diff --git a/uni/mmme/2044_design_manufacture_and_project/shaft_design.md b/uni/mmme/2044_design_manufacture_and_project/shaft_design.md
index ebb3ddb..5dd5e4d 100755
--- a/uni/mmme/2044_design_manufacture_and_project/shaft_design.md
+++ b/uni/mmme/2044_design_manufacture_and_project/shaft_design.md
@@ -226,10 +226,10 @@ design.
 Simply multiply the maximum stresses and loads you expect by the safety factor, $n_s$, and assume
 that as your maximum stress and load.
 
-$n_s$ | Operational conditions and use of materials
------ | -------------------------------------------
-1.25-1.50 | Reliable materials under controlled conditions, known stresses with certainty
-1.50-2.00 | Well-known materials under reasonably constant environmental condition, known stresses
-2.00-2.50 | Average materials subjected to known loads and stresses and environment (LSE)
-2.50-3.00 | Lesser well-known materials under average conditions LSE
-3.00-3.40 | Untried materials under average conditions of stresses and environment, or well known materials under uncertain LSE
+| $n_s$     | Operational conditions and use of materials                                                                         |
+|-----------|---------------------------------------------------------------------------------------------------------------------|
+| 1.25-1.50 | Reliable materials under controlled conditions, known stresses with certainty                                       |
+| 1.50-2.00 | Well-known materials under reasonably constant environmental condition, known stresses                              |
+| 2.00-2.50 | Average materials subjected to known loads and stresses and environment (LSE)                                       |
+| 2.50-3.00 | Lesser well-known materials under average conditions LSE                                                            |
+| 3.00-3.40 | Untried materials under average conditions of stresses and environment, or well known materials under uncertain LSE |