| 1. | Unlike regular arches, jack arches are not semicircular in form.
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| 2. | This jack arch was removed and the facade restored to its uniform appearance.
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| 3. | All of the double-hung sash windows have stuccoed jack arch lintels.
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| 4. | Once the columns were in place, a jack arch was constructed above them.
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| 5. | There is considerable scope for incorporation of decorative patterns and elements into jack arches.
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| 6. | The roof is jack arch type on iron girders with brick and lime concrete.
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| 7. | It has a side gable roof and tall jack arch door and window openings.
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| 8. | The fa�ade is three bays wide, with each door and window topped with a jack arch.
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| 9. | The rectangular windows are unusually large and are capped by pressed brick jack arches with stone console keystones.
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| 10. | The latter are classical in style and serve as the keystones in the jack arches above the windows.
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