Where once workers had to bend awkwardly to hold and whack headliners into place on the car's ceiling, a headliner now has sewn-in magnets that keep it in place on the roof's metal frame.

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Or the roof an A-frame house?

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The new Corvette, for instance, incorporates lightweight materials to a degree not seen on even the most exotic cars, including a carbon fiber hood and removable roof panel, and a carbon-reinforced aluminum frame.

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Four cranes lifted the roof into place on top of the structure's frame.

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He pointed to a gray frame house, an ordinary two-story, with a shingled roof and no sign of the fallen grace that defined some of the houses elsewhere in town.

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We lived in the second-floor flat of a small two-and-a-half-family house on a tree-lined street of frame wooden houses with redbrick stoops, each stoop topped with a gable roof and fronted by a tiny yard boxed in with a low-cut hedge.

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Yet the car's body is 25% stiffer than its predecessor because key parts of the frame--like the center post that supports the car body during side collisions and the roof side rail that connects the sides of the roof--are made of ultra-high-strength steel created through a process called hot stamping.

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