diff --git a/libraries/ashrae/guideline36/5.16.14-multiple-zone-vav-ahu-afdd.ttl b/libraries/ashrae/guideline36/5.16.14-multiple-zone-vav-ahu-afdd.ttl
index 1c617367..18f5164c 100644
--- a/libraries/ashrae/guideline36/5.16.14-multiple-zone-vav-ahu-afdd.ttl
+++ b/libraries/ashrae/guideline36/5.16.14-multiple-zone-vav-ahu-afdd.ttl
@@ -133,11 +133,8 @@
           sh:qualifiedMinCount 1 ;
         ]
     ) ;
-    sh:property [
-        sh:path brick:hasPoint ;
-        sh:qualifiedValueShape [ sh:node :percent-oa-minimum ] ;
-        sh:qualifiedMinCount 1 ;
-    ] .
+    # use subclassof to compose shapes
+    rdfs:subClassOf :percent-oa-minimum .
 
 :percent-oa-fraction a sh:NodeShape, owl:Class ;
     rdfs:label "%OA" ;