(a) The lightest W12 section using Load and Resistance Factor Design (LRFD) method.

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Problem 2: Use the table below to compute the coordinates of the centroid of area shown below. y – 3 in.—|— 4 in. - -3 3 in. 3 in. x Area X X * Area y Y * Area Component (in²) (in) (in³) (in) (in³) Square 1 Rectangle 2 Triangle 3 Rectangle 4 Σ

Answer 1

Question

Chapter 6, Problem 6.8.1P

To determine

(a)

The lightest W12 section using Load and Resistance Factor Design (LRFD) method.

To determine

(b)

The lightest W12 section using Allowable Strength Design (ASD) method.

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Problem 2: Use the table below to compute the coordinates of the centroid of area shown below. y – 3 in.—|— 4 in. - -3 3 in. 3 in. x Area X X * Area y Y * Area Component (in²) (in) (in³) (in) (in³) Square 1 Rectangle 2 Triangle 3 Rectangle 4 Σ

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