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--- wiki:sns:intactgh:surface_loads [2023/08/15 08:23] – eli
+++ wiki:sns:intactgh:surface_loads [2025/08/13 10:00] (current) – goldy
@@ Line 4: / Line 4: @@
 ====== Surface Loads ======
 <WRAP half column>
-Surface loads are applied to faces of the components participating in the simulation by connecting to the Loads input on the stress solver component.
+Surface loads are applied to faces of the components participating in the simulation by connecting to the Loads input on the stress solver component. ⚠️Also, refer to [[wiki:sns:intactgh:lists|Using lists for Intact components]] for explanation of how list input works with Load Blocks.
 </WRAP>
 <WRAP half column>
 {{ :wiki:sns:intactgh:stress_block_loads.png?150 }}
 </WRAP>
 ===== Vector Force =====
 <WRAP group>
@@ Line 41: / Line 41: @@
 <WRAP group>
 <WRAP half column>
-A "Pressure" load is a surface load specified in terms of force per unit area. Positive pressures push into the surface, negative pressure pull.
+A "Pressure" load is a surface load specified in terms of force per unit area that is normal to the surface. Positive pressures push into the surface, negative pressure pull.
 A Pressure Load requires two inputs:
@@ Line 63: / Line 63: @@
 <WRAP half column>
 {{ :wiki:sns:snsgrasshopper:torque_load.png?200 }}
+</WRAP>
+</WRAP>
+===== Hydrostatic Load =====
+<WRAP group>
+<WRAP half column>
+A “Hydrostatic” load is a spatially varying pressure as experienced by the walls of a pool due to the weight of the water pressing against them. The pressure at any point depends on the density of the water, increasing from a value of zero at the water surface to a maximum at the deepest point.
+A Hydrostatic load requires three inputs:
+  * the geometry of the surfaces where the load is applied
+  * a point on the surface of the fluid (fluid depth is assumed in the -Z direction)
+  * specific gravity of the fluid (dimensionless, SG = 1 for water)
+</WRAP>
+<WRAP half column>
+{{ :wiki:sns:intactgh:hydrostatic_load_block.png?200 }}
 </WRAP>
 </WRAP>