Dist:

This represents the distance, measured from the left end of the beam, to the point load.

DL:

This represents the magnitude of the dead load.

PosRed:

This represents the magnitude of the positive reducible live load.

PosStor:

This represents the magnitude of the positive storage live load.

PosNonRed:

This represents the magnitude of the positive nonreducible live load.

NegRed:

This represents the magnitude of the negative reducible live load.

NegStor:

This represents the magnitude of the negative storage live load.

NegNonRed:

This represents the magnitude of the negative nonreducible live load.

PosRoof:

This represents the magnitude of the positive roof live load.

NegRoof:

This represents the magnitude of the negative roof live load.