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The prototype is for a 4' mini ramp with deck. Each section is 8' wide and has one transition. Four such sections, welded together, would make a 16' wide mini ramp with 10' flat-bottom. The prototype drawing could be modified to make a spine ramp or to add bowl corners. The prototype could also be modified to make a taller mini ramp or vert ramp.
A bailey or ward in a fortification is a leveled courtyard, typically enclosed by a curtain wall.In particular, a medieval type of European castle is known as a motte-and-bailey.
This was a strip of clear ground immediately adjacent the wall. The word is from the late medieval, derived from the classical Latin post murum ("behind the wall"). An external pomoerium, stripped of bushes and building, gave defenders a clear view of what was happening outside and an unobstructed field of shot.
Animation showing the operation of a drawbridge. A drawbridge or draw-bridge is a type of moveable bridge typically at the entrance to a castle or tower surrounded by a moat.In some forms of English, including American English, the word drawbridge commonly refers to all types of moveable bridges, such as bascule bridges, vertical-lift bridges and swing bridges, but this article concerns the ...
Deck designs can be found in numerous books, do-it-yourself magazines, and websites, and from the USDA. [8] Typical construction is either of a post and beam architecture, or a cantilever construction. The post-and-beam construction relies on posts anchored to piers in the ground.
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This historical reconstruction of an 1832 civilian fort from the Black Hawk War, in Illinois, featured a stockade with a blockhouse. A stockade is an enclosure of palisades and tall walls, made of logs placed side by side vertically, with the tops sharpened as a defensive wall .
A bastion fort or trace italienne (a phrase derived from non-standard French, meaning 'Italian outline') is a fortification in a style developed during the early modern period in response to the ascendancy of gunpowder weapons such as cannon, which rendered earlier medieval approaches to fortification obsolete.