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  2. Lifting stone - Wikipedia

    en.wikipedia.org/wiki/Lifting_stone

    Lifting a stone at Harri-jasotzaileak event in the Basque Country. Lifting stones are heavy natural stones which people are challenged to lift, proving their strength. They are common throughout Northern Europe, particularly Iceland (where they are referred to as steintökin), Ireland, Scotland, Basque Country, Faroe Islands, Wales, North West England centered around Cumbria, Switzerland ...

  3. Djúpalónssandur - Wikipedia

    en.wikipedia.org/wiki/Djúpalónssandur

    Djúpalónssandur Lifting stones in Djúpalónsandur in Iceland, weighing from top to bottom 23, 54, 100, and 154 kg.. Djúpalónssandur (Icelandic pronunciation: [ˈtjuːpaˌlounsˌsantʏr̥]) is a sandy beach and bay on foot of Snæfellsjökull in Iceland.

  4. Van der Meer formula - Wikipedia

    en.wikipedia.org/wiki/Van_der_Meer_formula

    Δ = relative density of the stone (= (ρ s-ρ w)/ρ w) where ρ s is the density of the stone and ρ w is the density of the water d n50 = nominal stone diameter α = breakwater slope P = notional permeability S = Damage number N = number of waves in the storm ξ m = the Iribarren number calculated with the Tm

  5. Stone (unit) - Wikipedia

    en.wikipedia.org/wiki/Stone_(unit)

    The stone remains widely used in the United Kingdom and Ireland for human body weight: in those countries people may commonly be said to weigh, e.g., "11 stone 4" (11 stones and 4 pounds), rather than "72 kilograms" as in most of the other countries, or "158 pounds", the conventional way of expressing the same weight in the US and in Canada. [38]

  6. Armourstone - Wikipedia

    en.wikipedia.org/wiki/Armourstone

    Armourstone is a generic term for broken stone with stone masses between 100 and 10,000 kilograms (220 and 22,050 lb) (very coarse aggregate) that is suitable for use in hydraulic engineering. Dimensions and characteristics for armourstone are laid down in European Standard EN13383. [ 1 ]

  7. Decomposed granite - Wikipedia

    en.wikipedia.org/wiki/Decomposed_granite

    Decomposed granite, as a crushed stone form, is used as a pavement building material. It is used on driveways, garden walkways, bocce courts and pétanque terrains, and urban, regional, and national park walkways and heavy-use paths. DG can be installed and compacted to meet handicapped accessibility specifications and criteria, such as the ADA ...

  8. Ardblair Stones - Wikipedia

    en.wikipedia.org/wiki/Ardblair_Stones

    The Ardblair Stones is a strength feat, where nine reinforced concrete lifting stones of ascending weight are used. [ 1 ] [ 2 ] The 9 stones weigh 18 kg (40 lb), 32 kg (71 lb), 41 kg (90 lb), 50 kg (110 lb), 75 kg (165 lb), 107 kg (236 lb), 118 kg (260 lb), 135 kg (298 lb) and 152 kg (335 lb) respectively. [ 3 ]

  9. Hudson's equation - Wikipedia

    en.wikipedia.org/wiki/Hudson's_equation

    Hudson's equation, also known as Hudson formula, is an equation used by coastal engineers to calculate the minimum size of riprap (armourstone) required to provide satisfactory stability characteristics for rubble structures such as breakwaters under attack from storm wave conditions.