PDF-50STONE ARCH BRIDGES IN MARYLAND Although no datable seventeenth or

51 52 Between 1811 and 1825 the federally built National Road also was constructed through Maryland between Cumberland and Uniontown Pennsylvania This landmark early federal public works project i. How Bridges Are Engineered To Withstand Weight, While Being Durable,. And In Some Cases Aesthetically Pleasing. Institute Of Electrical And Electronics Engineers, Phoenix Section. ARIZONA SCIENCE LAB®. Bridges. Bridges . A bridge is a structure built to span physical obstacles such as a body of water, valley, or road, for the purpose of providing passage over the obstacle. (Wikipedia). Bridge – design influences. Suspension Bridges. A suspension bridge is a type of bridge which is built by suspending the roadway from cables attached to a master cable which runs above the length of the bridge. . They are strong and lightweight. We build different bridges for different needs. . Covered Bridge. Covered Bridges. In the 18. th. and 19. th. century many bridges were covered. Covered Bridges. Why do you think these bridges were covered?. General Description. A bridge is a structure built to cross a valley, road, railroad track, river, body of water, or any other physical obstacle, for the purpose of providing passage over an obstacle.. By . James Hurley&. Lee Byrne . 4th Class. Seomra 13. What are Bridges?. Why do we Use bridges?. Bridges are built over roads, railway lines, vallies,bays, ravines and rivers . We use bridges to connect one place to the other.. HUMANS . THROUGH THE . AGES. Daria. . Prikhodko. 627 gr. .. TYPES OF BRIDGES. BEAM BRIDGE. CANTILEVER BRIDGE. ARCH BRIDGE. SUSPENSION BRIDGE. CABLE-STAYED BRIDGE. MOVABLE BRIDGE. DOUBLE-DECKED BRIDGE. The first bridges were nature-made: trees that fell across creeks or rivers.. The first man-made bridges were most likely made from trees lashed, stones, or vines.. HISTORY. Designed amazing arch bridges and viaducts that could withstand nearly anything when other bridges continued to fail. . . One of the 3 main kinds of bridge is a . beam bridge. . A beam bridge is made by having a long beam lay across a space to connect two places. The beam is a flat piece of wood, metal, or concrete that gives people a way to walk or ride across. Under the beams are tall poles or posts, called piers, that help to hold up the beams. Beam bridges are the most simple kind of. A⁣潭灡r楳潮⁢e瑷een⁴桥⁍䕘䔠a湤 偩灰ar撩se瑨潤猠潦⁡獳e獳楮朠瑨e潡d Wa湧ⰠJ,⁈a祮es,⁂J⁡湤⁍e汢潵r湥ⰠC 呩瑬e A⁣潭灡ris潮⁢etween⁴桥⁍EXE⁡ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 5 Bridges and Structures AM - STR - 06002 June 2014 Asset Management & Maintenance Standards AM TRANSPORT INFRASTRUCTURE IRELAND (TII) PUBLICATIONS About TII Transport Infrastructure )r•land(4))) AreeenaarseeedWaJaesJerCeArisetweenEXEiax0027setassessildaacitasiesAuthsWaHaeselpeAicleURLTseisilaettt//isalcPublishede13USsitallectiteseahttitySalWreititslleaterialelinesitysaelyilaeiaeawdiedmeialtet AQUEDUCTS . & CANAL VIADUCTS . THROUGH ARCH. . BRIDGE. TIED ARCH. . BRIDGE. DECK ARCH. . BRIDGE. CORBEL ARCH. . BRIDGE. Here are the different styles of arch bridges:. ARCH. Tension and Compression forces .