diff --git a/StandaloneViewer/StandaloneViewer/client/components/viewer/viewer.js b/StandaloneViewer/StandaloneViewer/client/components/viewer/viewer.js
index 4cb4ad7cb..8ced1b710 100644
--- a/StandaloneViewer/StandaloneViewer/client/components/viewer/viewer.js
+++ b/StandaloneViewer/StandaloneViewer/client/components/viewer/viewer.js
@@ -19,6 +19,33 @@ Session.setDefault('activeViewport', false);
 Session.setDefault('leftSidebar', false);
 Session.setDefault('rightSidebar', false);
 
+/**
+ * Inits OHIF Hanging Protocol's onReady.
+ * It waits for OHIF Hanging Protocol to be ready to instantiate the ProtocolEngine
+ * Hanging Protocol will use OHIF LayoutManager to render viewports properly
+ */
+const initHangingProtocol = () => {
+    // When Hanging Protocol is ready
+    HP.ProtocolStore.onReady(() => {
+
+        // Gets all StudyMetadata objects: necessary for Hanging Protocol to access study metadata
+        const studyMetadataList = OHIF.viewer.StudyMetadataList.all();
+
+        // Caches Layout Manager: Hanging Protocol uses it for layout management according to current protocol
+        const layoutManager = OHIF.viewerbase.layoutManager;
+
+        // Instantiate StudyMetadataSource: necessary for Hanging Protocol to get study metadata
+        const studyMetadataSource = new StudyList.classes.OHIFStudyMetadataSource();
+
+        // Creates Protocol Engine object with required arguments
+        const ProtocolEngine = new HP.ProtocolEngine(layoutManager, studyMetadataList, [], studyMetadataSource);
+
+        // Sets up Hanging Protocol engine
+        HP.setEngine(ProtocolEngine);
+
+    });
+};
+
 Template.viewer.onCreated(() => {
     const instance = Template.instance();
 
@@ -61,6 +88,22 @@ Template.viewer.onCreated(() => {
     Session.set('ViewerData', ViewerData);
 });
 
+Template.viewer.onRendered(function() {
+
+    this.autorun(function() {
+        // To make sure ohif viewerMain is rendered before initializing Hanging Protocols
+        const isOHIFViewerMainRendered = Session.get('OHIFViewerMainRendered');
+
+        // To avoid first run
+        if (isOHIFViewerMainRendered) {
+            // To run only when ViewerMainRendered dependency has changed.
+            // because initHangingProtocol can have other reactive components
+            Tracker.nonreactive(initHangingProtocol);
+        }
+    });
+
+});
+
 Template.viewer.events({
     'click .js-toggle-studies'() {
         const instance = Template.instance();