Gulf Coast Lumber is an international supplier of pressure treated pilings and timber for bridges, boathouses, beach homes, bulkheads, docks, and piers, with locations in Houston, Texas and Costa Rica. Our marine piling is available treated in CCA at 2.50 pounds per cubic foot or Creosote at 20 pcf for use in salt and brackish water Jun 29, 2021 · It may be a good idea to rent a concrete mixer for this project. 6. Pour 10 in (25 cm) of concrete into the pipe, then insert the post. Lower the post into the PVC pipe and push it down into the concrete. By pouring concrete into the pipe first, the post will be more stable when you put it into place.Piling and drilling for house foundations - new builds, renovations, and extensions. Range of drilling and piling equipment to provide concrete, timber or steel piles. Providing residential andmercial serviceuding Kapiti, Paraparaumu, Raumati, Paekakariki and Otaki. 021 277 7770.Sep 08, 2019 · Joined Jul 4, 2018. 5,504 Posts. #2 · Aug 31, 2019 (Edited) I would go with an auger in a 1/2" heavy duty electric drill. with a slow RPM and high torque. a cordless drill is not the one to use for this project. I have made a LOT of wood signs using 6x6" P/T posts for the. National Park Service and their code calls for 3 or 4 holes drilled 8".