31.60.00 Special Foundations and Load-Bearing Elements
31.63.00 Bored Piles
31.63.13 Bored and Augered Test Piles 31.63.16 Auger Cast Grout Piles 31.63.19 Bored and Socketed Piles 31.63.19.13 Rock Sockets for Piles 31.63.23 Bored Concrete Piles 31.63.23.13 Bored and Belled Concrete Piles 31.63.23.16 Bored Friction Concrete Piles 31.63.26 Drilled Caissons 31.63.26.13 Fixed End Caisson Piles 31.63.26.16 Concrete Caissons for Marine Construction 31.63.29 Drilled Concrete Piers and Shafts 31.63.29.13 Uncased Drilled Concrete Piers 31.63.29.16 Cased Drilled Concrete Piers 31.63.33 Drilled Micropiles