Agencie is the design-builder for the gut renovation and four-story addition to a historic brownstone in Jersey City. The landmarked townhouse dates back to the 1830s and stands in Paulus Hook, an area that the Hudson River had previously submerged. The geotechnical report, produced by SESI Engineers with soil borings obtained by Environmental Management Consultants, revealed the sub-soil to consist primarily of mushy sand!
To achieve load-bearing capacity for the addition, Agencie selected Helical Piers by Chance. Helical piers have been around since the 1800s and are long shafts at the end of which you’ll find helix plates 8-14″ in diameter. These were drilled down to a suitable soil stratum, about 22′ below grade, to achieve a factored working load of 40,000 lbs. Shore Systems LLC completed the work in one day.