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  2. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    bolt circle: BCD or B.C.D. bolt circle diameter: BHC bolt hole circle Same definition as the bolt circle diameter BHCS: button head cap screw: Like an SHCS but with a button head. BHN: Brinell hardness number: BoM or BOM: bill of materials: Also called a list of materials (LM or L/M). Overlaps a lot in concept with a parts list (PL or P/L ...

  3. Bolt circle - Wikipedia

    en.wikipedia.org/wiki/Bolt_circle

    A bolt circle with four wheel nuts on an Acura. The mounting pattern of most car rims are described using bolt patterns, and this pattern is one of many factors which determine whether a rim will fit a given car. Here, the bolt circle indicates the number of wheel nuts and associated hub bolts (or alternatively just wheel bolts). [5] [6]

  4. Concrete block - Wikipedia

    en.wikipedia.org/wiki/Concrete_block

    A pallet of "8-inch" concrete blocks An interior wall of painted concrete blocks Concrete masonry blocks A building constructed with concrete masonry blocks. A concrete block, also known as a cinder block in North American English, breeze block in British English, or concrete masonry unit (CMU), or by various other terms, is a standard-size rectangular block used in building construction.

  5. Autoclaved aerated concrete - Wikipedia

    en.wikipedia.org/wiki/Autoclaved_aerated_concrete

    Palette stacked autoclaved aerated concrete blocks. Autoclaved aerated concrete (AAC) is a lightweight, prefabricated concrete building material. Developed initially in the mid-1920s, it has expanded into widespread use. [citation needed] It is most suitable for producing a lightweight or most cost-effective alternative to traditional concrete ...

  6. Anchor channel - Wikipedia

    en.wikipedia.org/wiki/Anchor_channel

    The channels are supplied with foam filler to prevent concrete from leaking into the channel when the concrete is poured. The system includes T-shaped bolts which are called T-bolts or channel bolts in the regulations. They are also called hammer head bolts, serrated bolts or hook-headed bolts based on their shape and function.

  7. Anchor bolt - Wikipedia

    en.wikipedia.org/wiki/Anchor_bolt

    Anchor bolts transfer different types of load: tension forces and shear forces. [3] A connection between structural elements can be represented by steel columns attached to a reinforced concrete foundation. [4] A common case of a non-structural element attached to a structural one is the connection between a facade system and a reinforced ...

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    mail.aol.com

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  9. List of screw and bolt types - Wikipedia

    en.wikipedia.org/wiki/List_of_screw_and_bolt_types

    A special type of bolt that is set into concrete, with screw threads protruding above the concrete surface to accept a nut. breakaway bolt: A breakaway bolt is a bolt with a hollow threaded shank, which is designed to break away upon impact. Typically used to fasten fire hydrants, so they will break away when hit by a car. Also used in aircraft ...