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The Ordnance ML 3-inch mortar was the United Kingdom's standard mortar used by the British Army from the early 1930s to the late 1960s, superseding the Stokes mortar. Initially handicapped by its short range compared to similar Second World War mortars, improvements of the propellant charges enabled it to be used with great satisfaction by ...
Glulam brace with plates used for connections Glulam frame of a roof structure. Glued laminated timber, commonly referred to as glulam, is a type of structural engineered wood product constituted by layers of dimensional lumber bonded together with durable, moisture-resistant structural adhesives so that all of the grain runs parallel to the longitudinal axis.
Timber-framed structures differ from conventional wood-framed buildings in several ways. Timber framing uses fewer, larger wooden members, commonly timbers in the range of 15 to 30 cm (6 to 12 in), while common wood framing uses many more timbers with dimensions usually in the 5- to 25-cm (2- to 10-in) range.
Studs usually consist of 1 + 1 ⁄ 2-by-3 + 1 ⁄ 2-inch (38 mm × 89 mm) or 1 + 1 ⁄ 2-by-5 + 1 ⁄ 2-inch (38 mm × 140 mm) lumber and are commonly spaced at 16 inches (410 mm) on center. This spacing may be changed to 12 or 24 inches (300 or 610 mm) on center depending on the load and the limitations imposed by the type and thickness of the ...
2 inch Medium Trench Mortar/2-inch Howitzer United Kingdom: World War I: 48 52 SBML 2-Inch United Kingdom: World War II: 4.8 58.3 Mortier de 58 mm type 2 "Crapouillot" [4] France: World War I: 301 60 Granatenwerfer 16 German Empire: World War I: 88 60 60 COM 97 Finland: Modern 16.8 [3] 60 Brandt Mle 1935 France: World War II: 19.05 60 M2 United ...
The mortise and tenon joint is an ancient joint. One of the earliest mortise-tenon structure examples dates back 7,000 years to the Hemudu culture in China's Zhejiang Province. [3] Tusked joints were found in a well near Leipzig, [4] created by early Neolithic Linear Pottery culture, and used in construction of the wooden lining of the wells. [5]
The Stokes mortar was a simple weapon, consisting of a smoothbore metal tube fixed to a base plate (to absorb recoil) with a lightweight bipod mount. When a mortar bomb was dropped into the tube, an impact sensitive primer in the base of the bomb would make contact with a firing pin at the base of the tube, and ignite the propellant charge in the base, launching the bomb towards the target.
In 1914, Commandant Duchêne of the Engineers (of the 33rd Corps belonging to X Army) began experimenting with a simple improvised tube mortar made from discarded Canon de 75 mle 1897 cases at the end of a pole. He found he was able to build a simple high-explosive fragmentation projectile that could be used as an anti-personnel weapon and to ...
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