Building Construction
Auger boring

Is generally employed in cohesive and other self soils above water table
Is most economical up-to a depth of 5 meters
All of these
Is the most primitive method for making a hole in the ground

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Building Construction
Grillage foundation

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

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