b'Graph 3. EstimatingPierSpacingBasedUponFoundationStrengthofSpreadFooting with Short Integrally Cast Concrete Stem Walls60"STEMWALLHEIGHTPLUS54" FOOTINGHEIGHT48" 2 (MINIMUM)6,000 lb/ft#4 REBARS (MIN.)GR-60Height of Steel Reinforced Footing With Solid Cast Stemwall 3,000 lb/ft42" Structural weight per lineal footalong the footing perimeter (lb/ft)5,000 lb/ft 3,500 lb/ft36"4,000 lb/ft30"2,500 lb/ft24"2,000 lb/ft18" Earth Contact Products3 4 5 6 7 8 9PIER SPACING - feetImportant Note:Building techniques and Building Codes vary across the country; the graphs presented here are tobeusedonlyasageneralguideforspacingrequirements,forpreliminarydesigns,andforestimation purposes.It is recommended that a registered professional engineer conduct the finaldesign and supervise the installation.ECP Steel Piers - Technical Design Manual2021 Earth Contact Products, L.L.C.2021-09 Chapter 6 - Page 124 All rights reserved'