Building Construction
Mansard roof is a roof which slopes in

Four directions with break in the slope on each side
Two directions with break in the slope on each side
Two directions without break in the slope on each side
Four directions without break in the slope on each side

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Building Construction
Grillage foundation

All listed here
Is used to transfer heavy structural loads from steel columns to a soil having low bearing capacity
Does not require deep cutting as the required base area with required pressure intensity is obtained at a shallow depth
Is light and economical

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