copy of the original
  Houses By Mail catalogue.

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Millworkcasework, cabinetry, moldings, veneer
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molding shaped pieces (usually made of wood)
used as trim
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