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Pole building design was pioneered in the 1930s in the United States originally using utility poles for horse barns and agricultural buildings. The depressed value of agricultural products in the 1920s, and 1930s and the emergence of large, corporate farming in the 1930s, created a demand for larger, cheaper agricultural buildings. [2]
By the Late Middle Ages even infantry could afford to wear several pieces of plate armour. Armour production was a profitable and pervasive industry during the Middle Ages and the Renaissance. [18] Royal Armoury of Madrid, Spain. A complete suit of plate armour made from well-tempered steel would weigh around 15–25 kg (33–55 lb). [19]
Forearm guard. May be solid metal or splints of metal attached to a leather backing. Bracers made of leather were most commonly worn by archers to protect against snapping bowstrings. Developed in antiquity but named in the 14th century. 'Vambrace' may also sometimes refer to parts of armour that together cover the lower and upper arms. Gauntlet
The lorica segmentata (Latin pronunciation: [ɫoːˈriːka]), also called lorica lamminata, or banded armour is a type of personal armour that was used by soldiers of the Roman army, consisting of metal strips fashioned into circular bands, fastened to internal leather straps.
A manica (Latin:; Latin for 'sleeve'; [1] Ancient Greek: χεῖρες, romanized: kheîres, lit. 'sleeves') was a type of iron or copper-alloy laminated arm guard with curved, overlapping metal segments or plates fastened to leather straps worn by ancient and late antique heavy cavalry, infantry, and gladiators.
Western Xia mail armour. Armour (Commonwealth English) or armor (American English; see spelling differences) is a covering used to protect an object, individual, or vehicle from physical injury or damage, especially direct contact weapons or projectiles during combat, or from a potentially dangerous environment or activity (e.g. cycling, construction sites, etc.).
MIL-DTL-46100E specifies a steel of identical hardness. [3] MIL-DTL-32332 specifies ultra-hard steel, with Brinell hardness in excess of 570. [3] A Chinese publication lists 30MnCrNiMo "685" steel as the material used in Chinese rolled armor plates, with a Brinell Hardness of HBW 444-514 (thin) / 429-495 (thick).
Rolling also elongates the grain structure in the steel to form long lines, which enable the stress the steel is placed under when loaded to flow throughout the metal, and not be concentrated in one area. [6] Cast homogenous armour or cast steel armour is produced by directly casting steel into the desired shape. [7]