An existing single family residence in Ft. Lauderdale, FL underwent a construction project to renovate the swimming pool and pool deck area of the home. The original structure, located on the Intracoastal Waterway, was built at grade level due to the near-surface water table at the site. The renovation project included plans to replace the existing wood deck with a new stone deck and shade structure. Deep foundations were proposed to support both the shade structure and deck, transferring the loads to deeper competent soils and reducing the potential for differential movements. The limited site access and the small work area prevented use of large equipment. Helical piles were initially considered for the project, but due to the extreme limited access and relatively light loads, pin piles were chosen as the most cost effective deep foundation option.
N-Square, Inc. dba Innovative Marine Construction Company, installed seventy-eight (78) Foundation Supportworks™ Model 288 Pin Piles to support the new concrete grade beams and new structural deck. The pin pile design consisted of a 2-7/8 inch O.D. pile shaft, driven to refusal with a specified hammer to support a design load of 5 tons. Pile caps were attached at the top of each pile to be cast into the structural concrete. The pin piles were driven to refusal with depths ranging from 12 to 22 feet. The installation of all 78 piles took less than four days to complete and the project was able to continue on schedule.