Loading Arm Solutions from S&S Technical with In House Electric Heat Trace & Insulation. Can you buy a truck or railcar loading arm from a loading arm companies multiple distributor network – sure. But where are the gaps. Do you get in house help with pump sizing, pressure drop and nozzle load calculations, loads/reactions needed for loading arm support steel or standpost, design service with 3D model to ensure the arm works with varying site conditions and is operator friendly, capability to do Class 1, Div 1 or Div. 2 electric tracing with custom fit insulation jackets, electrical drawings, junction box/panel build, arc flash study? Sometimes you just need an arm and sometimes you need more. Arm example is for rear truck bottom unloading of a polymer material for a GOV contractor who makes rocket casings.