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  2. French catheter scale - Wikipedia

    en.wikipedia.org/wiki/French_catheter_scale

    The French scale measures the outer diameter of the catheter, not the size of the internal drainage channel (inner diameter). For instance, a two-way catheter of 20 Fr and a three-way catheter of 20 Fr have the same outer diameter, but the three-way catheter has an additional channel for irrigation, reducing the size of its drainage channel.

  3. 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 ...

  4. Strut channel - Wikipedia

    en.wikipedia.org/wiki/Strut_channel

    Cross section diagram of standard strut channel. Basic strut channel comes in the open box section 1 + 5 ⁄ 8 in (41 mm) square. A half height 1 + 5 ⁄ 8 in × 13 ⁄ 16 in (41 mm × 21 mm) version is also available, used mostly where mounted directly to a wall as it has significantly less stiffness and ability to carry loads across an open space or brace.

  5. Section modulus - Wikipedia

    en.wikipedia.org/wiki/Section_modulus

    A C is the area in compression A T is the area in tension y C, y T are the distances from the PNA to their centroids. Plastic section modulus and elastic section modulus can be related by a shape factor k: = = This is an indication of a section's capacity beyond the yield strength of material.

  6. Hardness comparison - Wikipedia

    en.wikipedia.org/wiki/Hardness_comparison

    Although it is impossible in many cases to give an exact conversion, ... (10 mm Ball, 3000 kg load) Vickers HV (5 kg) Rockwell C HRC (120 degree cone 150 kg)

  7. 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).