First an explanation of the terminology.
Line Load -a horizontal force at the top of the balustrade. Intended to mimic the force of a person leaning on the top of the balustrade. It is measured in kN/m and loading requirements are given be EN 1991-1. The deflection does not exceed L/65 or 25 mm
Uniform Distributed Load (UDL)– is related to the pressure exerted on the infill area (that part of the barrier below the position of application of the line load). It is generally given in the form of kN/m2, applied over the entire infill area.
Point Load (Concentrated Load)-takes into account any non-uniformity of the load applied to the infill and may also represent a static equivalent to a localised human impact (from hand, knee, elbow, etc.). It is generally given in the form of kN, applied at the most vulnerable position on the infill area.