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  2. List of tallest structures in the United States by height

    en.wikipedia.org/wiki/List_of_tallest_structures...

    Pinnacle Towers Mount Selman: Mount Selman, Texas: Guyed Mast 446.8 m KMSP TV Tower: Shoreview, Minnesota: Guyed Mast 446.7 m Media General Operations Tower Youngstown: Mount Selman, Texas: Guyed Mast 446.5 m KLKN TV-Tower: Utica, Nebraska: Guyed Mast 446 m WCES TV Tower: Wrens, Georgia: Guyed Mast 445.9 m New World Communications Tower ...

  3. Box crib - Wikipedia

    en.wikipedia.org/wiki/Box_crib

    Cribbing is usually accomplished with blocks of wood, often 4×4 (3 + 1 ⁄ 2 in or 89 mm) or 6×6 (5 + 1 ⁄ 2 in or 140 mm) and 18–24 in (460–610 mm) long.Soft woods, like spruce and pine, are often preferred because they crack slowly and make loud noises before completely failing, whereas stiffer woods may fail explosively and without warning.

  4. List of tallest freestanding structures - Wikipedia

    en.wikipedia.org/wiki/List_of_tallest...

    This is a list of tallest freestanding structures in the world past and present. To be freestanding a structure must not be supported by guy wires , the sea or other types of auxiliary support. It therefore does not include guyed masts , partially guyed towers and drilling platforms but does include towers , skyscrapers ( pinnacle height) and ...

  5. Column - Wikipedia

    en.wikipedia.org/wiki/Column

    A reinforced concrete column is extended by having the steel reinforcing bars protrude a few inches or feet above the top of the concrete, then placing the next level of reinforcing bars to overlap, and pouring the concrete of the next level. A steel column is extended by welding or bolting splice plates on the flanges and webs or walls of the ...

  6. Precast concrete - Wikipedia

    en.wikipedia.org/wiki/Precast_concrete

    A precast concrete walled house under construction An example of low-quality precast concrete with exposed dowels, connectors, indications of cracks, and malformations, even during its installation, Barangay Lantic, Carmona, Cavite, Philippines Interior view of the walls, supports, and roof of a precast commercial shop in Williston, North Dakota, US.

  7. Fort Eisenhower in Georgia gives 'all clear' after shooting ...

    www.aol.com/news/fort-eisenhower-georgia-gives...

    The identity of the victim will not be released until next-of-kin is reached. Shortly after 9 a.m., the Army base, formerly known as Fort Gordon, issued a lockdown and echoed that message through ...