Lightweightkeelcanbedividedintotwocategories,namely,ceilingkeelandwallkeel,whichtheformeronec***istsofcarryingkeel(themainkeel),claddingkeel(auxiliarykeel),aswellasvariouscomponentparts,coveringD38(UC38),D50(UC50)andD60(UC60)threeseries.D38isusedfor900-1200mm(distancebetweenhoistingpoints)nonepeopleceiling;D50isusedfor900-1200(distancebetweenhoistingpoints)human-touchceiling;D60isusedfor1500mmweight-increaseceiling.U50andU60areforcladdingkeel.Wallkeelc***istsofcrosskeel,verticalkeel,crossarmkeelandvariouscomponentparts,includingQ50(C50),Q75(C75),Q100(C100)andQ150(C150)fourseries.)