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HOW MATERIALS HAVE INFLUENCED
The stone masonry of the Egyptians and Chinese
20 other sections not shown
activated sludge angles arch Bascule Bridges beam bottom brick building built caisson called cantilever carry caused cement chain chorobates civil engineers coffer-dam column concrete construction contour line contour map course cross hair curve dead load dioptra distance driven earth Eddystone Lighthouse edge Egyptians elevation entirely erection example exist feet floor force foundation girder Hero of Alexandria highway hill horizontal I-beam inches instrument known lake layer masonry material means measured ment method miles modern photograph piers piles pipe plane plate plumb bob portland cement pressure railroad rails reinforced river riveted road rock Roman sand sewage treatment shape shown in Figure sludge soil solid span spread footing stone straight stream structural steel surface surveying surveyor suspension bridges tanks telescope thick tion transit triangles truss truss bridge tunnel vertical Vitruvius walls weight wheel wire wood