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  2. List of United States pay television channels - Wikipedia

    en.wikipedia.org/wiki/List_of_United_States_pay...

    The date the channel first started broadcasting, not necessarily the date its founding company was created. OTA: If Yes, this channel has affiliations with free-to-air terrestrial networks. See also; List of United States over-the-air television networks. East/West [2] [3] [4] If Yes, this channel offers time-shifted feeds of its network. HD [2 ...

  3. C-SPAN - Wikipedia

    en.wikipedia.org/wiki/C-SPAN

    The C-SPAN network's core programming is live coverage of the U.S. House and Senate, with the C-SPAN channel emphasizing the United States House of Representatives. Between 1979 and May 2011, the network televised more than 24,246 hours of floor action. [ 9 ]

  4. Structural channel - Wikipedia

    en.wikipedia.org/wiki/Structural_channel

    The structural channel, C-channel or parallel flange channel (PFC), is a type of (usually structural steel) beam, used primarily in building construction and civil engineering. Its cross section consists of a wide "web", usually but not always oriented vertically, and two "flanges" at the top and bottom of the web, only sticking out on one side ...

  5. List of channel numbers assigned to FM frequencies in North ...

    en.wikipedia.org/wiki/List_of_channel_numbers...

    FM channel numbers are most commonly used for internal regulatory purposes. The range originally adopted in 1945 began with channel 201 (88.1 MHz), or a value high enough to avoid confusion with television channel numbers, [2] which over the years have had values ranging from 1 to 83. Having a gap between the highest TV channel number and the ...

  6. Span (engineering) - Wikipedia

    en.wikipedia.org/wiki/Span_(engineering)

    In engineering, span is the distance between two adjacent structural supports (e.g., two piers) of a structural member (e.g., a beam). Span is measured in the horizontal direction either between the faces of the supports (clear span) or between the centers of the bearing surfaces (effective span): [1] A span can be closed by a solid beam or by ...

  7. Digital Signal 1 - Wikipedia

    en.wikipedia.org/wiki/Digital_Signal_1

    Digital Signal 1 (DS1, sometimes DS-1) is a T-carrier signaling scheme devised by Bell Labs. [1] DS1 is the primary digital telephone standard used in the United States, Canada and Japan and is able to transmit up to 24 multiplexed voice and data calls over telephone lines.

  8. List of WLAN channels - Wikipedia

    en.wikipedia.org/wiki/List_of_WLAN_channels

    Wireless LAN (WLAN) channels are frequently accessed using IEEE 802.11 protocols. The 802.11 standard provides several radio frequency bands for use in Wi-Fi communications, each divided into a multitude of channels numbered at 5 MHz spacing (except in the 45/60 GHz band, where they are 0.54/1.08/2.16 GHz apart) between the centre frequency of the channel.

  9. Structural steel - Wikipedia

    en.wikipedia.org/wiki/Structural_steel

    Steel never turns into a liquid below this temperature. Pure Iron ('Steel' with 0% Carbon) starts to melt at 1,492 °C (2,718 °F), and is completely liquid upon reaching 1,539 °C (2,802 °F). Steel with 2.1% Carbon by weight begins melting at 1,130 °C (2,070 °F), and is completely molten upon reaching 1,315 °C (2,399 °F).