diff --git a/scss/README.md b/scss/README.md
index 79235853..29f3eec2 100644
--- a/scss/README.md
+++ b/scss/README.md
@@ -24,3 +24,57 @@ Overrides and Modifications
---
When making modifications to the default USWDS components, please refer to the original source, and make a `.scss` file of the same name. Annotate the top of the file with a reference to the USWDS documentation and source code.
+
+Row/Column System
+---
+
+The USWDS current grid system is fairly outdated and does not cleanly meet the needs of the AT-ST UI. A simplified, flexbox-powered row/column system is implemented in its place.
+
+```
+
+```
+
+To make a column expand to fill up all available space relative to its sibling columns:
+
+```
+
+```
+
+To add uniform padding to rows and columns:
+
+```
+
+```
+
+Layouts and behaviors for specific row/col use cases should be handled on a case by case basis:
+
+```
+
+
+...
+
+.foo.row {
+ .col {
+ flex: 1;
+ }
+ .foo__bar {
+ flex: 2;
+ }
+}
+```