Rigid culverts are generally made from steel or aluminum.

Rigid culverts are generally made from steel or aluminum.

• A. N/A
• B. False
• C. True
• D. Not sure

Answer: (B)

Rigid culverts rely on the stiffness of the culvert material itself to carry loads with minimal deformation. They are typically made from reinforced concrete (such as concrete box or slab culverts, poured-in-place or precast) because concrete provides high rigidity and durability. Steel or aluminum culverts exist, but they are generally considered flexible or thin-walled types that deform under load and rely more on surrounding soil and the shell’s geometry for strength. So the statement that rigid culverts are generally made from steel or aluminum is not correct; the usual material is concrete.

Rigid culverts rely on the stiffness of the culvert material itself to carry loads with minimal deformation. They are typically made from reinforced concrete (such as concrete box or slab culverts, poured-in-place or precast) because concrete provides high rigidity and durability. Steel or aluminum culverts exist, but they are generally considered flexible or thin-walled types that deform under load and rely more on surrounding soil and the shell’s geometry for strength. So the statement that rigid culverts are generally made from steel or aluminum is not correct; the usual material is concrete.