Building Construction
The type of ashlar masonry in which stones are finely chisel dressed and thickness of joints does not exceed 3 mm, is

Ashlar facing masonry
Chamfered ashlar masonry
Random coursed ashlar masonry
Coursed ashlar masonry

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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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