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<br />Lesson 1 <br /> <br />Introduction. Participant Workbook <br /> <br />B. <br /> <br />Culvert Shapes and Materials <br /> <br />TYPES OF CULVERTS <br /> <br />CULVERT SHAPES <br /> <br />. SHAPES <br />. MATERIALS <br /> <br />- <br /> <br />.- <br />~ <br /> <br /> <br />1.3 Types of Culverts <br /> <br />1.4 Culvert Shapes <br /> <br />. Circular <br />. Oval (elliptical) <br />. Pipe arch and high and low profile arch <br /> <br />CULVERT MATERIALS <br /> <br />. METAL (STEEL, STRUCTURAL PLATE, <br />OR ALUMINUM) <br />. CONCRETE (CAST-IN.PLACE OR <br />PRECAST) <br />. PLASTIC <br />. SELECTION DEPENDS ON STRENGTH, <br />ROUGHNESS, DURABILITY, & ABRASION <br /> <br />1.5 Culvert Materials <br /> <br />Culvert Materials <br /> <br />. Concrete box culverts are either cast-in-place or precast <br />. Metal box culverts are viable alternatives in some cases <br />. Pipe culverts of metal, concrete or plastics are either fabricated in a plant or <br />assembled in the field from various components <br />. Selection of material type depends on strength, roughness, durability and <br />abrasion factors <br /> <br />1-4 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />