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These are out-of plane wind area loads applied to the design of components and cladding (C&C) on all the walls on an entire building face at each level. The program shows both windward and leeward (suction) loads on the screen, but the leeward loads are usually used for design.
The program accounts for the case of a windward load governing for bending and a leeward load of a different magnitude affecting nail withdrawal.
C&C loads are ignored unless applied to a perimeter wall. Exterior non-shear walls are designed for C&C loads only.
The C&C pressure is specified for both the end and inner zones of the wall. The end zone is defined as a perimeter strip where C&C wind pressure is at its maximum. The end zone pressure is used to determine stud spacing, sheathing thickness, nail size, edge nail spacing for the whole wall, and interior panel (field) nail spacing within the end zone. The inner zone value is only used to determine field nail spacing outside of the end zone.
Note that the program displays the C&C loads on each surface that are derived from the wind direction showing, and that may not be the one used for design, especially if it is a windward pressure.
Because different wall lines can have different reference heights h because they are on different blocks, but be on the same face of the building in terms of N, S, E, W directions, the program assigns separate C&C loads to each wall line.