You can now add structural connections to members

src/ifcopenshell-python/ifcopenshell/api/structural/add_structural_member_connection.py

@@ -0,0 +1,19 @@
+import ifcopenshell
+import ifcopenshell.api
+
+
+class Usecase:
+    def __init__(self, file, **settings):
+        self.file = file
+        self.settings = {"relating_structural_member": None, "related_structural_connection": None}
+        for key, value in settings.items():
+            self.settings[key] = value
+
+    def execute(self):
+        for connection in self.settings["related_structural_connection"].ConnectsStructuralMembers or []:
+            if connection.RelatingStructuralMember == self.settings["relating_structural_member"]:
+                return
+        rel = ifcopenshell.api.run("root.create_entity", self.file, ifc_class="IfcRelConnectsStructuralMember")
+        rel.RelatingStructuralMember = self.settings["relating_structural_member"]
+        rel.RelatedStructuralConnection = self.settings["related_structural_connection"]
+        return rel