when applying non structural mass to a beam in Abaqus , ie with the 

*nonstructural mass, elset=set-1, units=TOTAL MASS
500.,

card, am I correct in thinking that I am applying 500 lb *weight* of mass evenly on along the beam?

my density units for material are (lbs/cubic in), will I need to convert either of these units in order for the correct amount of nonstructural mass to be applied? ie, by dividing the value by 386.4 to get the actual weight applied?

*Material, name="steel"
*Density
0.284,
*Elastic
2.9e+07, 0.33

Thanks